cool-RR <ram.rac...@gmail.com> Wrote in message: > Hi, > > I'm curious. If I append an item to a list from the left using `list.insert`, > will Python always move the entire list one item to the right (which can be > super-slow) or will it check first to see whether it can just allocate more > memory to the left of the list and put the item there, saving a lot of > resources? >
Excellent question. list does not promise better than O (1) behavior, and CPython in particular will copy, I'm pretty sure. However that's exactly what collections.deque is for. -- DaveA -- https://mail.python.org/mailman/listinfo/python-list
