Inserting values from a dictionary as keys in another dictionary

Question

I have two dictionaries, and i would like to create a third where the values from number 1 becomes the keys in number 2 - i have searched alot but i think since my second dictionary is in a nested form i have not seemed to find an example. I am new to python, which maybe is why i have searched for the wrong things, and i hoped that posting here could help me solve it.

dict1 = {0: '123', 1: '456', 2:'789'}


dict 2 = 
{0: [{'id': 'abcd',
   'ocid': '134'},
  {'id': 'efgh',
   'ocid': '154'}],
1: {'id': 'rfgh',
   'ocid': '654'},
  {'id': 'kjil',
   'ocid': '874'}],
2: {'id': 'bgsj',
   'ocid': '840'},
  {'id': 'ebil',
   'ocid': '261'}]}

My desired output is: 

dict3 = 
{123: [{'id': 'abcd',
   'ocid': '134'},
  {'id': 'efgh',
   'ocid': '154'}],
456: {'id': 'rfgh',
   'ocid': '654'},
  {'id': 'kjil',
   'ocid': '874'}],
789: {'id': 'bgsj',
   'ocid': '840'},
  {'id': 'ebil',
   'ocid': '261'}]} ```

Since dictionary entries aren't necessarily in any defined order… how do you want to map values from one to specific positions in the other…? Or don't you care about the particular order? — deceze
– deceze ♦, Commented Dec 9, 2021 at 14:29
@deceze int(dict1[k]) for an exact match to OPs expected output :) — Adam.Er8
– Adam.Er8, Commented Dec 9, 2021 at 14:33

Emiliano Viotti · Accepted Answer · 2021-12-09 14:43:38Z

1

As long as the two dictionaries are the same length and in the expected order to make the matches, you can iterate through the pairs of values in both dictionaries as follows:

keys = dict1.values()  # Get values from dict1
values = dict2.values()  # Get values from dict2

dict3 = {}  # Init new dict

# Iterate over tuples (dict1_value, dict2_value)
for key, value in zip(keys, values): 
   dict3[key] = value  # Use dict1_value as key and dict2_value as value

EDIT

Extending my original answer with @deceze suggestion for the case when key in both dictionaries can be used to perform the matches:

dict3 = {dict1[k]: v for k, v in dict2.items()}

I hope this works for you!

edited Dec 9, 2021 at 14:43

answered Dec 9, 2021 at 14:31

Emiliano Viotti

1,7192 gold badges18 silver badges32 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

c marie Over a year ago

thank you so much, it is precisely what i wanted! :)

Collectives™ on Stack Overflow

Inserting values from a dictionary as keys in another dictionary

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related