python - threading.local

import time

import threading

try:    # 线程和协程都可处理

    import greenlet

    get_ident =  greenlet.getcurrent

except Exception as e:

    get_ident = threading.get_ident

class Local(object):

    """

        通过进程号/协程号的唯一标识，给每一个进程/协程开辟自己个空间，实现数据隔离

    """

    DIC = {}

    def __getattr__(self, item):

        ident = get_ident()

        if ident in self.DIC:

            return self.DIC[ident].get(item)

        return None

    def __setattr__(self, key, value):

        ident = get_ident()

        if ident in self.DIC:

            self.DIC[ident][key] = value

        else:

            self.DIC[ident] = {key: value}

obj = Local()

def fn(i):

    obj.x1 = i

    time.sleep(2)

    print(obj.x1,i)

for i in range(10):

    t = threading.Thread(target=fn,args=(i,))

    t.start()