Apr 25, 2021
4 min read
3 Facts of the Integer Caching in Python
Understand some confusing results made by Python
Python has a special feature called integer caching, or integer interning. Sometimes, it may make us confused. For example, if we run the following code on a Python shell, the results are surprising:
>>> a=256
>>> b=256
>>> a is b
True
>>> x=257
>>> y=257
>>> x is y
False
