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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 _DecodeURL(self, url):
 """Decodes the URL, replaces %XX to their corresponding characters. Args: url (str):
 encoded URL. Returns: str: decoded URL. """

    if not url:
      return ''

    decoded_url = urlparse.unquote(url)
    if isinstance(decoded_url, py2to3.BYTES_TYPE):
      try:
        decoded_url = decoded_url.decode('utf-8')
      except UnicodeDecodeError as exception:
        decoded_url = decoded_url.decode('utf-8', errors='replace')
        logger.warning(
            'Unable to decode URL: {0:s} with error: {1!s}'.format(
                url, exception))

    return decoded_url