使用多线程发送邮件时，给线程调用的回调函数传一个user参数时 无法传入

HelloFlask Flask Web 开发实战
1

如题：使用多线程发送邮件时，给线程调用的回调函数传一个（类型为object，名字叫user）的参数时无法传入

错误信息为：

image
image952×377 54.8 KB

代码是：

from flask_mail import Message
from bigweb.extensions import mail
from threading import Thread
from flask import current_app



def send_email(app,user):

    print(user)   # 打印信息为 None

    with app.app_context():
        message = Message(subject="confirm email", recipients=[(user.username,user.email)],body="jsdjcjsdvn jkdfn jkdfn kjdf nkjfdn")
        mail.send(message)

def send_tr_email(user):

    print(user)   # 打印信息为 <User 1>

    app = current_app._get_current_object()
    # message = Message(subject="confirm email",recipients=[(user.username,user.email)],body="jsdjcjsdvn jkdfn jkdfn kjdf nkjfdn")
    tr = Thread(target=send_email,args=[app,user])
    tr.start()