code: def test_numpy_labels():
      fig = px.scatter(
          x=[1, 2, 3], y=[2, 3, 4], labels={"x": "time"}
      )  # other labels will be kw arguments
      assert (
          fig.data[0]["hovertemplate"]
          == "time=%{x}<br>y=%{y}<extra></extra>"
      )
  
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 3 for calling a global function with example usage: test_numpy_labels() without return types