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TST: Don't use 'is' on strings to avoid SyntaxWarning #33322

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Merged
jreback merged 2 commits into from
Apr 6, 2020
Merged

TST: Don't use 'is' on strings to avoid SyntaxWarning #33322

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ba94e5f
TST: Don't use 'is' on strings to avoid SyntaxWarning
rebecca-palmer Apr 6, 2020
29e5454
use isinstance
rebecca-palmer Apr 6, 2020
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11 changes: 9 additions & 2 deletions pandas/tests/frame/test_alter_axes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -234,9 +234,16 @@ def test_set_index_pass_arrays_duplicate(

# need to adapt first drop for case that both keys are 'A' --
# cannot drop the same column twice;
# use "is" because == would give ambiguous Boolean error for containers
# plain == would give ambiguous Boolean error for containers
first_drop = (
False if (keys[0] is "A" and keys[1] is "A") else drop # noqa: F632
False
if (
isinstance(keys[0], str)
and keys[0] == "A"
and isinstance(keys[1], str)
and keys[1] == "A"
)
else drop
)
# to test against already-tested behaviour, we add sequentially,
# hence second append always True; must wrap keys in list, otherwise
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