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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 string_is_url(test_str):
 """ Test to see if a string is a URL or not, defined in this case as a string for which urlparse returns a scheme component False True """

    parsed = urlparse.urlparse(test_str)
    return parsed.scheme is not None and parsed.scheme != ''