BUG: several nanops fail when axis==0 for 1-dimensional nan arrays · Issue #7354 · pandas-dev/pandas (original) (raw)

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Description

Several of the functions in nanops, including nanmean, nanmedian, and anything using _get_counts will crash when using a 1-dimensional all-nan array when the axis argument is set to 0.

from pandas.core import nanops import bottleneck import numpy as np nanops._USE_BOTTLENECK = False

val = np.tile(np.nan, (5,))

bottleneck.nanmean(val, axis=0) nan nanops.nanmean(val, axis=0) TypeError: 'numpy.float64' object does not support item assignment