Victor Reijs wrote: > Hello all of you, > > I have problems with the visibility of variables in python. I am > used to the idea of Javascript and other languages where one can define > global variables if they are defined outside a function. It seems Python > is not doing that, but how can I make it work? > > I think it needs some twist in my mind to get used to it, but I still > don't grasp it. Can you help?
In function Do() you must add the declaration global gemetenkleur See http://www.python.org/doc/faq/programming.html#how-do-you-set-a-global-variable-in-a-function and the entry that follows it for some explanation. Kent > > I have attached a program that is not functioning as I would like to > have it functioning. > It seems that the 'gementenkleur' in funct1 and funct2 are the value of > gemetenkleur at the start of the program, but they don't chance after > the definition of gemetenkleur=bmifrao1.bmp > > I 'know' this is something particular to Python, by how can I work > around this? I could add gemetenkleur in the argument list of the funct1 > and funct2 functions, but in my case I don't want this (funct1 will be a > function to be used in scipy.fmin, and I have the idea that only the > simplex can be as an argument). > > Is there a good page on the web that described this visibility issue (or > does it have a different name?) of Python? The delveintopython.pdf does > not help me and also a tutorial of hetland.org (Instant python: > instant-python.php.htm ) seems not to speak the right language for me;-). > > Hope someone can help me. I have the idea this is essential to > understand before continuing more in Python. > > > All the best, > > > Victor > > > > > > > > ------------------------------------------------------------------------ > > bmifrao1bmp=[(41, 37, 33), (63, 56, 53), (107, 97, 92), (228, 226, 222), (81, > 64, 107), (107, 131, 82), (236, 207, 71), (158, 58, 42)] > print 'original bmifrao1bmp ',bmifrao1bmp > #gemetenkleur=[(41, 37, 33), (63, 56, 53), (107, 97, 92), (228, 226, 222), > (81, 64, 107), (107, 131, 82), (236, 207, 71), (158, 58, 42)] > gemetenkleur=[[47,46,47],[62,65,61],[116,114,114],[238,233,232],[65,62,116],[0,144,75],[245,211,0],[207,65,60]] > endkleur=[[47,46,47],[62,65,61],[116,114,114],[238,233,232],[65,62,116],[0,144,75],[245,211,0],[207,65,60]] > > > def funct1(): > print 'gemetenkleur in func1: ',gemetenkleur > a=funct2(gemetenkleur) > > def funct2(kleuren): > print 'kleuren in funct2 (should be same as gemetenkleur): ',kleuren > return 1 > > def Do(): > gemetenkleur=bmifrao1bmp[:] > print 'gemetenkleur has to be from now bmifrao1bmp: ',gemetenkleur > funct1() > > Do() > > > > > > > ------------------------------------------------------------------------ > > _______________________________________________ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
