python http://stackoverflow.com/questions/306313/pythons-is-operator-behaves-unexpectedly-with-integ

Posted 2021-05-10

>>> a = 'wata'
>>> b = 'wata'
>>> a is b
True

>>> a = 'wat?'
>>> b = 'wat?'
>>> a is b
False

>>> a, b = 'wat?', 'wat?'
>>> a is b
True

>>> a = 'wat?'; b = 'wat?'
>>> a is b
True

>>> d = {'a':1,' b': 'asdf'}
>>> dd = dict(d)
>>> d is dd
False
>>> l = [1,'2']
>>> ll = list(l)
>>> l is ll
False
>>> t = (1,'2')
>>> tt = tuple(t)
>>> t is tt
True
>>> i = 1
>>> ii = int(i)
>>> i is ii
True
>>> s = 's'
>>> ss = str(s)
>>> s is ss
True
>>>