import sys
import inspect

def tracer(frame, event, arg):
    if event == 'call':
        sys.settrace(None)
        return local_tracer

def local_tracer(frame, event, arg):
    frame.f_lineno += 1

def func():
    print(inspect.currentframe().f_lineno)
    print(inspect.currentframe().f_lineno)
    print(inspect.currentframe().f_lineno)

if __name__ == '__main__':
    sys.settrace(tracer)
    func()
    print('')
    func()