flask LOCAL线程隔离技术

from threading import Thread
from werkzeug.local import Local

local = Local()#实例化一个线程隔离对象

request = ''

class MyThread(Thread):
    def run(self):
        global request
        request = 'abc'
        print('子线程',request)

mythread = MyThread()
mythread.start()
mythread.join()

print('主线程',request)#线程之前是共享的，要想线程隔离，就用到flask中的Local

#使用Local线程隔离会怎么样
local.request = ''

class LocalThead(Thread):
    def run(self):
        local.request = 'def'
        print('子线程',local.request)

localthead = LocalThead()
localthead.start()
localthead.join()

print('主线程',local.request)#线程完全隔离了

from threading import local #python 的多线程也有local线程隔离，只要绑定到local的属性，都是线程隔离的