Answers for "A value is trying to be set on a copy of a slice from a DataFrame. Try using"

SettingWithCopyWarning: A value is trying to be set on a copy of a slice from a DataFrame. Try using .loc[row_indexer,col_indexer] = value instead

import pandas as pd
pd.options.mode.chained_assignment = None  # default='warn'

Posted by: Guest on December-03-2020

settingwithcopywarning pandas

>>> df = pd.DataFrame(data=data, index=index)

>>> df.loc[mask, "z"] = 0
>>> df
    x   y   z
a   1   1   0
b   2   3  98
c   4   9   0
d   8  27   0
e  16  81  64

Posted by: Guest on February-03-2021

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