<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def argsize(self):
 """The total size in bytes of all the command arguments."""

        argsize = sum(arg.nbytes for arg in self.argdefns)
        return argsize if len(self.argdefns) > 0 else 0