code: def test_errorbar_mixed_units():
      x = np.arange(10)
      y = [datetime(2020, 5, i * 2 + 1) for i in x]
      fig, ax = plt.subplots()
      ax.errorbar(x, y, timedelta(days=0.5))
      fig.canvas.draw()
  
imports: from datetime import datetime, timezone, timedelta
  import platform
  from unittest.mock import MagicMock
  import matplotlib.pyplot
  from matplotlib.testing.decorators import check_figures_equal, image_comparison
  import matplotlib.units
  from matplotlib.category import UnitData
  import numpy
  import pytest
label_desc: Use image node_id 9 for calling a global function with example usage: test_errorbar_mixed_units() without return types