CODEWITHSUNDEEP
pythonlist
maybettle
maybettle

Reputation: 59

How to I append elements to a list of lists in python

I've a list of lists like:

a = [[1,2], [3,4]]

To each of the lists I want to add an element like 0 at the beginning, so that the result looks like:

b = [[0,1,2], [0,3,4]]

What's the Python way to do it? I already tried it with "map", but without success. I know, I could easily do it with a loop, but what's the functional way?

Upvotes: 0

Views: 83

Answers (1)

user7711283
user7711283

Reputation:

Use list comprehension and addition of lists to get in done in one short line of code:

b = [[0]+item for item in a]

Upvotes: 5

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