How to recognize whether a script is running on a tty?

I would like my script to act differently in an interactive shell session and when running with redirected stdout (for example when piped to some other command).

How do I recognize which of these two happen in a Python script?

Example of such behavior in existing program: grep –color=auto highlights matches when running in interactive shell, but doesn’t when piped to something else.

Answers:

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Method 1

import os, sys
os.isatty(sys.stdout.fileno())

or

sys.stdout.isatty()


All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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