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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(self):
 		""" 		The cache entry's URL. The URL is constructed from the 		values of the scheme, host, and path attributes. Assigning 		a value to the URL attribute causes the value to be parsed 		and the scheme, host and path attributes updated. 		"""

		return urlparse.urlunparse((self.scheme, self.host, self.path, None, None, None))