Python scoping

gross.py

def foo(): 
    done = [False]; 
    
    def handle_sigint(signal, frame):
        done[0] = True; 
        print("SIGINT received; stopping...")
    
    signal.signal(signal.SIGINT, handle_sigint)

    while not done[0]:
        print("not done")

wtf.py

def foo():
    done = False;
    
    def handle_sigint(signal, frame):
        done = True; 
        print("SIGINT received; stopping...")
    
    signal.signal(signal.SIGINT, handle_sigint)

    while not done:
        print("not done")