CODEWITHSUNDEEP
pythondictionarytypeskey-valuemultiplication
Lopez
Lopez

Reputation: 472

Python - Multiply Dictionary Values where type is not String

Suppose that I have dictionary as follows

res = {'a':[10, 20, 3.9, 'NA', 'NA', 2.2]}

I want to multiply the dictionary values with a scalar only where the type is not string.

I've tried multiplying using the following code

res['a'] * 10.2

Expected Output

scalar = 10.2

res = {'a':[102, 204, 39.78, 'NA', 'NA', 22.44]}

Upvotes: 0

Views: 85

Answers (1)

j1-lee
j1-lee

Reputation: 13939

You can use isinstance to detect which are non-strings, and then use ...if...else... to apply * 10.2 to those elements:

res = {'a':[10, 20, 3.9, 'NA', 'NA', 2.2]}

res['a'] = [x * 10.2 if not isinstance(x, str) else x for x in res['a']]
print(res) # {'a': [102.0, 204.0, 39.779999999999994, 'NA', 'NA', 22.44]}

If you want to "positively" check whether an element is a number, then you can use if isinstance(x, (float, int)) instead.

Upvotes: 3

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