title: Spark __getnewargs__ error ... Method or([class java.lang.String]) does not exist
body: <p>I am trying to add a column to DataFrame depending on whether column value is in another column as follow:</p>
  <pre><code>df = df.withColumn('new_column', when(df['color']=='blue' | df['color']=='green', 'A').otherwise('WD'))
  </code></pre>
  <p>after running the code I obtain the following error:</p>
  <pre><code>Py4JError: An error occurred while calling o59.or. Trace:
  py4j.Py4JException: Method or([class java.lang.String]) does not exist
      at py4j.reflection.ReflectionEngine.getMethod(ReflectionEngine.java:318)
      at py4j.reflection.ReflectionEngine.getMethod(ReflectionEngine.java:326)
      at py4j.Gateway.invoke(Gateway.java:274)
      at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
      at py4j.commands.CallCommand.execute(CallCommand.java:79)
      at py4j.GatewayConnection.run(GatewayConnection.java:214)
      at java.lang.Thread.run(Thread.java:748)
  </code></pre>
  <p>what shall I do to overcome this issue?
  I am using PySpark 2.3.0</p>