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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 exit_and_fail(self, msg=None, out=None):
 """Exits the runtime with a nonzero exit code, indicating failure. :param msg: A string message to print to stderr or another custom file desciptor before exiting. (Optional) :param out: The file descriptor to emit `msg` to. (Optional) """

    self.exit(result=PANTS_FAILED_EXIT_CODE, msg=msg, out=out)