File Handling In Python

Is “Read & Write” mode similar to that of “Write & Read” mode?
If yes then why two different modes have been mentioned instead of one?

Like in any other programming languages you can open a file in r+, w+ and a+ modes.

r+ opens for reading and writing (no truncating, file pointer at the beginning)
w+ opens for writing (and thus truncates the file) and reading
a+ opens for appending (writing without truncating, only at the end of the file, and the file pointer is at the end of the file) and reading

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