code: def test_polar_twice():
      fig = plt.figure()
      plt.polar([1, 2], [0.1, 0.2])
      plt.polar([3, 4], [0.3, 0.4])
      assert len(fig.axes) == 1, "More than one polar Axes created."
  
imports: import numpy
  from numpy.testing import assert_allclose
  import pytest
  import matplotlib
  from matplotlib import pyplot
  from matplotlib.testing.decorators import image_comparison, check_figures_equal
label_desc: Use image node_id 4 for calling a global function with example usage: test_polar_twice() without return types