code: def test_subplot_change_projection():
      created_axes = set()
      ax = plt.subplot()
      created_axes.add(ax)
      projections = (
          "aitoff",
          "hammer",
          "lambert",
          "mollweide",
          "polar",
          "rectilinear",
          "3d",
      )
      for proj in projections:
          ax.remove()
          ax = plt.subplot(projection=proj)
          assert ax is plt.subplot()
          assert ax.name == proj
          created_axes.add(ax)
      # Check that each call created a new Axes.
      assert len(created_axes) == 1 + len(projections)
  
imports: import difflib
  import numpy
  import sys
  from pathlib import Path
  import pytest
  import matplotlib
  from matplotlib.testing import subprocess_run_for_testing
  from matplotlib import pyplot
label_desc: Use image node_id 17 for calling a global function with example usage: test_subplot_change_projection() without return types