code: def test_weakmethod():
      class Foo:
          def __init__(self, state):
              self.state = state
              self.method = self._method
  
          @weakmethod
          def _method(self, *args, **kwargs):
              return self.state, args, kwargs
  
      foo = Foo(42)
      assert foo.method(1, 2, 3, x=0) == (42, (1, 2, 3), {"x": 0})
  
      foo_ref = weakref.ref(foo)
      assert foo_ref() is foo
      del foo
      assert foo_ref() is None
  
imports: import weakref
  import numpy
  import pytest
  import torch
  from torch.autograd import grad
  import pyro.distributions
  from pyro.distributions import constraints
  from pyro.distributions.util import broadcast_shape, deep_to, detach, sum_leftmost, sum_rightmost, weakmethod
  from pyro.nn.module import PyroModule, PyroParam, PyroSample
  from tests.common import assert_equal
label_desc: Use image node_id 7 for calling a global function with example usage: test_weakmethod() and returns: self,  args,  kwargs