[英]pandas delete column value from other 2 columns
我有以下数据框
team team2 condition Required_Col
Australia Sri Lanka Sri Lanka Australia
Australia Sri Lanka Sri Lanka Australia
Australia Sri Lanka Sri Lanka Australia
Australia Sri Lanka Australia Sri Lanka
Australia Sri Lanka Australia Sri Lanka
我想创建Required_Col
,以便如果该值位于condition
列中,则应选择team
和team2
列中除condition
以外的其他值。 在熊猫中做到这一点的最佳方法是什么?
使用np.where
df['required'] = np.where(df.condition == df.team, df.team2, df.team)
team team2 condition required
0 Australia SriLanka SriLanka Australia
1 Australia SriLanka SriLanka Australia
2 Australia SriLanka SriLanka Australia
3 Australia SriLanka Australia SriLanka
4 Australia SriLanka Australia SriLanka
您可以使用.apply() :
df['Required_Col'] = df.apply(lambda x: x['team2'] if (x['condition']==x['team']) else x['team'], axis=1)
输出:
team team2 condition Required_Col
0 Australia SriLanka SriLanka Australia
1 Australia SriLanka SriLanka Australia
2 Australia SriLanka SriLanka Australia
3 Australia SriLanka Australia SriLanka
4 Australia SriLanka Australia SriLanka
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