Capture stdout in Python

capture.py

import cStringIO
import sys

class StdoutCapture(object):
    def __init__(self):
        self.captured = cStringIO.StringIO()

    def start(self):
        sys.stdout = self.captured
        return self

    def stop(self):
        sys.stdout = sys.__stdout__
        return self

    def value(self):
        self.captured.flush()
        return self.captured.getvalue()

    def close(self):
        self.captured.close()

    def __enter__(self):
        return self.start()

    def __exit__(self, type, value, traceback):
        self.stop().close()

if __name__ == '__main__':
    # Python >= 2.5
    with StdoutCapture() as c:
        print "This text is captured."
        value = c.value()
    print "captured: %s" % value
    # Python < 2.5
    c = StdoutCapture().start()
    print "This text is captured."
    value = c.value()
    c.stop()
    print "captured: %s" % (value)