供卵試管嬰兒【１３７乀１９１３乀６６６９電】十年老品牌代孕機構，供卵試管嬰兒選性別，包男孩，包成功。不用中文都不讓釋出

class Foo: def init(self): self.other = None def ref(self, other): self.other = other def del(self): print('Foo instance deletion')

case 1

f = Foo() del f # you should see deletion msg here

case 2

f = Foo() g = Foo() f.ref(g) del g del f # you should see two deletion msgs here

case 3

f = Foo() g = Foo() f.ref(g) g.ref(f) # create circle refs
del f del g

you wont see any deletion msg above

import gc gc.collect()

now you will see it

def foo(): try: print('in') yield finally: print('out')

case 1

f = foo() del f

case 2

f = foo() next(f) del f