Delay the keyboard interrupt in Python for an important part of the program

Question

What is the method to delay the keyboard interrupt for an important part of the program (in my example in a cycle).

I want to download (or save) many files, and if it takes too long, I want to finish the program, when the recent file have been downloaded.

Need I to use the signal module as in the answer for Capture keyboardinterrupt in Python without try-except? Can I set a global variable to True with the signal handler and break the cycle if it is True?

The original cycle is:

for file_ in files_to_download:
    urllib.urlretrieve("".join(baseurl, file_), os.path.join(".", file_)) 

Answer 1

Something like the following may work:

# at module level (not inside class or function)
finish = False
def signal_handler(signal, frame):
    global finish
    finish = True

signal.signal(signal.SIGINT, signal_handler)

# wherever you have your file downloading code (same module)
for file_ in files_to_download:
    if finish:
        break
    urllib.urlretrieve("".join(baseurl, file_), os.path.join(".", file_))