code: def check_other_than_dataframe_iter(self):
      def no_iter(_):
          return 1
  
      def bad_iter_elem(_):
          return iter([1])
  
      with self.assertRaisesRegex(
          PythonException,
          "Return type of the user-defined function should be iterator of pandas.DataFrame, "
          "but is int.",
      ):
          (
              self.spark.range(10, numPartitions=3)
              .mapInPandas(no_iter, "a int")
              .count()
          )
  
      with self.assertRaisesRegex(
          PythonException,
          "Return type of the user-defined function should be iterator of pandas.DataFrame, "
          "but is iterator of int.",
      ):
          (
              self.spark.range(10, numPartitions=3)
              .mapInPandas(bad_iter_elem, "a int")
              .count()
          )
  
imports: import os
  import shutil
  import tempfile
  import time
  import unittest
  from typing import cast
  from pyspark.sql import Row
  from pyspark.sql.functions import col, encode, lit
  from pyspark.errors import PythonException
  from pyspark.testing.sqlutils import ReusedSQLTestCase, have_pandas, have_pyarrow, pandas_requirement_message, pyarrow_requirement_message
  from pyspark.testing.utils import QuietTest, eventually
label_desc: Use image node_id 10 for calling the MapInPandasTestsMixin obj's underlying member method code with example usage: obj.check_other_than_dataframe_iter() and returns: int, iter