~❯ python3
Python 3.6.7 (default, Oct 21 2018, 08:08:16)
[GCC 8.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from sys import stdin
>>> from sys import STDIN
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: cannot import name 'STDIN'
>>>