key lambda x x 1, key lambda x int x, key lambda x:len x, lambda x: 1 - x 1 - x 2, python key lambda x, lambda x:1, key lambda x:len str x, python lambda x 1, lambda x : x, f1 lambda x:x*2
key lambda x x 1. There are any references about key lambda x x 1 in here. you can look below.
key lambda x x 1
key lambda x int x
key lambda x:len x
lambda x: 1 - x 1 - x 2
python key lambda x
lambda x:1
key lambda x:len str x
python lambda x 1
lambda x : x
f1 lambda x:x*2
key lambda x x 1, key lambda x int x, key lambda x:len x, lambda x: 1 - x 1 - x 2, python key lambda x, lambda x:1, key lambda x:len str x, python lambda x 1, lambda x : x, f1 lambda x:x*2
