Not really the code has an error so it could not have worked.
updown = +1
Is this meant to be
updown += 1
maybe?
Although as the error message shows you need to set it to a
valid value before incrementing it, so mayber you just meant
updown = 1 # no need for the + sign
while keyop <> 0:
And the <> form of not equal is deprecated in favour of != so
this should probably be
while keyop != 0
Or better still just
while keyop:
You forgot to create keyop in this example.
UnboundLocalError: local variable 'updown' referenced before
assignment
HTH,
--
Alan Gauld
Author of the Learn to Program web site
http://www.freenetpages.co.uk/hp/alan.gauld
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