python flask 部分源码理解

#偏函数
from functools import partial
def demo(a,*args):
    print(a)
    print(args)

par_fun = partial(demo,1)
par_fun(3,3,4,5)



线程安全（local）空间换时间

from threading import local
from threading import Thread
from time import sleep


class Foo(local):
    pass


foo = Foo()


def demo(i):
    foo.i = i
    sleep(1)
    print("------")
    print(foo.i, i)
    
    


for i in range(20):
    th = Thread(target=demo,args=(i,))
    th.start()