rapidsai/cudf
Voir sur GitHub[FEA] Implement find_valid_index and its permutations (first_ and last_)
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#1 480 ouverte le 22 avr. 2019
Pythonfeature requestgood first issue
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Description
Is your feature request related to a problem? Please describe.
As a user, I'd like to be able to call last_valid_index or first_valid_index to get the index of the first/last non-null value in a Series.
Describe the solution you'd like I'd like to be able to do the following with cudf:
import pandas as pd
import numpy as np
ser1 = [1,2,3,4]
ser2 = [1,2,3,None]
pdf = pd.DataFrame({'a':ser1, 'b':ser2})
print(pdf.b.last_valid_index())
2
Additional context The pandas implementation is here. This will help with API compatibility.