Python 迭代期间更改了字典键

Question

我有这样的字典：

     d={
         'McAfee': {'DatDate': '123','DatVersion': '456'},
         'AntiVirus': {'AVName': ['Mac Defender', 'Windows Defender'],'AVVersion': ['262144', '393472']}
       }

现在我想改变d的key，根据这个映射也改变d的value的key:

mapping_table = {"McAfee":'Mc_table','AntiVirus':'An_table'}

mapping_coulmn = {'DatDate':"Dc_column",'AVName':'Av_column','DatVersion':'Da_column','AVVersion':'AVV_column'}

输出应该是这样的：

 d={
    'Mc_table': {'Dc_column': '123','Da_column': '456'},
    'An_table': {'Av_column': ['Mac Defender', 'Windows Defender'],'AVV_column': ['262144', '393472']}
    }

我累的是：

for key in d:
    if key in mapping_table:
        new_key = mapping_table[key]
        d1[new_key]=d.pop(key)
        
print(d)

它returns一个错误：

RuntimeError: dictionary keys changed during iteration

有哪位朋友可以帮忙吗？万分感谢！

Answer 1

d = {
    mapping_table.get(k, k): {
        mapping_column.get(kk, kk): vv for kk, vv in v.items()
    }
    for k, v in d.items()
}
print(d)

打印：

{'Mc_table': {'Dc_column': '123', 'Da_column': '456'}, 
 'An_table': {'Av_column': ['Mac Defender', 'Windows Defender'], 
              'AVV_column': ['262144', '393472']}}

Python 迭代期间更改了字典键

Python dictionary keys changed during iteration

python

dictionary

key

python-3.x

python-3.5