Suppress output from function

suppress_stdout_stderr.py

# Via Stack Overflow
# https://stackoverflow.com/questions/11130156/suppress-stdout-stderr-print-from-python-functions
from contextlib import contextmanager,redirect_stderr,redirect_stdout
from os import devnull

@contextmanager
def suppress_stdout_stderr():
    """A context manager that redirects stdout and stderr to devnull"""
    with open(devnull, 'w') as fnull:
        with redirect_stderr(fnull) as err, redirect_stdout(fnull) as out:
            yield (err, out)

# Example usage
import sys

def rogue_function():
    print('spam to stdout')
    print('important warning', file=sys.stderr)
    1 + 'a'
    return 42

with suppress_stdout_stderr():
    rogue_function()