Numpy isnan() fails on an array of floats (from pandas dataframe apply)

Question

I have an array of floats (some normal numbers, some nans) that is coming out of an apply on a pandas dataframe.

For some reason, numpy.isnan is failing on this arra

Answer 1

Make sure you import csv file using Pandas

import pandas as pd

condition = pd.isnull(data[i][j])