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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 _removeIfPresent(filename):
 """Attempt to remove a file, returning whether the file existed at the time of the call. str -> bool """

    try:
        os.unlink(filename)
    except OSError as why:
        if why.errno == ENOENT:
            # Someone beat us to it, but it's gone, so that's OK
            return 0
        else:
            raise
    else:
        # File was present
        return 1