docstr: Test function
docstr_tok: ["Test","function"]
code: def my_func():
      """
      Test function
      """
  
file_path: mars/mars/serialization/serializables/tests/test_field_type.py
imports: from collections import namedtuple
  from datetime import datetime, timedelta, timezone
  import numpy
  import pandas
  import pytest
  from ....core import EntityData
  from ..None import FieldTypes
label_desc: Use image node_id 1 for calling the MyClass obj's underlying member method code with example usage: obj.my_func() without return types