code: def test_init_from_list():
      g = GroupBy(["a", "c", "b"])
      assert g.order == {"a": None, "c": None, "b": None}
  
file_path: seaborn/tests/_core/test_groupby.py
imports: import numpy
  import pandas
  import pytest
  from numpy.testing import assert_array_equal
  from seaborn._core.groupby import GroupBy
label_desc: Use image node_id 2 for calling a global function with example usage: test_init_from_list() without return types