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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def monkey_patch(cls):
 """Monkey path zbarlight C extension on Read The Docs"""

        on_read_the_docs = os.environ.get('READTHEDOCS', False)
        if on_read_the_docs:
            sys.modules['zbarlight._zbarlight'] = cls