我有两列数据,想要使用同一字典将它们映射到一个新的单独的列中(如果字典中没有匹配的键,则返回0)。
>> codes = {'2':1,
'31':1,
'88':9,
'99':9}
>> df[['driver_action1','driver_action2']].to_dict()
{'driver_action1': {0: '1',
1: '1',
2: '77',
3: '77',
4: '1',
5: '4',
6: '2',
7: '1',
8: '77',
9: '99'},
'driver_action2': {0: '31',
1: '99',
2: '31',
3: '55',
4: '1',
5: '5',
6: '99',
7: '2',
8: '4',
9: '99'}}
我以为我只需要这样做:
但实际上:
>> df['driver_reckless_remapped'] = df[['driver_action1','driver_action2']].applymap(lambda x: codes.get(x,0))
预期输出:
driver_action1 driver_action2 driver_reckless_remapped
0 1 31 1
1 1 99 9
2 77 31 1
3 77 55 0
4 1 1 0
5 4 5 0
6 2 99 1
7 1 2 1
8 77 4 0
9 99 99 9
但是我得到的却是:
TypeError: ("'dict' object is not callable", 'occurred at index driver_action1')
有没有办法将多列映射到一个新列?