Does the Python built-in library have an incrementable counter?-CodePudding

Is there anything like this in the Python built-in library:

class Counter:
    def __init__(self, start=0):
        self.val = start

    def consume(self):
        val = self.val
        self.val  = 1
        return val

I see this as much safer way of implementing code where a counter needs to be used and then immediately incremented on the next line. Kind of like using i in other languages. But I'm trying to avoid clogging up my library with definitions like this if there's an inbuilt method.

CodePudding user response：

You have basically reimplemented itertools.count, with consume standing in for __next__. (__next__ is not typically called directly, but by passing the instance of count to the next function.)

>>> from itertools import count
>>> c = count()
>>> next(c)
0
>>> next(c)
1
>>> next(c)
2