[Tutor] Checkbuttons Variables PY_VAR

[Alan Gauld]

On 27/02/17 03:06, Pooja Bhalode wrote:
> The following code creates a list of checkboxes

It would really help uif you posted in plain text.
The HTML/RTF is getting very hard to read with
no indentation.

> ones that user wants, I am trying to add the selected variables to another
> list so that the selected variables can be accessed later in the code.
> However, when I try appending to the new list, it gets appended as PY_VAR
> instead of the variable name associated.

> keqparam = IntVar()
> delHrxnparam = IntVar()
> kfparam = IntVar()
> Afparam = IntVar()
> ksimparam = IntVar()
> Aparam = IntVar()
> RAparam = IntVar()
> RCparam = IntVar()
> 
> total_number_parameters = IntVar()
> selectedparam = []

> checkboxVars = [keqparam, delHrxnparam, kfparam, Afparam, ksimparam,
> Aparam, RAparam, RCparam]
...

> def SubmitParam():
> global total_number_parameters
> total_number_parameters = RCparam.get() + RAparam.get() + Aparam.get() +
> ksimparam.get() + Afparam.get() + kfparam.get() + delHrxnparam.get() +
> keqparam.get()
> print total_number_parameters

I assume this works OK and you see the correct value printed?

> for i in range(len(checkboxVars)):
> if checkboxVars[i].get() == 1:
> print checkboxVars[i]
> selectedparam.append(checkboxVars[i])

So here you append an IntVar object.


How does an IntVar show up in a ptrint?

>>> from Tkinter import *
>>> top = Tk()
>>> v = IntVar()
>>> print(v)
PY_VAR0

Which is what you see. You need to use get() to get the value:

>>> print v.get()
0
>>>

> however, when I try to print selectedparam, I get the following output:
> [<Tkinter.IntVar instance at 0x104829098>, <Tkinter.IntVar instance at
> 0x104829128>]
> And when I try to print out checkboxVar[i] which is just above the previous
> line, I get PY_VAR2
> PY_VAR3

Hopefully the reasons are now clear? You are seeing Python's
descriptions of the objects. To see the values you need to
use the get() method.


-- 
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.amazon.com/author/alan_gauld
Follow my photo-blog on Flickr at:
http://www.flickr.com/photos/alangauldphotos