21 lines
784 B
Python
21 lines
784 B
Python
|
from pandas import Index
|
||
|
|
import pandas._testing as tm
|
||
|
|
|
||
|
|
|
||
|
|
def test_add_prefix_suffix(float_frame):
|
||
|
|
with_prefix = float_frame.add_prefix("foo#")
|
||
|
|
expected = Index([f"foo#{c}" for c in float_frame.columns])
|
||
|
|
tm.assert_index_equal(with_prefix.columns, expected)
|
||
|
|
|
||
|
|
with_suffix = float_frame.add_suffix("#foo")
|
||
|
|
expected = Index([f"{c}#foo" for c in float_frame.columns])
|
||
|
|
tm.assert_index_equal(with_suffix.columns, expected)
|
||
|
|
|
||
|
|
with_pct_prefix = float_frame.add_prefix("%")
|
||
|
|
expected = Index([f"%{c}" for c in float_frame.columns])
|
||
|
|
tm.assert_index_equal(with_pct_prefix.columns, expected)
|
||
|
|
|
||
|
|
with_pct_suffix = float_frame.add_suffix("%")
|
||
|
|
expected = Index([f"{c}%" for c in float_frame.columns])
|
||
|
|
tm.assert_index_equal(with_pct_suffix.columns, expected)
|