[visionegg] Confused about variable scope
- From: "Alex Wade" <wade@xxxxxxx>
- To: visionegg@xxxxxxxxxxxxx
- Date: Thu, 01 Apr 2004 21:45:44 -0800
I realise that this is probably more of a python thing than
a visionegg problem but...
I don't understand the way that variables scope is resolved
in, say, a controller function. Here, from the
image_sequence_fast.py example there's a bit of code that
reads:
.....
def put_image(t):
i = int(t/duration_per_image) # choose image
texture_object.put_sub_image( image_list[i] )
p.add_controller(None,None,FunctionController(during_go_func=put_image))
.....
Nothing has been declared as global. So how does
'put_image' know what, say, duration_per_image or
texture_object are?
What am I missing?
thanks in advance...
alex
A.R. Wade Ph.D.
Associate Scientist
Brain Imaging Center
The Smith-Kettlewell Eye Research Institute
2318 Fillmore Street
San Francisco, CA 94115
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