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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 cmdline(self, args=()):
 """The commandline to run this environment. :keyword args: Additional arguments to be passed to the application being invoked by the environment. """

    cmds = [self._interpreter.binary]
    cmds.append(self._pex)
    cmds.extend(args)
    return cmds