Student: I have a question, how does Watcher execute the callback function?

[zhaojinmeng]

Student: I have a question, how does Watcher execute the callback function?

[hsluoyz]

@jessecooper @dfresh613 @Nekotoxin

[Nekotoxin]

@zhaojinmeng Hello. After set watcher for pycasbin, pycasbin will call the update function of the watcher after the polices changed. The update function will publish the message, then the subscribe thread will detected the message and call the callback function.