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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 download_file(self, url):
 """Initiate a streaming download Args: url (str):
 The url to download Returns: A tuple of the content length and the streaming response """

        response = requests.get(url, stream=True)
        response.raise_for_status()
        return (int(response.headers.get('content-length', 0)), response)