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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 _extract_scexe_file(self, target_file, extract_path):
 """Extracts the scexe file. :param target_file: the firmware file to be extracted from :param extract_path: the path where extraction is supposed to happen """

    # Command to extract the smart component file.
    unpack_cmd = '--unpack=' + extract_path
    # os.path.isfile(target_file)
    cmd = [target_file, unpack_cmd]
    out, err = utils.trycmd(*cmd)