Help "memory flag"

[krambriw]

Hi, this simple example shows how I try to keep a memory in run-time, but it doesnt work

I only want to print the first time the script runs through the while loop

Code: Select all

i = True

def MyFunc():
    if i == True:
        print "ok to print"
        i = False


ind = 1
while ind < 5:
    MyFunc()
    ind = ind + 1

Thanks a lot, Walter

[Pako]

Maybe like: http://www.eventghost.org/forum/viewtopic.php?f=2&t=496

First script (in Autostart for example):

Code: Select all

eg.globals.i=True
def MyFunc():
    if eg.globals.i == True:
        print "ok to print"
        eg.globals.i = False
        
eg.globals.MyFunc = MyFunc

And second script:

Code: Select all

ind = 1
while ind < 5:
    eg.globals.MyFunc()
    ind = ind + 1

Pako

[Bitmonster]

Everytime you execute a script ... well... you actually execute it. So if you write "i = True", then you set "i" to True on every execute, so the result isn't a surprise. But all global variables in the script live as long as the script lives and that is as long a you didn't edit or delete it.

To get the result you want, you can also use another Python trick. The first time your script starts execution, there is surely no "i" variable defined, but on the next execution "i" will be defined.

So you can write:

Code: Select all

try:
    i
except NameError:
    i = 0

print i
i += 1

The first reference to "i" (a line with just "i" will only reference this variable and nothing more) will fail on the first execution, because "i" is not defined, so Python will raise a NameError exception. On the catching code we will then set "i" to the initialization value. The next time the script is executed, "i" is defined and no exception will be raised. So "i" will still hold its last value.

[krambriw]

Once again, thanks!

Walter