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J'étais foiré

zun.py

import random
def r(a, b):
    r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
try:
    r(4, 0)
except:
    print('Ki yo shi!')

Cela vous donnera le résultat souhaité, mais que faire si vous définissez sauf pour finalement?

zun_2.py

import random
def r(a, b):
    r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
try:
    r(4, 0)
finally:
    print('Ki yo shi!')

Message quand enfin

Bouse
Doco
Bouse
Bouse
Bouse
Bouse
Doco
Ki yo shi!
Traceback (most recent call last):
  File "zun_2.py", line 5, in <module>
    r(4, 0)
  File "zun_2.py", line 3, in r
    r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
  File "zun_2.py", line 3, in r
    r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
  File "zun_2.py", line 3, in r
    r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
  File "zun_2.py", line 3, in r
    r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
  File "zun_2.py", line 3, in r
    r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
  File "zun_2.py", line 3, in r
    r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
  File "zun_2.py", line 3, in r
    r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
ZeroDivisionError: division by zero

C'est un peu idiot. .. .. Cela ne change pas même si je le fais avec lambda.

zun_2.py

import random
r = lambda a,b: r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
try:
    r(4, 0)
finally:
    print('Ki yo shi!')

Une partie du résultat

Traceback (most recent call last):
  File "zun_2.py", line 4, in <module>
    r(4, 0)
  File "zun_2.py", line 2, in <lambda>
    r = lambda a,b: r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
  File "zun_2.py", line 2, in <lambda>
    r = lambda a,b: r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
  File "zun_2.py", line 2, in <lambda>
    r = lambda a,b: r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
  File "zun_2.py", line 2, in <lambda>
    r = lambda a,b: r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
  File "zun_2.py", line 2, in <lambda>
    r = lambda a,b: r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
  File "zun_2.py", line 2, in <lambda>
    r = lambda a,b: r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
  File "zun_2.py", line 2, in <lambda>
    r = lambda a,b: r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
  File "zun_2.py", line 2, in <lambda>
    r = lambda a,b: r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
  File "zun_2.py", line 2, in <lambda>
    r = lambda a,b: r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
  File "zun_2.py", line 2, in <lambda>
    r = lambda a,b: r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
  File "zun_2.py", line 2, in <lambda>
    r = lambda a,b: r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
  File "zun_2.py", line 2, in <lambda>
    r = lambda a,b: r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
  File "zun_2.py", line 2, in <lambda>
    r = lambda a,b: r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
  File "zun_2.py", line 2, in <lambda>
    r = lambda a,b: r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
  File "zun_2.py", line 2, in <lambda>
    r = lambda a,b: r(a-1, print('Bouse')) if random.random() < 0.5 else r(4, print('Doco') or 1/max(a,0))
ZeroDivisionError: division by zero

Hmmm. .. .. En parlant de cela, je me suis demandé si je pouvais appeler la fonction récursive des fonctions anonymes. http://fj.hatenablog.jp/entry/2014/06/15/032135 J'ai vu une histoire comme celle-ci, mais il semble que la performance n'est pas bonne.

Diverses versions propres:

zun_3.py

import random
r=lambda a: print('Bouse') or r(a-1) if random.random() < 0.5 else print('Doco') or a <= 0 or r(4)
r(4) or print('Ki yo shi!')

C'est une excellente chose que si <= est changé en ==, il passera sauf quand il n'y a que quatre dunes. Il devrait y avoir un débat sur la question de savoir s'il est acceptable d'admettre cinq dunes ou plus.