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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 get_csig(self, calc=None):
 """Because we're a Python value node and don't have a real timestamp, we get to ignore the calculator and just use the value contents."""

        try:
            return self.ninfo.csig
        except AttributeError:
            pass
        contents = self.get_contents()
        self.get_ninfo().csig = contents
        return contents