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storing variable names in a list before they are used?

If I want to have a list like this:

[(first_name, 'First Name:'), (last_name, 'Last Name:').....]

where the first part of each tuple is a variable name and the second
part is a label for the user to see, such as a form like this:

First Name: ________
Last Name: ________

(the variables would store whatever information is entered in the text
boxes to the right of each label. I'm doing it this way so I can write a
loop to construct my GUI components).

how would I go about putting these variable names in a list? I know I
can't leave them as above, but if I put them in as a string, then how do
I later "transform" them into an actual variable for assign, such as:

first_name = widget.get_text ()

Is there some kind of idiom that does this sort of work?

Sep 29 '06
10 7132
"Dennis Lee Bieber" <wl*****@ix.net com.comwrote:
On Sat, 30 Sep 2006 14:33:35 -0400, John Salerno
<jo******@NOSPA Mgmail.comdecla imed the following in comp.lang.pytho n:

Ok, I'm sure you all get the idea by now, but here's a simpler way to
look at it:

Instead of

first_name = wx.TextCtrl(sel f)
last_name = wx.TextCtrl(sel f)
job_title = wx.TextCtrl(sel f)

and subsequently:

sizer.Add(first _name)
sizer.Add(last_ name)
sizer.Add(job_t itle)

I want to do something like this:

for name in names:
name = wx.TextCtrl(sel f)

It's just that I don't know how to handle the "name" variable in the
"names" list.

Short blunt answer... You Don't
Longer, less blunt answer:

You could, if you wanted to, write:

errfile = "name_of_error_ file_for_compil e_statement"
expr = name+" = wx.TextCtrl(sel f)"
eval(compile(ex pr, errfile,'single '))

and the name that reads the same as the text string should be created.

To access it, you can then use:

sizer.Add(eval( name))


IDLE 1.1.3 ==== No Subprocess ====
Traceback (most recent call last):
File "<pyshell#0 >", line 1, in ?
NameError: name 'banana' is not defined
>>name = "banana"
errfile='errf ile'
expr = name+'="A yellow sickle shaped fruit"'
eval(compile( expr,errfile,'s ingle'))
'A yellow sickle shaped fruit'
'A yellow sickle shaped fruit'
*ducks behind asbestos shelter to hide from the predicted flames *

But Seriously - I think eval is good for just this kind of purpose - does what
was wanted, namely creating the variable with the same name as the content of a
string... - its also useful to access a variable if you have been given its name
in a string, instead of being passed the thing itself - then you don't need the
compile bit...

Caveat Emptor

- Hendrik

Oct 1 '06 #11

This thread has been closed and replies have been disabled. Please start a new discussion.

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