Re: [Tutor] List of class instances
Hi, Orri Ganel wrote on 20.09.2005: >As a side-note, unless you're okay with only being able to access >those instance variables through the fields list (ie fields[0], >fields[1], fields[2]), you may want to actually name them first. Yes, I am fine with that - I actually prefer to have a sorted list instead of a dictionary. I'll always access them like for field in fields: ... Thanks, Jan -- I'd never join any club that would have the likes of me as a member. - Groucho Marx ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] List of class instances
As a side-note, unless you're okay with only being able to access those instance variables through the fields list (ie fields[0], fields[1], fields[2]), you may want to actually name them first. Jan Eden wrote: >Hi, > >Jan Eden wrote on 20.09.2005: > > > >>Hi, >> >>I'd like to form a list of class instances. The following does not work >>(TextfieldLong, Textarea, TextfieldShort etc being class names): >> >> fields = [ >> TextfieldLong(name='title', label='Seitentitel', value=''), >> Textarea(name='content', label='Inhalt', value=''), >> ShortField(name='mother_id', label='MotherID', value=1) >> ] >> >> >> > >Just found that it *does* work, but that I have to define the classes above >the list assignment. Why is that? Why would Python not find the classes within >the same file? > >TIA, > >Jan > > -- Email: singingxduck AT gmail DOT com AIM: singingxduck Programming Python for the fun of it. ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] List of class instances
Jan Eden wrote: >>I'd like to form a list of class instances. The following does not work >>(TextfieldLong, Textarea, TextfieldShort etc being class names): >> >> fields = [ >> TextfieldLong(name='title', label='Seitentitel', value=''), >> Textarea(name='content', label='Inhalt', value=''), >> ShortField(name='mother_id', label='MotherID', value=1) >> ] >> > > > Just found that it *does* work, but that I have to define the classes above > the list assignment. Why is that? Why would Python not find the classes > within the same file? Class definitions are executable statements that bind the name of the class to a class object. Before the definition is executed the class is undefined, like any other assignment. For example you wouldn't expect this to work: values = [x, y, z] x=1 y=2 z=3 Your code suffers from the same problem. When you say class foo: pass this means, roughly, foo = (the result of executing the class body) and the name 'foo' is not defined until this executes. Kent ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] List of class instances
Hi, Jan Eden wrote on 20.09.2005: >Hi, > >I'd like to form a list of class instances. The following does not work >(TextfieldLong, Textarea, TextfieldShort etc being class names): > >fields = [ >TextfieldLong(name='title', label='Seitentitel', value=''), >Textarea(name='content', label='Inhalt', value=''), >ShortField(name='mother_id', label='MotherID', value=1) >] > Just found that it *does* work, but that I have to define the classes above the list assignment. Why is that? Why would Python not find the classes within the same file? TIA, Jan -- Life's unfair - but root password helps! ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] List of class instances
Hi, I'd like to form a list of class instances. The following does not work (TextfieldLong, Textarea, TextfieldShort etc being class names): fields = [ TextfieldLong(name='title', label='Seitentitel', value=''), Textarea(name='content', label='Inhalt', value=''), ShortField(name='mother_id', label='MotherID', value=1) ] Is there a way to create such a list? Thanks in advance, Jan -- Any sufficiently advanced technology is indistinguishable from a Perl script. - Programming Perl ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
