我试图将数据帧中的一些空值设置为另一个值:“Non-étiquettés”
page_data_fr['Lookup_FR_tag'].loc[page_data_fr['Lookup_FR_tag'].isnull()] = page_data_fr['Lookup_FR_tag'].loc[page_data_fr['Lookup_FR_tag'].isnull()].apply(lambda x: ['Non-étiquettés'])
但是,使用上述方法设置值会导致此警告:
A value is trying to be set on a copy of a slice from a DataFrame
See the caveats in the documentation: https://pandas.pydata.org/pandas-docs/stable/user_guide/indexing.html#returning-a-view-versus-a-copy
在阅读文档并尝试调整代码后,我尝试以下操作
dfc = page_data_fr.copy()
mask = dfc['Lookup_FR_tag'].loc[page_data_fr['Lookup_FR_tag'].isnull()]
dfc['Lookup_FR_tag'].loc[mask, 'Lookup_FR_tag'] = 'Non-étiquettés'
这仍然会产生另一个错误:
ValueError: Cannot mask with non-boolean array containing NA / NaN values dfc['Lookup_FR_tag'].loc[page_data_fr['Lookup_FR_tag'].isnull()]
我也尝试过这样做,但仍然没有什么好处:
arrOfNulls = []
counter = 0
for x in dfc['Lookup_FR_tag'].isnull():
if x == True:
arrOfNulls.append(counter)
counter += 1
counter += 1
for x in range(len(arrOfNulls)):
page_data_fr['Lookup_FR_tag'][arrOfNulls[x]] = ['Non-étiquettés']
任何帮助都将不胜感激,我不确定我做错了什么,或者我是否接近
您可以这样做:
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