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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 is_address_here(self, address):
 """ Tries to determine if the given address belongs to this module. @type address: int @param address: Memory address. @rtype: bool or None @return: C{True} if the address belongs to the module, C{False} if it doesn't, and C{None} if it can't be determined. """

        base = self.get_base()
        size = self.get_size()
        if base and size:
            return base <= address < (base + size)
        return None