Reference values for exec
Hi! I'm trying to use exec in a recursive way but I have a problem When I read the manual I understand that the globals and the locals are passed by reference but if I try to use it in a recursive way the new values added in a step are not passed to the next one Could someone point me how to do that? Thanks -- Mi twitter: http://twitter.com/garito -- http://mail.python.org/mailman/listinfo/python-list
Re: Feedback wanted on programming introduction (Python in Windows)
jajajajajajajajajaja +1 for Francesco 2009/10/28 Francesco Bochicchio > > > > Just to fuel the flame war, consider a million line Python system. It's > not > > uncommon with C++. :-) > > > > In python, with one-miliion lines of code, you can demonstrate > the existence of God, and then demostrate its non-existance by > changing a single line of code :-) > > > Ciao > - > FB > -- > http://mail.python.org/mailman/listinfo/python-list > -- Mi twitter: http://twitter.com/garito -- http://mail.python.org/mailman/listinfo/python-list
Re: Reference values for exec
Perhaps but the fact is that I need to execute code from some files in the filesystem and I need to have a common stack for them 2 questions came to my mind: 1.- How can I execute code from files in the filesystem? (I choose exec for that) 2.- If exec is my only option: how can I use a common stack for them? Thanks 2009/10/28 Dave Angel > Garito wrote: > >> Hi! >> I'm trying to use exec in a recursive way but I have a problem >> >> When I read the manual I understand that the globals and the locals are >> passed by reference but if I try to use it in a recursive way the new >> values >> added in a step are not passed to the next one >> >> Could someone point me how to do that? >> >> Thanks >> >> >> > see > http://www.catb.org/~esr/faqs/smart-questions.html<http://www.catb.org/%7Eesr/faqs/smart-questions.html> > > Post some sample code, and show what doesn't work; maybe you'll get some > help that way. > > I'll point out just one thing: you cannot add new local variables at > runtime. locals() should be used to inspect, not to modify. > > See the help text: > "The contents of this dictionary should not be modified; changes may not > affect the values of local variables used by the interpreter" > > I have no idea if exec() can be safely called recursively. Most people > successfully avoid calling it at all. > > DaveA > > > -- Mi twitter: http://twitter.com/garito -- http://mail.python.org/mailman/listinfo/python-list
Re: Reference values for exec
Ok, imagine then that I need to execute code from a database query What I'm trying to do is something similar that Python Scripts in Zope. Do you know it? How can I do that? Thanks you !! 2009/10/28 Dave Angel > (You top-posted, so I almost missed your addition. It's conventional on > this newsgroup to bottom-post -- inline where appropriate, or at the end) > > > Garito wrote: > >> Perhaps but the fact is that I need to execute code from some files in the >> filesystem and I need to have a common stack for them >> >> 2 questions came to my mind: >> >> 1.- How can I execute code from files in the filesystem? (I choose exec >> for >> that) >> >> > That's what import is for. Or __import__() if you need more flexibility. > >> 2.- If exec is my only option: how can I use a common stack for them? >> >> Thanks >> >> 2009/10/28 Dave Angel >> >> >> >>> Garito wrote: >>> >>> >>> >>>> Hi! >>>> I'm trying to use exec in a recursive way but I have a problem >>>> >>>> When I read the manual I understand that the globals and the locals are >>>> passed by reference but if I try to use it in a recursive way the new >>>> values >>>> added in a step are not passed to the next one >>>> >>>> Could someone point me how to do that? >>>> >>>> Thanks >>>> >>>> >>>> >>>> >>>> >>> see >>> http://www.catb.org/~esr/faqs/smart-questions.html<http://www.catb.org/%7Eesr/faqs/smart-questions.html> >>> <http://www.catb.org/%7Eesr/faqs/smart-questions.html> >>> >>> >>> Post some sample code, and show what doesn't work; maybe you'll get some >>> help that way. >>> >>> I'll point out just one thing: you cannot add new local variables at >>> runtime. locals() should be used to inspect, not to modify. >>> >>> See the help text: >>> "The contents of this dictionary should not be modified; changes may not >>> affect the values of local variables used by the interpreter" >>> >>> I have no idea if exec() can be safely called recursively. Most people >>> successfully avoid calling it at all. >>> >>> DaveA >>> >>> >>> >>> >>> >> >> >> >> > -- Mi twitter: http://twitter.com/garito -- http://mail.python.org/mailman/listinfo/python-list
