code: def test_parameterdict_script_getitem(self):
      class MyModule(nn.Module):
          def __init__(self):
              super().__init__()
              self.parameter_dict = nn.ParameterDict(
                  {
                      k: nn.Parameter(torch.zeros(1))
                      for k in ["a", "b", "c"]
                  }
              )
  
          def forward(self, x):
              return (
                  self.parameter_dict["a"] * x
                  + self.parameter_dict["b"] * self.parameter_dict["c"]
              )
  
      self.checkModule(MyModule(), (torch.ones(1),))
  
imports: import os
  import sys
  from typing import Any, List, Tuple
  from collections import OrderedDict
  import torch
  import torch.nn
  from torch.testing._internal.jit_utils import JitTestCase
label_desc: Use image node_id 18 for calling the TestModuleContainers obj's underlying member method code with example usage: obj.test_parameterdict_script_getitem() and returns: unknown