class_docstr: Test that a keyword-based log-probability function instead of
  a positional.
class_docstr_tok: ["Test","that","a","keyword-based","log-probability","function","instead","of","a","positional","."]
code: def setUp(self):
      # Draw some data from a unit Gaussian
      self.x = np.random.randn(100)
      self.names = ["mean", "var"]
  
file_path: emcee/src/emcee/tests/unit/test_ensemble.py
imports: import string
  from unittest import TestCase
  import numpy
  import pytest
  from emcee.ensemble import EnsembleSampler, ndarray_to_list_of_dicts
label_desc: Use image node_id 4 for calling the TestNamedParameters obj's underlying member method code with example usage: obj.setUp() without return types