Hướng dẫn write a python program to perform write writelines read readlines methods on files - viết chương trình python để thực hiện các phương thức ghi writelines read readlines trên tệp
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Python cung cấp các chức năng sẵn có để tạo, viết và đọc các tệp. Có hai loại tệp có thể được xử lý trong Python, tệp văn bản thông thường và tệp nhị phân (được viết bằng ngôn ngữ nhị phân, 0S và 1S). Show
Trong bài viết này, chúng tôi sẽ tập trung vào việc mở, đóng, đọc và ghi dữ liệu trong một tệp văn bản. Chế độ truy cập tập tin Các chế độ truy cập chi phối loại hoạt động có thể trong tệp đã mở. Nó đề cập đến cách tệp sẽ được sử dụng sau khi mở. Các chế độ này cũng xác định vị trí của xử lý tệp trong tệp. Xử lý tệp giống như một con trỏ, xác định từ nơi dữ liệu phải được đọc hoặc ghi trong tệp. Có 6 chế độ truy cập trong Python.File Handle in the file. File handle is like a cursor, which defines from where the data has to be read or written in the file. There are 6 access modes in python.
Cách các tệp được tải vào bộ nhớ chính Có hai loại bộ nhớ trong máy tính, tức là bộ nhớ chính và phụ Mỗi tệp mà bạn đã lưu hoặc bất kỳ ai được lưu đều trên bộ nhớ phụ gây ra bất kỳ dữ liệu nào trong bộ nhớ chính sẽ bị xóa khi máy tính bị tắt. Vì vậy, khi bạn cần thay đổi bất kỳ tệp văn bản nào hoặc chỉ để làm việc với chúng trong Python, bạn cần tải tệp đó vào bộ nhớ chính. Python tương tác với các tệp được tải trong bộ nhớ chính hoặc bộ nhớ chính thông qua các trình xử lý tệp của Google (đây là cách hệ điều hành của bạn cung cấp quyền truy cập vào Python để tương tác với tệp bạn đã mở bằng cách tìm kiếm tệp trong bộ nhớ của nó nếu thấy nó trả về trình xử lý tệp và sau đó Bạn có thể làm việc với tập tin).“file handlers” ( This is how your operating system gives access to python to interact with the file you opened by searching the file in its memory if found it returns a file handler and then you can work with the file ). Mở một tập tin Nó được thực hiện bằng cách sử dụng hàm open (). Không có mô -đun nào được yêu cầu nhập khẩu cho chức năng này. File_object = open(r"File_Name","Access_Mode") Tệp phải tồn tại trong cùng thư mục với tệp chương trình Python khác, địa chỉ đầy đủ của tệp nên được viết thay cho tên tệp. Lưu ý: R được đặt trước tên tệp để ngăn các ký tự trong chuỗi tệp được coi là ký tự đặc biệt. Ví dụ: nếu có \ temp trong địa chỉ tệp, thì \ t được coi là ký tự tab và lỗi được nêu ra của địa chỉ không hợp lệ. R làm cho chuỗi thô, nghĩa là, nó cho biết rằng chuỗi không có bất kỳ ký tự đặc biệt nào. R có thể bị bỏ qua nếu tệp nằm trong cùng một thư mục và địa chỉ không được đặt. & NBSP;r is placed before the filename to prevent the characters in the filename string to be treated as special characters. For example, if there is \temp in the file address, then \t is treated as the tab character, and an error is raised of invalid address. The r makes the string raw, that is, it tells that the string is without any special characters. The r can be ignored if the file is in the same directory and the address is not being placed. Python
File_object.write(str1)0 File_object.write(str1)1 File_object.write(str1)2 File_object.write(str1)3 File_object.write(str1)4 File_object.write(str1)5 File_object.write(str1)6 = File_object.write(str1)0 File_object.write(str1)9 File_object.writelines(L) for L = [str1, str2, str3]0 File_object.write(str1)3 File_object.writelines(L) for L = [str1, str2, str3]2222 Ở đây, File1 được tạo như một đối tượng cho MyFile1 và File2 làm đối tượng cho MyFile2 Đóng một tập tin  Đóng () hàm đóng tệp và giải phóng không gian bộ nhớ thu được bởi tệp đó. Nó được sử dụng tại thời điểm tệp không còn cần thiết hoặc nếu nó được mở ở chế độ tệp khác. File_object.close () & nbsp; Python
File_object.write(str1)0 File_object.write(str1)1 File_object.write(str1)2 File_object.write(str1)3 File_object.write(str1)4 File_object.write(str1)5 File_object.read([n])2
Ở đây, File1 được tạo như một đối tượng cho MyFile1 và File2 làm đối tượng cho MyFile2
File_object.write(str1)
File_object.writelines(L) for L = [str1, str2, str3] Ghi vào một tệp Có hai cách để viết trong một tập tin.
File_object.read([n])
File_object.readline([n])
File_object.readlines() Lưu ý: ‘\ n, được coi là một đặc tính đặc biệt của hai byte & nbsp;‘\n’ is treated as a special character of two bytes Python3
File_object.write(str1)0 File_object.write(str1)1 File_object.read([n])7 File_object.write(str1)3 File_object.read([n])9 File_object.write(str1)5 File_object.readline([n])1 = File_object.readline([n])3 File_object.readline([n])4 File_object.write(str1)3 File_object.readline([n])6 File_object.write(str1)3 File_object.readline([n])8 File_object.readline([n])9 File_object.readlines()0 File_object.readlines()1 File_object.write(str1)5 File_object.readlines()3 File_object.readlines()4
File_object.write(str1)0 File_object.write(str1)1 File_object.read([n])7 File_object.write(str1)3 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']1 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']2 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']3 File_object.write(str1)1 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']5 File_object.write(str1)5 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']3 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']8 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']3 Output of Readlines after appending ['This is Delhi \n', 'This is Paris \n', 'This is London \n', 'Today \n'] Output of Readlines after writing ['Tomorrow \n']0 Output of Readlines after appending ['This is Delhi \n', 'This is Paris \n', 'This is London \n', 'Today \n'] Output of Readlines after writing ['Tomorrow \n']1 Output of Readlines after appending ['This is Delhi \n', 'This is Paris \n', 'This is London \n', 'Today \n'] Output of Readlines after writing ['Tomorrow \n']2 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']2 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']3 Output of Readlines after appending ['This is Delhi \n', 'This is Paris \n', 'This is London \n', 'Today \n'] Output of Readlines after writing ['Tomorrow \n']5 Output of Readlines after appending ['This is Delhi \n', 'This is Paris \n', 'This is London \n', 'Today \n'] Output of Readlines after writing ['Tomorrow \n']6 File_object.write(str1)5 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']3 Output of Readlines after appending ['This is Delhi \n', 'This is Paris \n', 'This is London \n', 'Today \n'] Output of Readlines after writing ['Tomorrow \n']9 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']3 Output of Readlines after appending ['This is Delhi \n', 'This is Paris \n', 'This is London \n', 'Today \n'] Output of Readlines after writing ['Tomorrow \n']0 Output of Readlines after appending ['This is Delhi \n', 'This is Paris \n', 'This is London \n', 'Today \n'] Output of Readlines after writing ['Tomorrow \n']1 Output of Readlines after appending ['This is Delhi \n', 'This is Paris \n', 'This is London \n', 'Today \n'] Output of Readlines after writing ['Tomorrow \n']2 File_object.write(str1)5 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']3 File_object.write(str1)1 file1 7Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']2 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']3 =0=1=2Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']3 Output of Readlines after appending ['This is Delhi \n', 'This is Paris \n', 'This is London \n', 'Today \n'] Output of Readlines after writing ['Tomorrow \n']0 Output of Readlines after appending ['This is Delhi \n', 'This is Paris \n', 'This is London \n', 'Today \n'] Output of Readlines after writing ['Tomorrow \n']1 Output of Readlines after appending ['This is Delhi \n', 'This is Paris \n', 'This is London \n', 'Today \n'] Output of Readlines after writing ['Tomorrow \n']2 File_object.write(str1)5 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']3 File_object.write(str1)1 File_object.write(str1)00 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']2 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']3 File_object.write(str1)03 =1=2Output of Readlines after appending ['This is Delhi \n', 'This is Paris \n', 'This is London \n', 'Today \n'] Output of Readlines after writing ['Tomorrow \n']1 Output of Readlines after appending ['This is Delhi \n', 'This is Paris \n', 'This is London \n', 'Today \n'] Output of Readlines after writing ['Tomorrow \n']2 File_object.write(str1)5 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']3 File_object.write(str1)1 File_object.write(str1)11 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']2 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']3 File_object.write(str1)14 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']3 Output of Readlines after appending ['This is Delhi \n', 'This is Paris \n', 'This is London \n', 'Today \n'] Output of Readlines after writing ['Tomorrow \n']0 File_object.read([n])2 Output: Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n'] Nối vào một tập tin Python3
File_object.write(str1)0 File_object.write(str1)1 File_object.read([n])7 File_object.write(str1)3 File_object.read([n])9 File_object.write(str1)5 File_object.readline([n])1 = File_object.readline([n])3 File_object.readline([n])4 File_object.write(str1)3 File_object.readline([n])6 File_object.write(str1)3 File_object.readline([n])8 File_object.readline([n])9 File_object.readlines()3 File_object.read([n])2
File_object.write(str1)0 File_object.write(str1)1 File_object.read([n])7 File_object.write(str1)3 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']1 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']2 File_object.readlines()0 File_object.write(str1)46 File_object.write(str1)5 File_object.read([n])2 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']3 =0=1=2Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']3 File_object.write(str1)1 File_object.write(str1)59 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']2 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']3 File_object.write(str1)62 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']3 Output of Readlines after appending ['This is Delhi \n', 'This is Paris \n', 'This is London \n', 'Today \n'] Output of Readlines after writing ['Tomorrow \n']0 File_object.read([n])2
File_object.write(str1)0 File_object.write(str1)1 File_object.read([n])7 File_object.write(str1)3 File_object.read([n])9 File_object.write(str1)5 File_object.readline([n])1 = File_object.readline([n])3 File_object.readline([n])4 File_object.write(str1)3 File_object.readline([n])6 File_object.write(str1)3 File_object.readline([n])8 File_object.readline([n])9 File_object.read([n])2 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']3 =0=1=2Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']3 File_object.write(str1)1 File_object.write(str1)88 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']2 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']3 File_object.write(str1)62 Output of Read function is Hello This is Delhi This is Paris This is London Output of Readline function is Hello Output of Read(9) function is Hello Th Output of Readline(9) function is Hello Output of Readlines function is ['Hello \n', 'This is Delhi \n', 'This is Paris \n', 'This is London \n']3 Output of Readlines after appending ['This is Delhi \n', 'This is Paris \n', 'This is London \n', 'Today \n'] Output of Readlines after writing ['Tomorrow \n']0 File_object.read([n])2 Output: Output of Readlines after appending ['This is Delhi \n', 'This is Paris \n', 'This is London \n', 'Today \n'] Output of Readlines after writing ['Tomorrow \n']
File_object.write(str1)0 File_object.write(str1)1 File_object.read([n])7 File_object.write(str1)3 File_object.write(str1)4 File_object.write(str1)5Harshit Agrawal. If you like GeeksforGeeks and would like to contribute, you can also write an article using write.geeksforgeeks.org or mail your article to . See your article appearing on the GeeksforGeeks main page and help other Geeks.
File_object.write(str1)0 File_object.write(str1)1 File_object.read([n])7 File_object.write(str1)3__1555515 WriteLines () trong Python là gì?Phương thức writeLines () ghi các mục của một danh sách vào tệp.Trường hợp các văn bản sẽ được chèn phụ thuộc vào chế độ tệp và vị trí phát trực tuyến."A": Các văn bản sẽ được chèn tại vị trí luồng tệp hiện tại, mặc định ở cuối tệp.writes the items of a list to the file. Where the texts will be inserted depends on the file mode and stream position. "a" : The texts will be inserted at the current file stream position, default at the end of the file.
Chức năng nào cho phép đọc và ghi tệp trong Python?Dưới đây là một số chức năng trong Python cho phép bạn đọc và ghi vào các tập tin:.. Đọc (): Hàm này đọc toàn bộ tệp và trả về một chuỗi .. Readline (): Hàm này đọc các dòng từ tệp đó và trả về dưới dạng chuỗi..... Readlines (): Hàm này trả về một danh sách trong đó mỗi phần tử là một dòng của tệp đó .. Đọc gì () trong Python?Phương thức python file read () Phương thức read () trả về số byte được chỉ định từ tệp.Mặc định là -1 có nghĩa là toàn bộ tệp.returns the specified number of bytes from the file. Default is -1 which means the whole file. |
