CODEWITHSUNDEEP
pythonlistloops
elcunyado
elcunyado

Reputation: 361

Make a list of first item in every element of a dictionary

I am working with a dictionary from a file with an import. This is the dictionary:

[{'id': 76001,
  'full_name': 'Alaa Abdelnaby',
  'first_name': 'Alaa',
  'last_name': 'Abdelnaby',
  'is_active': False},
 {'id': 76002,
  'full_name': 'Zaid Abdul-Aziz',
  'first_name': 'Zaid',
  'last_name': 'Abdul-Aziz',
  'is_active': False},
 {'id': 76003,
  'full_name': 'Kareem Abdul-Jabbar',
  'first_name': 'Kareem',
  'last_name': 'Abdul-Jabbar',
  'is_active': False}]

What I want to do is get a list out of all the IDs:

player_ids = [76001,76002, 76003]

I have tried:

player_ids = []
for i in player_dict:
    player_ids.append(player_dict[i]['id'])

but I get the error

TypeError: list indices must be integers or slices, not dict

So I get that 'i' is not the place but the actual item I am calling in the dictionary? But I'm not able to make much sense of this based on what I have read.

Upvotes: 0

Views: 97

Answers (4)

Bram Dekker
Bram Dekker

Reputation: 649

The pythonic way to do this is with a list comprehension. For example:

player_ids = [dict['id'] for dict in player_dict]

This basically loops over all dictionaries in the player_dict, which is actually a list in your case, and for every dictionary gets the item with key 'id'.

Upvotes: 2

Dori
Dori

Reputation: 396

Just append

  player_ids.append(i['id'])

Upvotes: 0

Red
Red

Reputation: 27547

Here is how you can use a list comprehension:

player_dict = [{'id': 76001,
               'full_name': 'Alaa Abdelnaby',
               'first_name': 'Alaa',
               'last_name': 'Abdelnaby',
               'is_active': False},
              {'id': 76002,
               'full_name': 'Zaid Abdul-Aziz',
               'first_name': 'Zaid',
               'last_name': 'Abdul-Aziz',
               'is_active': False},
              {'id': 76003,
               'full_name': 'Kareem Abdul-Jabbar',
               'first_name': 'Kareem',
               'last_name': 'Abdul-Jabbar',
               'is_active': False}]

player_ids = [d['id'] for d in player_dict]

print(player_ids)

Output:

[76001, 76002, 76003]

Upvotes: 1

sahinakkaya
sahinakkaya

Reputation: 6056

You can try list comprehension:

>>> [d['id'] for d in my_list]
[76001, 76002, 76003]

Upvotes: 2

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