Delete many elements of list (python)

Question

I have a list L.

I can delete element i by doing:

del L[i]

But what if I have a set of non contiguous indexes to delete?

Answer 1

If your original list data can safely be turned into a set (i.e. all unique values and doesn't need to maintain order), you could also use set operations:

Lset = set(L)
newset = Lset.difference(I)

You could also maybe do something with a Bag/Multiset, though it probably isn't worth the effort. Paul McGuire's second listcomp solution is certainly best for most cases.