indexing.py:1817: SettingWithCopyWarning: A value is trying to be set on a copy of a slice from a DataFrame [duplicate]

Question

Bonjour, I don't understand this warning.

print(data_france_malade.head(4))

date	deces	guerisons
0 2020-02-21	1.0	NaN
1 2020-02-22	1.0	NaN
2 2020-02-23	1.0	NaN
3 2020-02-24	1.0	NaN

data_france_malade.loc[0,'guerisons'] = 0

''' C:\Users\David\anaconda3\lib\site-packages\pandas\core\indexing.py:1817: 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

See the caveats in the documentation:

self._setitem_single_column(loc, value, pi)

with '''

data_france_malade['guerisons'][0] = 0.0

'''This is the same. ''' Do you have any explanation? What solution is?

enter link description here

Regards,