pythonslice

How to slice a list of lists

I have an input stream as follows:

data = [[1,234],[2,432],[3,443]]

How can I get the second element of every list? I can get the second value of a single entry by data[0][1], or every list in a range with both elements using data[0:2], but how to get just the second element from every list? Just looping through the list seems inefficient.

Solution

  • Use a list comprehension:

    [lst[1] for lst in data]