ref: 57dbe35fb68dda4888fc4c9e8c8d0b3106a8a21c
dir: /sys/lib/python/idlelib/testcode.py/
import string def f(): a = 0 b = 1 c = 2 d = 3 e = 4 g() def g(): h() def h(): i() def i(): j() def j(): k() def k(): l() l = lambda: test() def test(): string.capwords(1) f()