CODEWITHSUNDEEP
pythondictionary
james hughes
james hughes

Reputation: 617

Changing all the values of a dictionary

How can I multiply all of the values in a dictionary by a set number? 

dictionary = {'one': 1, 'two': 2, 'three': 3}
number = 2

I want to multiply all of the values in dictionary by number so that a second dictionary is created called dictionary2

The dictionary created should look something like this:

dictionary2 = {'one': 2, 'two': 4 'three': 6}

Upvotes: 1

Views: 72

Answers (1)

Bhargav Rao
Bhargav Rao

Reputation: 52071

Use a dictionary comprehension

>>> dictionary = {'one': 1, 'two': 2, 'three': 3}
>>> number = 2
>>> {key:value*number for key,value in dictionary.items()}
{'one': 2, 'three': 6, 'two': 4}

(Note that the order is not the same as dictionaries are inherently unordered)

As a statement

dictionary2 = {key:value*number for key,value in dictionary.items()}

If you want a trivial version you can use a for loop

dictionary = {'one': 1, 'two': 2, 'three': 3}
number = 2
dictionary2 = {}

for i in dictionary:
    dictionary2[i] = dictionary[i]*number

print(dictionary2)

Upvotes: 7

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