code: def get_dist(self):
      dist = backend_dist  # noqa: F841
      Case = namedtuple(
          "Case", tuple(name for name, _ in self.raw_params)
      )
      case = Case(  # noqa: F841
          **{
              name: eval(raw_param)
              for name, raw_param in self.raw_params
          }
      )
      with xfail_if_not_found():
          return eval(self.raw_dist)
  
imports: import re
  from collections import OrderedDict, namedtuple
  from importlib import import_module
  import numpy
  import pytest
  import funsor
  import funsor.ops
  from funsor.distribution import BACKEND_TO_DISTRIBUTIONS_BACKEND
  from funsor.interpretations import CallableInterpretation, eager, lazy, normalize, reflect
  from funsor.terms import to_data, to_funsor
  from funsor.testing import assert_close, check_funsor, excludes_backend, rand, randint, randn, random_scale_tril, xfail_if_not_found, xfail_if_not_implemented, xfail_param
  from funsor.util import get_backend
label_desc: Use image node_id 2 for calling the DistTestCase obj's underlying member method code with example usage: obj.get_dist() and returns: eval