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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 iscomplete(self, atype=None, avalue=None):
 """Check if the command is complete Check if all required arguments have been encountered. For commands that allow an undefined number of arguments, this method always returns False. :return: True if command is complete, False otherwise """

        if self.variable_args_nb:
            return False
        if self.required_args == -1:
            self.required_args = 0
            for arg in self.args_definition:
                if arg.get("required", False):
                    self.required_args += 1
        return (
            (not self.curarg or
             "extra_arg" not in self.curarg or
             ("valid_for" in self.curarg["extra_arg"] and
              atype and atype in self.curarg["extra_arg"]["type"] and
              avalue not in self.curarg["extra_arg"]["valid_for"])) and
            (self.rargs_cnt == self.required_args)
        )