Complexity of list.index(x) in Python

Question

I\'m referring to this: http://docs.python.org/tutorial/datastructures.html

What would be the running time of list.index(x) function in terms of big O n

Answer 1

It's O(n), also check out: http://wiki.python.org/moin/TimeComplexity

This page documents the time-complexity (aka "Big O" or "Big Oh") of various operations in current CPython. Other Python implementations (or older or still-under development versions of CPython) may have slightly different performance characteristics. However, it is generally safe to assume that they are not slower by more than a factor of O(log n)...