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.venv/Lib/site-packages/pandas/tests/frame/methods/test_swapaxes.py

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+import numpy as np
+import pytest
+
+from pandas import DataFrame
+import pandas._testing as tm
+
+
+class TestSwapAxes:
+    def test_swapaxes(self):
+        df = DataFrame(np.random.randn(10, 5))
+        tm.assert_frame_equal(df.T, df.swapaxes(0, 1))
+        tm.assert_frame_equal(df.T, df.swapaxes(1, 0))
+
+    def test_swapaxes_noop(self):
+        df = DataFrame(np.random.randn(10, 5))
+        tm.assert_frame_equal(df, df.swapaxes(0, 0))
+
+    def test_swapaxes_invalid_axis(self):
+        df = DataFrame(np.random.randn(10, 5))
+        msg = "No axis named 2 for object type DataFrame"
+        with pytest.raises(ValueError, match=msg):
+            df.swapaxes(2, 5)