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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 url_decode(url):
 """ URL Decode function using REGEX **Parameters:** - **url:** URLENCODED text string **Returns:** Non URLENCODED string """

        return re.compile('%([0-9a-fA-F]{2})', re.M).sub(lambda m: chr(int(m.group(1), 16)), url)