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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 _read_file(file_name):
 """Read the file content and load it as JSON. Arguments: file_name (:py:class:`str`):
 The filename. Returns: :py:class:`dict`: The loaded JSON data. Raises: :py:class:`FileNotFoundError`: If the file is not found. """

    with open(file_name) as config_file:
        data = json.load(config_file)
    return data