내용

글번호 789
작성자 heojk
작성일 2017-12-21 16:43:43
제목 Python enumerate
내용 A new built-in function, enumerate(), will make certain loops a bit clearer. enumerate(thing), where thing is either an iterator or a sequence, returns a iterator that will return (0, thing[0]), (1, thing[1]), (2, thing[2]), and so forth. A common idiom to change every element of a list looks like this: for i in range(len(L)): item = L[i] # ... compute some result based on item ... L[i] = result This can be rewritten using enumerate() as: for i, item in enumerate(L): # ... compute some result based on item ... L[i] = result