code: def test_sphere():
      data = alt.sphere()
      assert data.to_dict() == {"sphere": True}
  
imports: import io
  import json
  import operator
  import os
  import pathlib
  import tempfile
  import jsonschema
  import pytest
  import pandas
  import altair.vegalite.v5
label_desc: Use image node_id 42 for calling a global function with example usage: test_sphere() without return types