code: def test_timezones():
      df = pd.DataFrame(
          {"date": ["2015-04-04 19:31:30+1:00"], "value": [3]}
      )
      df["date"] = pd.to_datetime(df["date"])
      args = dict(data_frame=df, x="date", y="value")
      out = build_dataframe(args, go.Scatter)
      assert str(out["data_frame"]["date"][0]) == str(df["date"][0])
  
imports: import plotly.express
  import plotly.graph_objects
  import numpy
  import pandas
  import pytest
  from packaging import version
  import unittest.mock
  from plotly.express._core import build_dataframe
  from pandas.testing import assert_frame_equal
label_desc: Use image node_id 21 for calling a global function with example usage: test_timezones() without return types