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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 _open_url(url):
 """Open a HTTP connection to the URL and return a file-like object."""

    response = requests.get(url, stream=True)
    if response.status_code != 200:
        raise IOError("Unable to download {}, HTTP {}".format(url, response.status_code))
    return response