如何更改列表内字典中的字符串键| python3.6

Question

I want to change key name 'user_id' to 'sender' as example :

[{'chat_id': 'e3c2b14ded7a32c41bf0186b6172d8e3',
  'message_id': 1,
  'user_id': 1000000},
 {'chat_id': 'e3c2b14ded7a32c41bf0186b6172d8e3',
  'message_id': 2,
  'user_id': 1000000},
 {'chat_id': 'e3c2b14ded7a32c41bf0186b6172d8e3',
  'message_id': 3,
  'user_id': 1000000},
 {'chat_id': 'e3c2b14ded7a32c41bf0186b6172d8e3',
  'message_id': 4,
  'user_id': 1000000}]

to :

[{'chat_id': 'e3c2b14ded7a32c41bf0186b6172d8e3',
  'message_id': 1,
  'sender': 1000000},
 {'chat_id': 'e3c2b14ded7a32c41bf0186b6172d8e3',
  'message_id': 2,
  'sender': 1000000},
 {'chat_id': 'e3c2b14ded7a32c41bf0186b6172d8e3',
  'message_id': 3,
  'sender': 1000000},
 {'chat_id': 'e3c2b14ded7a32c41bf0186b6172d8e3',
  'message_id': 4,
  'sender': 1000000}]

what shoud I do?

Answer 1

Just loop over the data and change the dicts appropriately assigning to the 'sender' key what you pop from 'user_id' :

for d in data:
    d['sender'] = d.pop('user_id')

Answer 2

What about without loop ?

One line Solution:

list(map(lambda x:x.__setitem__('sender',x.pop('user_id')),your_data))

data is:

your_data=[{'chat_id': 'e3c2b14ded7a32c41bf0186b6172d8e3',
  'message_id': 1,
  'user_id': 1000000},
 {'chat_id': 'e3c2b14ded7a32c41bf0186b6172d8e3',
  'message_id': 2,
  'user_id': 1000000},
 {'chat_id': 'e3c2b14ded7a32c41bf0186b6172d8e3',
  'message_id': 3,
  'user_id': 1000000},
 {'chat_id': 'e3c2b14ded7a32c41bf0186b6172d8e3',
  'message_id': 4,
  'user_id': 1000000}]

output:

[{'chat_id': 'e3c2b14ded7a32c41bf0186b6172d8e3', 'message_id': 1, 'sender': 1000000}, {'chat_id': 'e3c2b14ded7a32c41bf0186b6172d8e3', 'message_id': 2, 'sender': 1000000}, {'chat_id': 'e3c2b14ded7a32c41bf0186b6172d8e3', 'message_id': 3, 'sender': 1000000}, {'chat_id': 'e3c2b14ded7a32c41bf0186b6172d8e3', 'message_id': 4, 'sender': 1000000}]