code: def test_token_env_CircleViz(monkeypatch, data):
      """Viz can get token from environment if not specified"""
      monkeypatch.setenv("MAPBOX_ACCESS_TOKEN", TOKEN)
      viz = CircleViz(data, color_property="Avg Medicare Payments")
      assert TOKEN in viz.create_html()
  
imports: import os
  import json
  import base64
  import random
  from mock import patch
  import pytest
  from mapboxgl.viz import *
  from mapboxgl.errors import TokenError, LegendError
  from mapboxgl.utils import create_color_stops, create_numeric_stops
  from matplotlib.pyplot import imread
label_desc: Use image node_id 8 for calling a global function with example usage: test_token_env_CircleViz(monkeypatch, data) without return types