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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 loadFromStream(self, stream, name=None):
 """Return a WSDL instance loaded from a stream object."""

        document = DOM.loadDocument(stream)
        wsdl = WSDL()
        if name:
            wsdl.location = name
        elif hasattr(stream, 'name'):
            wsdl.location = stream.name
        wsdl.load(document)
        return wsdl