This will automaticly return then next integer forever it starts with 0. This is an example of how to make a generator and how to make a callable object.
Python, 17 lines
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Copy to clipboard1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | class Inc:
def __init__(self):
self.x=0
self.inc=self.giveone()
def giveone(self):
while True:
yield self.x
self.x+=1
def __call__(self):
return self.inc.next()
inc=Inc()
for x in range(10):
inc()
assert (inc()==10)==True
assert (inc()==12)==False
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I made this because I was making animated gifs. I wanted to name all the pictures in sequence and this was a nice clean way to generate the next number in the sequence. I did not need to backtrack at all so it seemed like a generator was called for. Also I did not want to call gen.next() in order to get my number.
Tags: oop
Easier... You don't benefit from using a class here.
def inc(x=0): while 1: yield x x += 1
is certainly simpler.
Batteries Included.
This is what I should have used. I obviously should look more closely at itertools.