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[英]Pandas DataFrame: SettingWithCopyWarning: A value is trying to be set on a copy of a slice from a DataFrame
[英]pandas value is trying to be set on a copy of a slice from a DataFrame
this is my code: my dataframe DF is based on this: index int64 FiscalYear int64 GL object GLID int64 GL_Debit float64 GL_Credit float64 month object Solde de fin float64
DF.sort_values(by=['GL', 'month'], inplace=True)
DF['Variation des périodes'] = DF.groupby([ 'GL'])['Solde de fin'].diff().fillna(DF['Solde de fin'])
DF = DF.rename(columns={'GL_Debit':'Débit année à date','GL_Credit':'Crédit année à date'})
for i in range(len(DF)):
row = DF.iloc[i]
teste = row['month'][5:7]
if row['month'][5:7]=='04':
if row['GL'][0] in ['4', '5', '6', '7', '8', '9']:
DF.iloc[i]['Variation des périodes'] = row['Solde de fin']
else:
DF.iloc[i]['Variation des périodes'] = row['Variation des périodes']
我有这个错误: SettingWithCopyWarning: A value is trying to be set on a slice of a copy from a DataFrame DF.iloc[i]['Variation des périodes'] = row['Solde de fin']
和
DF.iloc[i]['Variation des périodes'] 没有显示行 ['Solde de fin']
我找到了一个解决方案:用 loc 替换 bloc 并且没有警告并且值是上帝!
DF.loc[i, 'Variation des périodes'] =row['Solde de fin']
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