code: def allocate(self, name):
      counter = self._namespace[name]
      self._namespace[name] += 1
      return counter
  
imports: from collections import defaultdict
  from collections.abc import Iterable
  from functools import singledispatch
  import pyro
  from pyro.poutine.handlers import _make_handler
  from pyro.poutine.reentrant_messenger import ReentrantMessenger
  from pyro.poutine.runtime import effectful
label_desc: Use image node_id 3 for calling the NameScope obj's underlying member method code with example usage: obj.allocate(name) and returns: counter