What is the difference between read+ mode and write+ mode in python?

Question

Can anyone plz clarify it. Thank you.

Answer 1

The argument mode points to a string beginning with one of the following sequences (Additional characters may follow these sequences.): ``r'' Open text file for reading. The stream is positioned at the beginning of the file. ``r+'' Open for reading and writing. The stream is positioned at the beginning of the file. ``w'' Truncate file to zero length or create text file for writing. The stream is positioned at the beginning of the file. ``w+'' Open for reading and writing. The file is created if it does not exist, otherwise it is truncated. The stream is positioned at the beginning of the file. ``a'' Open for writing. The file is created if it does not exist. The stream is positioned at the end of the file. Subsequent writes to the file will always end up at the then current end of file, irrespective of any intervening or similar. ``a+'' Open for reading and writing. The file is created if it does not exist. The stream is positioned at the end of the file.

Answer 2

Both r+ and w+ opens files for read / write.
But w+ creates file if it doesn't exist.

f = open("test", "w+") creates "test" if it doesn't exist.

f = open("test", "r+") raises FileNotFound exception if 'test' doesn't exist.