title: Error importing MulticlassClassificationEvaluator
body: <p>I'm learning Spark(Pyspark) and while trying to import MLLIB libraries, I came across this strange error that MulticlassClassificationEvaluator cannot be imported:</p>
  
  <pre><code>from pyspark.ml import Pipeline
  from pyspark.ml.classification import DecisionTreeClassifier
  from pyspark.ml.feature import StringIndexer, VectorIndexer
  from pyspark.mllib.util import MLUtils
  from pyspark.ml.evaluation import MulticlassClassificationEvaluator
  
  ---------------------------------------------------------------------------
  ImportError                               Traceback (most recent call last)
  &lt;ipython-input-148-0033401bce6e&gt; in &lt;module&gt;()
  4 from pyspark.mllib.util import MLUtils
  ----&gt; 5 from pyspark.ml.evaluation import MulticlassClassificationEvaluator
  
  ImportError: cannot import name MulticlassClassificationEvaluator
  </code></pre>