Change type of elements in a list by column

[tkj80]

Apologies, I tried to reply to this last night but my internet was having issues.

Here's something close to what you want

newList = [(name, int(num), f(time)) for (name, num, time) in myList]

where f() is whatever conversion you want for time.

I believe this is preferable over mutating things in-place, as a general habit, but if memory is a concern, you could write a loop over myList in which for each sublist, you use indexes to replace the values with their relative modifications.

Thank you!
it works