code: def schema():
      # OrderedDict for python 3.5 compatibility
      return OrderedDict(
          [
              ("B", "binary"),
              ("C", "categorical:5"),
              (True, "binary"),
              (0, "categorical:3"),
              ((0, 1), "continuous"),
          ]
      )
  
imports: from collections import OrderedDict
  import pytest
  from causalnex.structure import StructureModel
  from causalnex.structure.categorical_variable_mapper import VariableFeatureMapper, validate_schema
label_desc: Use image node_id 1 for calling a global function with example usage: schema() and returns: OrderedDict