【python】map list for 运行时长测试

import time,sys
reps=1000
size=10000
def tester(func,*args):
starttime=time.time()
for i in range(reps):
func(*args)
spendtime=time.time()-starttime
return spendtime
def forstst():
res=[]
for x in range(size):
res.append(abs(x))
def liststst():
res=[abs(x) for x in range(size)]
def mapfunc():
res=map(abs,range(size))
def gen():
res=list(abs(x) for x in range(size))
print sys.version
tests=(forstst,liststst,mapfunc,gen)
for testfunc in tests:
print testfunc.__name__.ljust(20),'=>',tester(testfunc)
row_input()

1、测试运行时长

2、多态性的实现