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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_movielens(dest_path):
 """ Download the dataset. """


    url = 'http://files.grouplens.org/datasets/movielens/ml-100k.zip'
    req = requests.get(url, stream=True)

    with open(dest_path, 'wb') as fd:
        for chunk in req.iter_content():
            fd.write(chunk)