Python loop through variable names
I have a group of variables named k1, k2 k3....k52. They variables are lists/numpy arrays depending on the scenario. Essentially I'd like to perform the same manipulation on them en masse within a loop, but am having trouble ierating over them. Essentially what i'd like is something like this: Show
Obviously i know the above wont work, but it gives the idea. My actual attempt is this:
(Its changed to a numpy array so i can log it, and then back to a list so i change the variable name back to what it was) Thanks for any help you can provide. I get the feeling this is something quite simple, but its escaping me at the moment. edit: thanks very much for the answers, i should have explained that I can't really store them a set array, they need to remain as independent variables for reasons i don't really want to go into. Hi. I have four lists: list_0, list_1, list_2, list_3. I want to apply a long block of code to each, which would be much more concise if I iterated through a loop, or defined a function that would do it, for each list. I was thinking something of the form: for i in range(0,3): list_i = long_block_of_code but, list_i is not defined. My other thought was to include something something like a {}.format() , but I can't seem to make that work either. any help is appreciated
A for loop executes commands once for each value in a collection.
The first line of the for loop must end with a colon, and the body must be indented.
A for loop is made up of a collection, a loop variable, and a body.
Loop variable names follow the normal variable name conventions.
The body of a loop can contain many statements.
Use range to iterate over a sequence of numbers.
Or use range to repeat an action an arbitrary number of times.
The Accumulator pattern turns many values into one.
Can a for loop be a variable in Python?Python for loop components
In general, any object that supports Python's iterator protocol can be used in a for loop. A variable that holds each element from the container/sequence/generator.
How do you dynamically change a variable name in python?Use the for Loop to Create a Dynamic Variable Name in Python
The globals() method in Python provides the output as a dictionary of the current global symbol table. The following code uses the for loop and the globals() method to create a dynamic variable name in Python. Output: Copy Hello from variable number 5!
How do you change a variable name in a loop?You can't change the name of a variable. What you probably want to do is create new values with new names each time through the loop.. variable = 0.. mylist = [0, 1, 2, 3]. for x in mylist:. variable = x.. How do you declare a dynamic variable in Python?This approach will also use the globals() function in addition to the for loop. Python's globals() function returns a dictionary containing the current global symbol table. In Python, the for loop and the globals() function are used to construct a dynamic variable name.
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