BUG: Any dtype should call square on arr ** 2 (#29392)
#29417
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* BUG: update fast_scalar_power to handle special-case squaring for any array type except object arrays * BUG: fix missing declaration * TST: add test to ensure `arr**2` calls square for structured dtypes * STY: remove whitespace * BUG: replace new variable `is_square` with direct op comparison in `fast_scalar_power` function
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Backport of #29392.
Fixes #29388.
The simplification in gh-27901 seems to have removed special casing for squares, not considering the differing behavior of
np.power(x, 2)andnp.square(x)on structured dtypes.There may be more edge cases to consider--I am looking! Also adding a test. Thanks.
BUG: update fast_scalar_power to handle special-case squaring for any array type except object arrays
BUG: fix missing declaration
TST: add test to ensure
arr**2calls square for structured dtypesSTY: remove whitespace
BUG: replace new variable
is_squarewith direct op comparison infast_scalar_powerfunction