http://docs.python.org/tutorial/controlflow.html#tut-unpacking-arguments
* is a python reserved keyword that when placed in front of a list or tuple,
it means "Unpack this list"
** does the same, but unpacks a dictionary into variables.
so if you do something like
def afunc(var1, var2, var3, var4, var5): pass
tup = (1,2,3,4,5)
afunc(*tup)
it will actually call this instead
afunc(1,2,3,4,5)
and
d = dict(a=1, b=2, c=3)
bfunc(**d)
will actually call it like
bfunc(a=1, b=2, c=3)
You can mix and match when calling fucntions
cfunc(*tup, **d) --> cfunc(1,2,3,4,5,a=1,b=2,c=3)
-Thadeus
On Thu, Oct 29, 2009 at 10:36 AM, Chris S <sanders.ch...@gmail.com> wrote:
>
> lol, well I've been all around that. Thank you so much, works just
> fine now.
>
> Is there a quick 2-min "why that works" or somewhere you could point
> me to as to what that * means/does? Apparently I'm missing out on
> something important.
>
> On Oct 29, 10:33 am, mdipierro <mdipie...@cs.depaul.edu> wrote:
> > form=SQLFORM.factory(*[fields[num] for num in range(len(fields))])
> >
> > On Oct 29, 10:25 am, Chris S <sanders.ch...@gmail.com> wrote:
> >
> > > I've been trying to get a form built where the number of Fields are
> > > dynamic. I was successful with the plan form by using:
> > > ------------Form Implementation------------------------
> > > fields=[]
> > > for item in list:
> > > fields.append(item)
> > > fields.append(INPUT(_name=item,requires=IS_INT_IN_RANGE
> > > (0,100,error_message=('Must be an Int 0 to 100'))))
> > > fields.append(INPUT(_type='submit'))
> >
> > > form=FORM([fields[num] for num in range(len(fields))])
> > > ------------Form Implementation------------------------
> >
> > > I can append items to my form but the output in HTML is nasty.
> > > Everything is just crammed together. I read about form.custom and was
> > > going to use that approach but apparently I have to use the
> > > SQLFORM.factory() to use that. Attempting the same thing in
> > > SQLFORM.factory() looks like
> >
> > > ------------SQLFORM.factory() Implementation------------------------
> > > fields.append(Field('item1'))
> > > fields.append(Field('item2'))
> >
> > > form=SQLFORM.factory(fields[0])
> > > #This works, but obviously isn't dynamic I only get the first entry.
> >
> > > form=SQLFORM.factory(fields[num] for num in range(len(fields)))
> > > #This errors with "define_table argument is not a Field: <generator
> > > object at 0x110BD7B0>"
> > > ------------SQLFORM.factory() Implementation------------------------
> >
> > > Can anyone help me out here? I want to be able to arrange the fields
> > > in HTML like I want (which I can't seem to do with just the simple
> > > form), but I also want to be able to build the fields dynamically
> > > which I can't seem to get working with SQLFORM.factory(). I'm sure
> > > I'm missing something easy, this can't be as hard as I'm making it.
> >
> >
> >
>
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