code: def test_sequence():
      data = alt.sequence(100)
      assert data.to_dict() == {"sequence": {"start": 0, "stop": 100}}
  
      data = alt.sequence(5, 10)
      assert data.to_dict() == {"sequence": {"start": 5, "stop": 10}}
  
      data = alt.sequence(0, 1, 0.1, as_="x")
      assert data.to_dict() == {
          "sequence": {"start": 0, "stop": 1, "step": 0.1, "as": "x"}
      }
  
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 40 for calling a global function with example usage: test_sequence() without return types