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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 track_from_file(file_object, filetype, timeout=DEFAULT_ASYNC_TIMEOUT, force_upload=False):
 """ Create a track object from a file-like object. NOTE: Does not create the detailed analysis for the Track. Call Track.get_analysis() for that. Args: file_object: a file-like Python object filetype: the file type. Supported types include mp3, ogg, wav, m4a, mp4, au force_upload: skip the MD5 shortcut path, force an upload+analysis Example: < Track > """

    if not force_upload:
        try:
            # Check if this file has already been uploaded.
            # This is much faster than uploading.
            md5 = hashlib.md5(file_object.read()).hexdigest()
            return track_from_md5(md5)
        except util.EchoNestAPIError:
            # Fall through to do a fresh upload.
            pass

    file_object.seek(0)
    return _track_from_data(file_object.read(), filetype, timeout)