Re: Pivy problem and some other stuff
> What meaningless error message are you talking about!? > > Ciao, > Marc 'BlackJack' Rintsch My mistake. It appears that this is no longer the case. And my apologies. It was probably in version 2.3 or earlier that this was a problem. Given the way that the Python community constantly improves the language, I should have checked first, but "shoulds" don't count. -- http://mail.python.org/mailman/listinfo/python-list
Re: Pivy problem and some other stuff
On Sun, 02 Sep 2007 14:35:00 +, Zentrader wrote: > You can also use exec, but someone will tell you that the sky is going > to fall if you do. I am one of the ones who think that calling a > function with > results = [f() for f in funcs] > doesn't "work" because it gives a meaningless error message that the > calling line didn't work. What meaningless error message are you talking about!? Ciao, Marc 'BlackJack' Rintsch -- http://mail.python.org/mailman/listinfo/python-list
Re: Pivy problem and some other stuff
On Aug 30, 8:10 pm, Scott David Daniels <[EMAIL PROTECTED]> wrote: > Marc 'BlackJack' Rintsch wrote: > > A fine repy > > > In [57]: funcs = [a, b] > > In [58]: funcs > > Out[58]: [, ] > > > In [59]: funcs[0]() > > Out[59]: 1 > > > In [60]: funcs[1]() > > Out[60]: 2 > > and a "list comprehension" allows you to call these things no matter how > long the list is. > > So after the above: > >>> results = [f() for f in funcs] > >>> print results > [1, 2] You can also use exec, but someone will tell you that the sky is going to fall if you do. I am one of the ones who think that calling a function with results = [f() for f in funcs] doesn't "work" because it gives a meaningless error message that the calling line didn't work. There is already enough discussion about this, so if you use "some_string()" to call a function, wrap it in a try/except with a traceback. -- http://mail.python.org/mailman/listinfo/python-list
Re: Pivy problem and some other stuff
Look, what I think about is this. I'd like to make a multi dimensional list in which evry single element would represent a function. By looping through the list I would execute the functions. But not only that, it is possible to experiment with recoursions. the return 1 2 and 3 examples are just a examples. Of course that the thing I'm thinking about is a little bit more complex. -- http://mail.python.org/mailman/listinfo/python-list
Re: Pivy problem and some other stuff
Marc 'BlackJack' Rintsch wrote: A fine repy > In [57]: funcs = [a, b] > In [58]: funcs > Out[58]: [, ] > > In [59]: funcs[0]() > Out[59]: 1 > > In [60]: funcs[1]() > Out[60]: 2 and a "list comprehension" allows you to call these things no matter how long the list is. So after the above: >>> results = [f() for f in funcs] >>> print results [1, 2] -- http://mail.python.org/mailman/listinfo/python-list
Re: Pivy problem and some other stuff
azrael a écrit : > Hy Guys > > Did anyone manage to install and use Pivy. I'm trying it and cant come > closer to the goal I get the message: > Please set the COIN3DDIR environment variable to your Coin root > directory! ** Aborting ** > > Familiar to anyone? > I don't even know what Pivy is, but it obviously wants you to set an environment variable (how you do so depends on your environment - on most linux distros, and AFAIK on most unix systems, it's usually done in your ~/.bash_profile file) named COIN3DIR and pointing to a directory !-) -- http://mail.python.org/mailman/listinfo/python-list
Re: Pivy problem and some other stuff
On Thu, 30 Aug 2007 19:21:47 +, azrael wrote: > And there is anoher question in my mind. > Is there a way to make a list in python which contains a series of > functions. I did'n try it. Something like: Why don't you just try!? def a(): return 1 > def b(): return 2 > def c(): return 3 > def d(): return 4 > list=[a(),b(),c(),d()] list > [1,2,3,4] This isn't a list of functions but a list of results of function calls. If you want the functions in that list then leave off the parentheses, because those are the "call operator". In [55]: def a(): : return 1 : In [56]: def b(): : return 2 : In [57]: funcs = [a, b] In [58]: funcs Out[58]: [, ] In [59]: funcs[0]() Out[59]: 1 In [60]: funcs[1]() Out[60]: 2 Ciao, Marc 'BlackJack' Rintsch -- http://mail.python.org/mailman/listinfo/python-list
