class_docstr: The abstract base class of codecs.
docstr: Spark datatype to be used for underlying storage
docstr_tok: ["Spark","datatype","to","be","used","for","underlying","storage"]
code: def spark_dtype(self):
      """Spark datatype to be used for underlying storage"""
      raise RuntimeError("Abstract method was called")
  
imports: from abc import abstractmethod
  from io import BytesIO
  import numpy
label_desc: Use image node_id 3 for calling the DataframeColumnCodec obj's underlying member method code with example usage: obj.spark_dtype() without return types