code: def test_when_auto_called_from_main_namespace_returns_no_attribute_error():
      from dowhy import gcm
  
      _ = gcm.auto.AssignmentQuality.GOOD
  
imports: import networkx
  import numpy
  import pandas
  import pytest
  from _pytest.python_api import approx
  from flaky import flaky
  from pytest import mark
  from sklearn.ensemble import HistGradientBoostingClassifier, HistGradientBoostingRegressor
  from sklearn.linear_model import ElasticNetCV, LassoCV, LinearRegression, LogisticRegression, RidgeCV
  from sklearn.naive_bayes import GaussianNB
  from sklearn.pipeline import Pipeline
  from dowhy.gcm import AdditiveNoiseModel, DiscreteAdditiveNoiseModel, EmpiricalDistribution, ProbabilisticCausalModel, StructuralCausalModel, draw_samples, fit
  from dowhy.gcm.auto import AssignmentQuality, assign_causal_mechanisms, has_linear_relationship
label_desc: Use image node_id 16 for calling a global function with example usage: test_when_auto_called_from_main_namespace_returns_no_attribute_error() without return types