code: def test_access_column(self):
      df = self.df
      self.assertTrue(isinstance(df.key, Column))
      self.assertTrue(isinstance(df["key"], Column))
      self.assertTrue(isinstance(df[0], Column))
      self.assertRaises(IndexError, lambda: df[2])
      self.assertRaises(AnalysisException, lambda: df["bad_key"])
      self.assertRaises(TypeError, lambda: df[{}])
  
imports: from itertools import chain
  from pyspark.sql import Column, Row
  from pyspark.sql import functions
  from pyspark.sql.types import StructType, StructField, LongType
  from pyspark.errors import AnalysisException, PySparkTypeError, PySparkValueError
  from pyspark.testing.sqlutils import ReusedSQLTestCase
label_desc: Use image node_id 7 for calling the ColumnTestsMixin obj's underlying member method code with example usage: obj.test_access_column() without return types