Created
September 26, 2013 10:25
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redirect std stream to file stream
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import os | |
import sys | |
class RedirectStdStreams(object): | |
def __init__(self, stdout=None, stderr=None): | |
self._stdout = stdout or sys.stdout | |
self._stderr = stderr or sys.stderr | |
def __enter__(self): | |
self.old_stdout, self.old_stderr = sys.stdout, sys.stderr | |
self.old_stdout.flush(); self.old_stderr.flush() | |
sys.stdout, sys.stderr = self._stdout, self._stderr | |
def __exit__(self, exc_type, exc_value, traceback): | |
self._stdout.flush(); self._stderr.flush() | |
sys.stdout = self.old_stdout | |
sys.stderr = self.old_stderr | |
if __name__ == '__main__': | |
devnull = open(os.devnull, 'w') | |
print('Fubar') | |
with RedirectStdStreams(stdout=devnull, stderr=devnull): | |
print("You'll never see me") | |
print("I'm back!") |
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