code: def _base_case(a, b, path=None, **kwargs):
      assert a == b, "%s != %s\n%s" % (a, b, _fmt_path(path))
  
file_path: datashader/datashader/datashape/util/testing.py
imports: from abc import ABC
  from ..coretypes import DataShape, DateTime, Function, Option, Record, String, Time, TimeDelta, Tuple, Units
  from ..dispatch import dispatch
label_desc: Use image node_id 4 for calling a global function with example usage: _base_case(a, b, path) without return types