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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 remove(self, transport):
 """ removes a transport from all channels to which it belongs. """

        recipients = copy.copy(self.recipients)
        for address, recManager in recipients.items():
            recManager.remove(transport)
            if not len(recManager.transports):
                del self.recipients[address]