Reading and Writing Files

open() returns a file object, and is most commonly used with two arguments: open(filename, mode).

>>> f = open('workfile', 'w')

  • mode ‘r‘ when the file will only be read.
  • mode ‘w‘ for only writing (an existing file with the same name will be erased).
  • mode ‘a‘ opens the file for appending, any data written to the file is automatically added to the end.
  • mode ‘r+‘ opens the file for both reading and writing.

Read content file: the default when reading is to convert platform-specific line endings (\n on Unix, \r\n on Windows) to just \n

>>> with open('workfile') as f:
>>>          read_data =

Write text into a file

>>> f = open('workfile', 'r+')
>>> f.write('This is a test\n')