How to terminate the caller fuction through callee?

[100k]

Here is my code:

def callee():
    # implement a code to stop the execution of caller()


def caller():
    callback1 = callee
    do_somthing()

callback2 = caller

Thanks in adavance.

[Gribouillis]

I suggest

def callee():
    raise RuntimeError

[jefsummers]

def callee():
    return 'Die!Die!Die!'
  
def caller():
    callback1 = callee
    if callback1 != 'Die!Die!Die!':
        do_somthing()
 
callback2 = caller