parameters: (self, prefix, ns_uri)
return_statement: return ret
docstring: Register a new namespace. If @ns_uri is None it unregisters
             the namespace
docstring_summary: Register a new namespace. If
docstring_tokens: Register a new namespace . If
function: def xpathRegisterNs(self, prefix, ns_uri):
          """Register a new namespace. If @ns_uri is None it unregisters
             the namespace """
          ret = libxml2mod.xmlXPathRegisterNs(self._o, prefix, ns_uri)
          return ret
function_tokens: def xpathRegisterNs ( self , prefix , ns_uri ) : ret = libxml2mod . xmlXPathRegisterNs ( self . _o , prefix , ns_uri ) return ret