Hướng dẫn how do you sum without sum function in python? - làm thế nào để bạn tính tổng mà không có hàm sum trong python?

Hiểu vấn đề tổng kết

Tóm tắt các giá trị số với nhau là một vấn đề khá phổ biến trong lập trình. Ví dụ: giả sử bạn có một danh sách các số [1, 2, 3, 4, 5] và muốn thêm chúng lại với nhau để tính tổng số tiền của chúng. Với số học tiêu chuẩn, bạn sẽ làm một cái gì đó như thế này:

1 + 2 + 3 + 4 + 5 = 15

Theo như toán học, biểu thức này khá đơn giản. Nó hướng dẫn bạn qua một loạt các bổ sung ngắn cho đến khi bạn tìm thấy tổng của tất cả các số.

Nó có thể thực hiện tính toán cụ thể này bằng tay, nhưng hãy tưởng tượng một số tình huống khác mà nó có thể không quá có thể. Nếu bạn có một danh sách các số đặc biệt dài, việc thêm bằng tay có thể không hiệu quả và dễ bị lỗi. Điều gì xảy ra nếu bạn không biết thậm chí biết có bao nhiêu mặt hàng trong danh sách? Cuối cùng, hãy tưởng tượng một kịch bản trong đó số lượng vật phẩm bạn cần thêm thay đổi một cách linh hoạt hoặc không thể đoán trước.

Trong các tình huống như thế này, cho dù bạn có một danh sách dài hay ngắn, Python có thể khá hữu ích để giải quyết các vấn đề tổng kết.summation problems.

Nếu bạn muốn tổng hợp các số bằng cách tạo giải pháp của riêng mình từ đầu, thì bạn có thể thử sử dụng vòng lặp

xAmount = int[input["How man numbers would you like to input: "]]
result = 0

for i in range[0, xAmount]:
     result = result + int[input["Enter a number: "]]

print[result]

>>>

>>> numbers = [1, 2, 3, 4, 5]
>>> total = 0

>>> for number in numbers:
...     total += number
...

>>> total
15

Ở đây, trước tiên bạn tạo

xAmount = int[input["How man numbers would you like to input: "]]
result = 0

for i in range[0, xAmount]:
     result = result + int[input["Enter a number: "]]

print[result]

xAmount = int[input["How man numbers would you like to input: "]]
result = 0

for i in range[0, xAmount]:
     result = result + int[input["Enter a number: "]]

print[result]

num_total = 0
for value in numList:
    num_total += value

xAmount = int[input["How man numbers would you like to input: "]]
result = 0

for i in range[0, xAmount]:
     result = result + int[input["Enter a number: "]]

print[result]

Bạn cũng có thể quấn vòng

xAmount = int[input["How man numbers would you like to input: "]]
result = 0

for i in range[0, xAmount]:
     result = result + int[input["Enter a number: "]]

print[result]

>>>

>>> def sum_numbers[numbers]:
...     total = 0
...     for number in numbers:
...         total += number
...     return total
...

>>> sum_numbers[[1, 2, 3, 4, 5]]
15

>>> sum_numbers[[]]
0

>>> numbers = [1, 2, 3, 4, 5]
>>> total = 0

>>> for number in numbers:
...     total += number
...

>>> total
15

Ở đây, trước tiên bạn tạo

xAmount = int[input["How man numbers would you like to input: "]]
result = 0

for i in range[0, xAmount]:
     result = result + int[input["Enter a number: "]]

print[result]

xAmount = int[input["How man numbers would you like to input: "]]
result = 0

for i in range[0, xAmount]:
     result = result + int[input["Enter a number: "]]

print[result]

num_total = 0
for value in numList:
    num_total += value

xAmount = int[input["How man numbers would you like to input: "]]
result = 0

for i in range[0, xAmount]:
     result = result + int[input["Enter a number: "]]

print[result]

>>>

>>> def sum_numbers[numbers]:
...     if len[numbers] == 0:
...         return 0
...     return numbers[0] + sum_numbers[numbers[1:]]
...

>>> sum_numbers[[1, 2, 3, 4, 5]]
15

>>> numbers = [1, 2, 3, 4, 5]
>>> total = 0

>>> for number in numbers:
...     total += number
...

>>> total
15

Trong ví dụ trên, trường hợp cơ sở ngụ ý rằng tổng của danh sách không có độ dài là

xAmount = int[input["How man numbers would you like to input: "]]
result = 0

for i in range[0, xAmount]:
     result = result + int[input["Enter a number: "]]

print[result]

num_total = 0
for value in numList:
    num_total += value

num_total = 0
for value in numList:
    num_total += value

num_total = 0
for value in numList:
    num_total += value

num_total = 0
for value in numList:
    num_total += value

Một tùy chọn khác để tổng hợp danh sách các số trong Python là sử dụng

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

>>>

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

Bạn có thể gọi

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

Trong ví dụ đầu tiên, hàm giảm là

>>> numbers = [1, 2, 3, 4, 5]
>>> total = 0

>>> for number in numbers:
...     total += number
...

>>> total
15

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

>>> numbers = [1, 2, 3, 4, 5]
>>> total = 0

>>> for number in numbers:
...     total += number
...

>>> total
15

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

Trong ví dụ thứ hai, hàm giảm là hàm

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

Vì các tổng như thế này là phổ biến trong lập trình, mã hóa một hàm mới mỗi khi bạn cần tổng hợp một số số là rất nhiều công việc lặp đi lặp lại. Ngoài ra, sử dụng

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

Python cung cấp một chức năng tích hợp chuyên dụng để giải quyết vấn đề này. Hàm được gọi là

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

Bắt đầu với Python từ

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

8

Khả năng đọc là một trong những nguyên tắc quan trọng nhất đằng sau triết lý Python. Trực quan hóa những gì bạn đang yêu cầu một vòng lặp làm khi tổng hợp một danh sách các giá trị. Bạn muốn nó lặp qua một số số, tích lũy chúng trong một biến trung gian và trả lại tổng cuối cùng. Tuy nhiên, có lẽ bạn có thể tưởng tượng một phiên bản tổng kết dễ đọc hơn mà không cần một vòng lặp. Bạn muốn Python lấy một số số và tổng hợp chúng lại với nhau.

Bây giờ hãy nghĩ về cách

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

Đây là lý do tại sao Python 2.3 đã thêm

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

>>>

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

Bạn có thể gọi

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

Trong ví dụ đầu tiên, hàm giảm là

>>> numbers = [1, 2, 3, 4, 5]
>>> total = 0

>>> for number in numbers:
...     total += number
...

>>> total
15

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

>>> numbers = [1, 2, 3, 4, 5]
>>> total = 0

>>> for number in numbers:
...     total += number
...

>>> total
15

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

1. Trong ví dụ thứ hai, hàm giảm là hàm

   from functools import reduce
   from operator import add
   num_total = reduce[add, numList, 0]
   

   4 trả về việc bổ sung hai số. is a required argument that can hold any Python iterable. The iterable typically contains numeric values but can also contain lists or tuples.
2. Vì các tổng như thế này là phổ biến trong lập trình, mã hóa một hàm mới mỗi khi bạn cần tổng hợp một số số là rất nhiều công việc lặp đi lặp lại. Ngoài ra, sử dụng

   from functools import reduce
   from operator import add
   num_total = reduce[add, numList, 0]
   

   1 là giải pháp dễ đọc nhất có sẵn cho bạn. is an optional argument that can hold an initial value. This value is then added to the final result. It defaults to

   xAmount = int[input["How man numbers would you like to input: "]]
   result = 0
   
   for i in range[0, xAmount]:
        result = result + int[input["Enter a number: "]]
   
   print[result]
   

   9.

Python cung cấp một chức năng tích hợp chuyên dụng để giải quyết vấn đề này. Hàm được gọi là

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

Bắt đầu với Python từ

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

>>> numbers = [1, 2, 3, 4, 5]
>>> total = 0

>>> for number in numbers:
...     total += number
...

>>> total
15

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

>>> numbers = [1, 2, 3, 4, 5]
>>> total = 0

>>> for number in numbers:
...     total += number
...

>>> total
15

from functools import reduce
from operator import add
num_total = reduce[add, numList, 0]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

>>> def sum_numbers[numbers]:
...     if len[numbers] == 0:
...         return 0
...     return numbers[0] + sum_numbers[numbers[1:]]
...

>>> sum_numbers[[1, 2, 3, 4, 5]]
15

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

Đối số tùy chọn:

>>> def sum_numbers[numbers]:
...     if len[numbers] == 0:
...         return 0
...     return numbers[0] + sum_numbers[numbers[1:]]
...

>>> sum_numbers[[1, 2, 3, 4, 5]]
15

2

Đối số thứ hai và tùy chọn,

>>> def sum_numbers[numbers]:
...     if len[numbers] == 0:
...         return 0
...     return numbers[0] + sum_numbers[numbers[1:]]
...

>>> sum_numbers[[1, 2, 3, 4, 5]]
15

Ở đây, bạn cung cấp giá trị ban đầu là

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

>>> def sum_numbers[numbers]:
...     if len[numbers] == 0:
...         return 0
...     return numbers[0] + sum_numbers[numbers[1:]]
...

>>> sum_numbers[[1, 2, 3, 4, 5]]
15

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

>>> def sum_numbers[numbers]:
...     if len[numbers] == 0:
...         return 0
...     return numbers[0] + sum_numbers[numbers[1:]]
...

>>> sum_numbers[[1, 2, 3, 4, 5]]
15

>>>

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

Nếu bạn không cung cấp giá trị cho

>>> def sum_numbers[numbers]:
...     if len[numbers] == 0:
...         return 0
...     return numbers[0] + sum_numbers[numbers[1:]]
...

>>> sum_numbers[[1, 2, 3, 4, 5]]
15

xAmount = int[input["How man numbers would you like to input: "]]
result = 0

for i in range[0, xAmount]:
     result = result + int[input["Enter a number: "]]

print[result]

xAmount = int[input["How man numbers would you like to input: "]]
result = 0

for i in range[0, xAmount]:
     result = result + int[input["Enter a number: "]]

print[result]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

Tổng giá trị số

Mục đích chính của

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

8 là cung cấp một cách pythonic để thêm các giá trị số lại với nhau. Cho đến thời điểm này, bạn đã thấy cách sử dụng hàm để tổng số số nguyên. Ngoài ra, bạn có thể sử dụng

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

8 với bất kỳ loại python số nào khác, chẳng hạn như

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

23,

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

24,

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

25 và

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

26.

Dưới đây là một vài ví dụ về việc sử dụng

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

>>>

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

Ở đây, trước tiên bạn sử dụng

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

Các ví dụ khác tổng số lặp của các số

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

>>>

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

Trình tự nối

Mặc dù

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

8 chủ yếu nhằm hoạt động trên các giá trị số, bạn cũng có thể sử dụng hàm để nối các chuỗi như danh sách và bộ dữ liệu. Để làm điều đó, bạn cần cung cấp một giá trị phù hợp cho

>>> def sum_numbers[numbers]:
...     if len[numbers] == 0:
...         return 0
...     return numbers[0] + sum_numbers[numbers[1:]]
...

>>> sum_numbers[[1, 2, 3, 4, 5]]
15

2:

Trong các ví dụ này, bạn sử dụng

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

>>> def sum_numbers[numbers]:
...     if len[numbers] == 0:
...         return 0
...     return numbers[0] + sum_numbers[numbers[1:]]
...

>>> sum_numbers[[1, 2, 3, 4, 5]]
15

>>> def sum_numbers[numbers]:
...     if len[numbers] == 0:
...         return 0
...     return numbers[0] + sum_numbers[numbers[1:]]
...

>>> sum_numbers[[1, 2, 3, 4, 5]]
15

Trong các ví dụ trên,

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

Khi bạn cố gắng sử dụng

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

>>> numbers = [1, 2, 3, 4, 5]
>>> total = 0

>>> for number in numbers:
...     total += number
...

>>> total
15

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

>>> def sum_numbers[numbers]:
...     if len[numbers] == 0:
...         return 0
...     return numbers[0] + sum_numbers[numbers[1:]]
...

>>> sum_numbers[[1, 2, 3, 4, 5]]
15

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]
result = 0

for i in range[0, xAmount]:
     result = result + int[input["Enter a number: "]]

print[result]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

Một nhược điểm quan trọng của bất kỳ giải pháp nào ngụ ý sự kết hợp là đằng sau hậu trường, mọi bước trung gian đều tạo ra một danh sách mới. Điều này có thể khá lãng phí về mặt sử dụng bộ nhớ. Danh sách cuối cùng được trả lại chỉ là danh sách được tạo gần đây nhất trong số tất cả các danh sách được tạo ra ở mỗi vòng kết nối. Thay vào đó, sử dụng danh sách hiểu biết rằng bạn tạo và trả về chỉ một danh sách:

Phiên bản mới này của

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

Sử dụng

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

Trong phiên bản

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]
result = 0

for i in range[0, xAmount]:
     result = result + int[input["Enter a number: "]]

print[result]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

def add[x,y]:
    """Return the sum of x and y. [Actually this does the same thing as int.__add__]"""
    print '--> %d + %d =>' % [x,y] # Illustrate what reduce is actually doing.
    return x + y

total = reduce[add, [0,2,4,6,8,10,12]]
--> 0 + 2 =>
--> 2 + 4 =>
--> 6 + 6 =>
--> 12 + 8 =>
--> 20 + 10 =>
--> 30 + 12 =>

print total
42

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []

for i in range[0, xAmount]:
     numList.append[int[input["Enter a number: "]]]



print[numList]

Sự kết luận

Bây giờ bạn có thể sử dụng chức năng tích hợp Python,

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

xAmount = int[input["How man numbers would you like to input: "]]

numList = []
numList_sum = 0

for i in range[0, xAmount]:
     inputted_number = int[input["Enter a number: "]]
     numList_sum += inputted_number
     numList.append[inputted_number]



print[numList]
print[numList_sum]

Trong hướng dẫn này, bạn đã học được cách:

• Tổng các giá trị số bằng các kỹ thuật và công cụ chunggeneral techniques and tools
• Thêm một số giá trị số một cách hiệu quả bằng cách sử dụng Python từ

  xAmount = int[input["How man numbers would you like to input: "]]
  
  numList = []
  numList_sum = 0
  
  for i in range[0, xAmount]:
       inputted_number = int[input["Enter a number: "]]
       numList_sum += inputted_number
       numList.append[inputted_number]
  
  
  
  print[numList]
  print[numList_sum]
  

  8Python’s

  xAmount = int[input["How man numbers would you like to input: "]]
  
  numList = []
  numList_sum = 0
  
  for i in range[0, xAmount]:
       inputted_number = int[input["Enter a number: "]]
       numList_sum += inputted_number
       numList.append[inputted_number]
  
  
  
  print[numList]
  print[numList_sum]
  

  8
• Trình tự Concatenate sử dụng

  xAmount = int[input["How man numbers would you like to input: "]]
  
  numList = []
  numList_sum = 0
  
  for i in range[0, xAmount]:
       inputted_number = int[input["Enter a number: "]]
       numList_sum += inputted_number
       numList.append[inputted_number]
  
  
  
  print[numList]
  print[numList_sum]
  

  8 using

  xAmount = int[input["How man numbers would you like to input: "]]
  
  numList = []
  numList_sum = 0
  
  for i in range[0, xAmount]:
       inputted_number = int[input["Enter a number: "]]
       numList_sum += inputted_number
       numList.append[inputted_number]
  
  
  
  print[numList]
  print[numList_sum]
  

  8
• Sử dụng

  xAmount = int[input["How man numbers would you like to input: "]]
  
  numList = []
  numList_sum = 0
  
  for i in range[0, xAmount]:
       inputted_number = int[input["Enter a number: "]]
       numList_sum += inputted_number
       numList.append[inputted_number]
  
  
  
  print[numList]
  print[numList_sum]
  

  8 để tiếp cận các vấn đề tổng hợp phổ biếnsummation problems
• Sử dụng các giá trị phù hợp cho các đối số

  from functools import reduce
  from operator import add
  num_total = reduce[add, numList, 0]
  

  8 và

  >>> def sum_numbers[numbers]:
  ...     if len[numbers] == 0:
  ...         return 0
  ...     return numbers[0] + sum_numbers[numbers[1:]]
  ...
  
  >>> sum_numbers[[1, 2, 3, 4, 5]]
  15
  

  2 trong

  xAmount = int[input["How man numbers would you like to input: "]]
  
  numList = []
  numList_sum = 0
  
  for i in range[0, xAmount]:
       inputted_number = int[input["Enter a number: "]]
       numList_sum += inputted_number
       numList.append[inputted_number]
  
  
  
  print[numList]
  print[numList_sum]
  

  8

  from functools import reduce
  from operator import add
  num_total = reduce[add, numList, 0]
  

  8 and

  >>> def sum_numbers[numbers]:
  ...     if len[numbers] == 0:
  ...         return 0
  ...     return numbers[0] + sum_numbers[numbers[1:]]
  ...
  
  >>> sum_numbers[[1, 2, 3, 4, 5]]
  15
  

  2 arguments in

  xAmount = int[input["How man numbers would you like to input: "]]
  
  numList = []
  numList_sum = 0
  
  for i in range[0, xAmount]:
       inputted_number = int[input["Enter a number: "]]
       numList_sum += inputted_number
       numList.append[inputted_number]
  
  
  
  print[numList]
  print[numList_sum]
  

  8
• Quyết định giữa

  xAmount = int[input["How man numbers would you like to input: "]]
  
  numList = []
  numList_sum = 0
  
  for i in range[0, xAmount]:
       inputted_number = int[input["Enter a number: "]]
       numList_sum += inputted_number
       numList.append[inputted_number]
  
  
  
  print[numList]
  print[numList_sum]
  

  8 và các công cụ thay thế cho các đối tượng tổng hợp và concatenatealternative tools to sum and concatenate objects

Với kiến ​​thức này, giờ đây bạn có thể thêm nhiều giá trị số lại với nhau theo cách pythonic, dễ đọc và hiệu quả.