redirect_stdout

contextlib

function · Added in 3.4 (source)

redirect_stdout(new_target)

Context manager for temporarily redirecting stdout to another file.

# How to send help() to stderr
with redirect_stdout(sys.stderr):
    help(dir)

# How to write help() to a file
with open('help.txt', 'w') as f:
    with redirect_stdout(f):
        help(pow)

© Python Software Foundation. PSF License Version 2 · Official docs ↗

1 Example

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>>> from contextlib import redirect_stdout
>>> from io import StringIO
>>> stream = StringIO()
>>> write_to_stream = redirect_stdout(stream)
>>> with write_to_stream:
...     print("This is written to the stream rather than stdout")
...     with write_to_stream:
...         print("This is also written to the stream")
...
>>> print("This is written directly to stdout")
This is written directly to stdout
>>> print(stream.getvalue())
This is written to the stream rather than stdout
This is also written to the stream

from the Python docs