pip install blinker

from blinker import signal
 
# 定義一個(gè)信號(hào)
s = signal('king')
def animal(args):
    print('我是小鉆風(fēng)，大王回來(lái)了，我要去巡山')
# 信號(hào)注冊(cè)一個(gè)接收者
s.connect(animal)
if "__main__" == __name__:
    # 發(fā)送信號(hào)
    s.send()

from blinker import Signal
 
s = Signal()
def animal(sender):
    print('我是小鉆風(fēng)，大王回來(lái)了，我要去巡山')
s.connect(animal)
if "__main__" == __name__:
    s.send()

from blinker import signal
 
s = signal('king')
def animal_one(args):
    print(f'我是小鉆風(fēng)，今天的口號(hào)是: {args}')
def animal_two(args):
    print(f'我是大鉆風(fēng)，今天的口號(hào)是: {args}')
s.connect(animal_one)
s.connect(animal_two)
if "__main__" == __name__:
    s.send('大王叫我來(lái)巡山，抓個(gè)和尚做晚餐！')

from blinker import signal
 
s = signal('king')
def animal(args):
    print(f'我是小鉆風(fēng)，{args} 是我大哥')
s.connect(animal, sender='大象')
if "__main__" == __name__:
    for i in ['獅子', '大象', '大鵬']:
        s.send(i)

from blinker import signal
 
s = signal('king')
@s.connect
def animal_one(args):
    print(f'我是小鉆風(fēng)，今天的口號(hào)是: {args}')
def animal_two(args):
    print(f'我是大鉆風(fēng)，今天的口號(hào)是: {args}')
if "__main__" == __name__:
    s.send('大王叫我來(lái)巡山，抓個(gè)和尚做晚餐！')

from blinker import signal
s = signal('king')
@s.connect_via('大象')
def animal(args):
    print(f'我是小鉆風(fēng)，{args} 是我大哥')
if "__main__" == __name__:
    for i in ['獅子', '大象', '大鵬']:
        s.send(i)

from blinker import signal
s = signal('king')
q = signal('queue')
def animal(sender):
    print('我是小鉆風(fēng)，大王回來(lái)了，我要去巡山')
s.connect(animal)
if "__main__" == __name__:
    
    res = s.receivers
    print(res)
    if res:
        s.send()
    res = q.receivers
        q.send()
    else:
        print("孩兒們都出去巡山了")

from blinker import signal
s = signal('king')
q = signal('queue')
def animal(sender):
    print('我是小鉆風(fēng)，大王回來(lái)了，我要去巡山')
s.connect(animal)
if "__main__" == __name__:
    
    res = s.has_receivers_for(animal)
    print(res)
    res = q.has_receivers_for(animal)

from flask import Flask
app = Flask(__name__)
@app.route('/',methods=['GET','POST'],endpoint='index')
def index():
    return 'hello blinker'
 
if __name__ == '__main__':
    app.run()

from flask import Flask
from flask.signals import _signals
 
app = Flask(__name__)
s = _signals.singal('msg')
def QQ(args):
    print('you have msg from QQ')
s.connect(QQ)
@app.route('/',methods=['GET','POST'],endpoint='index')
def index():
    s.send()
    return 'hello blinker'
if __name__ == '__main__':
    app.run()

請(qǐng)求
request_started = _signals.signal('request-started')                # 請(qǐng)求到來(lái)前執(zhí)行
request_finished = _signals.signal('request-finished')              # 請(qǐng)求結(jié)束后執(zhí)行
 
模板渲染
before_render_template = _signals.signal('before-render-template')  # 模板渲染前執(zhí)行
template_rendered = _signals.signal('template-rendered')            # 模板渲染后執(zhí)行
請(qǐng)求執(zhí)行
got_request_exception = _signals.signal('got-request-exception')    # 請(qǐng)求執(zhí)行出現(xiàn)異常時(shí)執(zhí)行
request_tearing_down = _signals.signal('request-tearing-down')      # 請(qǐng)求執(zhí)行完畢后自動(dòng)執(zhí)行（無(wú)論成功與否）
appcontext_tearing_down = _signals.signal('appcontext-tearing-down') # 請(qǐng)求上下文執(zhí)行完畢后自動(dòng)執(zhí)行（無(wú)論成功與否）
請(qǐng)求上下文中
appcontext_pushed = _signals.signal('appcontext-pushed')            # 請(qǐng)求上下文push時(shí)執(zhí)行
appcontext_popped = _signals.signal('appcontext-popped')            # 請(qǐng)求上下文pop時(shí)執(zhí)行
message_flashed = _signals.signal('message-flashed')                # 調(diào)用flask在其中添加數(shù)據(jù)時(shí)，自動(dòng)觸

from flask import Flask
from flask.signals import _signals, request_started
import time
 
app = Flask(__name__)
def wechat(args):
    print('you have msg from wechat')
# 從flask中引入已經(jīng)定好的信號(hào)，注冊(cè)一個(gè)函數(shù)
request_started.connect(wechat)
@app.route('/',methods=['GET','POST'],endpoint='index')
def index():
    return 'hello blinker'
if __name__ == '__main__':
    app.run()