class_docstr: The abstract base class of codecs.
code: def decode(self, unischema_field, value):
      raise RuntimeError("Abstract method was called")
  
imports: from abc import abstractmethod
  from io import BytesIO
  import numpy
label_desc: Use image node_id 2 for calling the DataframeColumnCodec obj's underlying member method code with example usage: obj.decode(unischema_field, value) without return types