class_docstr: Test the PrecisionRecallCurve visualizer
class_docstr_tok: ["Test","the","PrecisionRecallCurve","visualizer"]
docstr: Requires visualizer to be fit
docstr_tok: ["Requires","visualizer","to","be","fit"]
code: def test_ensure_fit(self):
      """
      Requires visualizer to be fit
      """
      with pytest.raises(
          NotFitted,
          match="this PrecisionRecallCurve instance is not fitted yet",
      ):
          oz = PrecisionRecallCurve(RidgeClassifier())
          oz.score(self.binary.X.test, self.binary.y.test)
  
imports: import sys
  import pytest
  import matplotlib
  from yellowbrick.exceptions import *
  from yellowbrick.classifier.prcurve import *
  from yellowbrick.datasets import load_occupancy
  from tests.base import IS_WINDOWS_OR_CONDA, VisualTestCase
  from .test_rocauc import FakeClassifier
  from sklearn.svm import LinearSVC, SVC
  from sklearn.naive_bayes import GaussianNB
  from sklearn.datasets import make_regression
  from sklearn.tree import DecisionTreeClassifier
  from sklearn.linear_model import RidgeClassifier
  from sklearn.model_selection import train_test_split
  from sklearn.ensemble import RandomForestClassifier, AdaBoostClassifier
  from sklearn.pipeline import Pipeline
  from sklearn.preprocessing import MinMaxScaler
label_desc: Use image node_id 2 for calling the TestPrecisionRecallCurve obj's underlying member method code with example usage: obj.test_ensure_fit() without return types