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inconsistency in np.isclose #7014

andyfaff opened this issue Jan 15, 2016 · 0 comments


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commented Jan 15, 2016

The documentation for np.isclose says:

Returns a boolean array of where a and b are equal within the given tolerance. If both a and b are scalars, returns a single boolean value.

This is true for comparing two finite scalars, a single boolean value is returned:

>>> np.isclose(0, 1)

However, a boolean array is returned when one or more of the scalars is non-finite:

>>> np.isclose(0, np.inf)
array([False], dtype=bool)

I would expect (from the documentation) the above to return a single boolean value, not an array. I note that both values in the last example are scalars:

>>> np.isscalar(0)
>>> np.isscalar(np.inf)
@charris charris closed this in 4d87d90 Jan 15, 2016
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