Python “is not True” and “is False” is not the same.
x is not True will be true for any value
x that is not the singleton object
is not is its own comparison operation.
The NOT operator ! negates logical expressions so that TRUE expressions become FALSE and FALSE expressions become TRUE.
Python “is not True” same as “is False”?
Simple example code disassembled bytecode,
is not is its own comparison operation
import dis print(dis.dis("x is not True")) print(dis.dis("x is false"))
Note: IDE: PyCharm 2021.3.3 (Community Edition)
All Python Examples are in Python 3, so Maybe its different from python 2 or upgraded versions.