CODEWITHSUNDEEP
pythondictionary
Kenny
Kenny

Reputation: 95

accessing a dictionary from a list of dictionaries using value

I have list of dictionaries of

a = [{'id':'1','name':'john'}, {'id':'2','name':'johns'}, {'id':'3','name':'rock'}

I want to display the dictionary of using the id value '2' to search the dictionary and the wanted output is like this

{'id':'2','name':'johns'}

How to display the dictionary to be like that?

Upvotes: 0

Views: 41

Answers (1)

Aviv Yaniv
Aviv Yaniv

Reputation: 6298

You can use list comprehension, in O(n):

a = [{'id':'1','name':'john'}, {'id':'2','name':'johns'}, {'id':'3','name':'rock'}]

# [{'id': '2', 'name': 'johns'}]
print([d for d in a if d['id'] == '2'])

However representing data as dictionary is more efficient, in O(1):

a = {'1': {'name' : 'john'}, '2': {'name' : 'johns'}, '3': {'name' : 'rock'}}

# {'name': 'johns'}
print(a['2'])

Upvotes: 2

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