On 2013-02-05, Dave Angel wrote:
> I'm no fan of Java. But it's not about a "main" method, it's about
> sharing data between functions. Most of the time non-constant globals
> are a mistake. If the data can't be passed as an argument, then it
> should probably be part of the instance data of some class. Which class
> is a design decision, and unlike Java, I wouldn't encourage writing a
> class for unrelated functions, just to bundle them together.
Well, I understand the OO principle there, but it seems practical to
accept a few global variables in the "main" code of a program.
Anyway...
> Anyway, back to your problem. Since your code doesn't have threads, it
> must have an event loop somewhere. Event loops don't coexist at all
> well with calls to sleep().
>
> while waiting:
> time.sleep(1)
>
> If you start that code with waiting being true, it will never terminate.
Right. But the following *does* work (although it's probably
offensive):
#v+
def wait_for_click(s, t):
global waiting
waiting = True
s.listen()
t.hideturtle()
t.penup()
while waiting:
t.forward(5)
t.right(5)
return
#v-
--
A lot of people never use their intiative because no-one
told them to. --- Banksy
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