def handle_signature(self, sig, signode):
     if ':' not in sig:
         return PyClassmember.handle_signature(self, sig, signode)
     name, descr = sig.split(':')
     name = name.strip()
     fullname, prefix = PyClassmember.handle_signature(self, name, signode)
     descr = ' (' + descr.strip() + ')'
     signode += addnodes.desc_annotation(descr, descr)
     return fullname, prefix

 def run(self):
     self.name = 'py:method'
     return PyClassmember.run(self)