In an event-driven game, you need to give control back to the event
loop in order for the framework to pass events to your program. Your
main function, however, doesn't do so: you've got a while loop that
monopolizes control flow:
def game():
# ... game initialization logic
while playing:
# ... loop logic
time.sleep(speed)
This gives no opportunity to process keyboard events, since the
program is stuck within the while loop.
To resolve this, you want to set up a timer which emits a "tick" event
every so often. Essentially, if you're using a Tkinter-based
framework, you're looking for the "after" method:
http://effbot.org/tkinterbook/widget.htm#Tkinter.Widget.after-method
where your program will look something like this:
#################################
def game():
# ... game initialization logic
gameLoop();
def gameLoop():
if playing:
# ... loop logic
win.after(speed, gameLoop)
#################################
The gameLoop tells the framework to restart the game loop "after" some
time. gameLoop() then returns, and gives control back to the event
loop that was started with "win.mainloop()".
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