def addPrefixes(self, pfxs):
        if self.nsprefixes != None:
            self.nsprefixes = pfxs
        else:
            self.nsprefixes.update(pfxs)
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/web/microdom.py/Element.addPrefixes/operator `is` -> `!=`