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| 1 | +#!/usr/bin/env python3 |
| 2 | +from __future__ import print_function |
| 3 | + |
| 4 | + |
| 5 | +# nonlocal 3.x |
| 6 | +def tester(start): |
| 7 | + state = start |
| 8 | + |
| 9 | + def nested(label): |
| 10 | + nonlocal state |
| 11 | + print(label, state) |
| 12 | + state += 1 |
| 13 | + return nested |
| 14 | + |
| 15 | + |
| 16 | +# nested global 2.x, 3.x |
| 17 | +def tester1(start): |
| 18 | + global gstate |
| 19 | + gstate = start |
| 20 | + |
| 21 | + def nested(label): |
| 22 | + global gstate |
| 23 | + print(label, gstate) |
| 24 | + gstate += 1 |
| 25 | + return nested |
| 26 | + |
| 27 | + |
| 28 | +# with mutables |
| 29 | +def tester2(start): |
| 30 | + state = [start] |
| 31 | + |
| 32 | + def nested(label): |
| 33 | + print(label, state[0]) |
| 34 | + state[0] += 1 |
| 35 | + return nested |
| 36 | + |
| 37 | + |
| 38 | +# function attr |
| 39 | +def tester3(start): |
| 40 | + |
| 41 | + def nested(label): |
| 42 | + print(label, nested.state) |
| 43 | + nested.state += 1 |
| 44 | + nested.state = 0 |
| 45 | + return nested |
| 46 | + |
| 47 | + |
| 48 | +# class |
| 49 | +class tester4(object): |
| 50 | + |
| 51 | + def __init__(self, start): |
| 52 | + self.state = start |
| 53 | + |
| 54 | + def __call__(self, label): |
| 55 | + print(label, self.state) |
| 56 | + self.state += 1 |
| 57 | + |
| 58 | + |
| 59 | +if __name__ == '__main__': |
| 60 | + for test in (tester, tester1, tester2, tester3, tester4): |
| 61 | + f = test(0) |
| 62 | + f('name: %s, state:' % test.__name__) |
| 63 | + f('name: %s, state:' % test.__name__) |
| 64 | + f('name: %s, state:' % test.__name__) |
| 65 | + f('name: %s, state:' % test.__name__) |
| 66 | + print() |
| 67 | + print('done') |
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