()
| 56 | |
| 57 | |
| 58 | def test_map_str(): |
| 59 | # GH 2786 |
| 60 | df = DataFrame(np.random.default_rng(2).random((3, 4))) |
| 61 | df2 = df.copy() |
| 62 | cols = ["a", "a", "a", "a"] |
| 63 | df.columns = cols |
| 64 | |
| 65 | expected = df2.map(str) |
| 66 | expected.columns = cols |
| 67 | result = df.map(str) |
| 68 | tm.assert_frame_equal(result, expected) |
| 69 | |
| 70 | |
| 71 | @pytest.mark.parametrize( |