all Python 3osfunction

os.isatty

os — terminals and devices

Check whether a file descriptor is attached to a terminal (tty).

Syntax

os.isatty(fd)

It lets a program behave differently in a terminal and under redirection: enable colour and progress bars only for a human, write plain text to a file. For a file object sys.stdout.isatty() does the same. On Windows the console counts as a terminal, a pipe does not.

Examples

import os
r, w = os.pipe()
print(os.isatty(r))   # → False
os.close(r)
os.close(w)

See also

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