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Capture stdout/stderr in Python
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import cStringIO | |
import sys | |
class IOCapture(object): | |
def __init__(self, stdout = True, stderr = True): | |
self.captured_stdout = None | |
self.captured_stderr = None | |
if stdout: | |
self.captured_stdout = cStringIO.StringIO() | |
if stderr: | |
self.captured_stderr = cStringIO.StringIO() | |
def start(self): | |
if self.captured_stdout: | |
sys.stdout = self.captured_stdout | |
if self.captured_stderr: | |
sys.stderr = self.captured_stderr | |
return self | |
def stop(self): | |
if self.captured_stdout: | |
sys.stdout = sys.__stdout__ | |
if self.captured_stderr: | |
sys.stderr = sys.__stderr__ | |
return self | |
def captured_stdout(self): | |
self.captured_stdout.flush() | |
return self.captured_stdout.getvalue() | |
def captured_stderr(self): | |
self.captured_stderr.flush() | |
return self.captured_stderr.getvalue() | |
def close(self): | |
if self.captured_stdout: | |
self.captured_stdout.close() | |
if self.captured_stderr: | |
self.captured_stderr.close() | |
return self | |
def __enter__(self): | |
return self.start() | |
def __exit__(self, type, value, traceback): | |
self.stop().close() |
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