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Pass out=None with where= for masked arrays to silence numpy warning #305

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Pass out=None with where= for masked arrays to silence numpy warning #305

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8 changes: 7 additions & 1 deletion gsw/_utilities.py
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Original file line number Diff line number Diff line change
Expand Up @@ -51,7 +51,13 @@ def wrapper(*args, **kwargs):
)
where = ~mask

new_kwargs = {"where": where}
# Values under the mask are left uninitialized, which is fine for masked
# arrays; passing out=None explicitly avoids numpy's "'where' used
# without 'out'" warning. Multi-output ufuncs need one None per output.
nout = len(f.types[0].split("->")[1]) if hasattr(f, "types") else 1
out = None if nout == 1 else (None,) * nout

new_kwargs = {"where": where, "out": out}
new_kwargs.update(
**kwargs
) # Allow user override of the where kwarg if they passed it in.
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