CODEWITHSUNDEEP
pythonpython-2.7
user3351750
user3351750

Reputation: 927

adding value to dict using keys list

Consider the scenario in which list contains key of a dict

x = {'a':{'b': 1}}
lst = ['a','c']
value = {'d': 3}

Using the keys present in the list lst is there a way to add an entry in the dict x .

Expected Result:

x = {'a': {'c': {'d': 3}, 'b': 1}}

Upvotes: 1

Views: 79

Answers (2)

MattR
MattR

Reputation: 5126

Philipp's answer is good.

But here is my attempt to give you the exact answer you expected.

x = {'a':{'b' : 1}}
lst=['a','c']
value = {'d':3}

x[lst[0]][lst[1]] = value
print(x)
>> {'a': {'c': {'d': 3}, 'b': 1}}

Upvotes: 2

Jakube
Jakube

Reputation: 3565

Use a loop an a temporary dictionary_variable:

tmp_dict = x
for key in lst[:-1]:
    tmp_dict = tmp_dict[key]
tmp_dict[lst[-1]] = value
print x

Notice, that the loop over all keys except the last one, since we need the last key for the assignment operation.

Upvotes: 1

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