[issue40450] a=[1,2,3] a=a.extend([4]) after running these two lines of code a is None，but it should be [1,2,3,4]

Change by wei gu : -- title: a=[1,2,3] a=a.extend([4]) after running these two lines of code a is None，but it show be [1,2,3,4] -> a=[1,2,3] a=a.extend([4]) after running these two lines of code a is None，but it should be [1,2,3,4] ___ Pyt

[issue40450] a=[1,2,3] a=a.extend([4]) after running these two lines of code a is None，but it show be [1,2,3,4]

Change by wei gu : -- components: +Interpreter Core resolution: -> wont fix title: wrong -> a=[1,2,3] a=a.extend([4]) after running these two lines of code a is None，but it show be [1,2,3,4] type: -> behavior versions: +Python 3.5, Python 3.6, Python 3.7, Python 3.8, Python

[issue40450] wrong

Change by wei gu : -- nosy: wei gu priority: normal severity: normal status: open title: wrong ___ Python tracker <https://bugs.python.org/issue40450> ___ ___