Re: tinker Form question(s)

2020-09-07 Thread Peter Otten 
Steve wrote:

> I am not sure how to post the code for my file here, is copy/paste the
> best way?

Yes. Try to paste only the relevant parts, or, if possible, post a small 
self-contained example that can be run by the reader without further 
editing.

> Is there another? I understand that attachments are stripped
> off.
> 
> """
> The following segment of code returns values of "spec".
> I would like to have it return the associated value of
> "DataLine" with each spec. It would also be nice to understand
> how this code works to hold/return the information.
> 
> In pseudocode, a line something like:
> 
> DataReturned = DataLine + " " + spec)
> New_Specs.append(DataReturned)
> 
> explains what I would like to have returned.

>  return ([spec.get()for spec in New_Specs])

[spec.get() for spec in New_Specs]

is called "list comprehension" and is syntactic sugar for a list-creating 
loop like

result = []
for spec in New_Specs:
result.append(spec.get())


The relevant parts of the loop where you set up the GUI and the New_Specs 
list:

>  New_Specs = []
>  for lineItem in range(len(ThisList)):
>  DataLine, Spec = GetLineByItem(ThisList[y])
...
>  NewSpec = tk.StringVar()
>  New_Specs.append(NewSpec)

First, using range(len(ThisList)) is almost always superfluous as you can 
iterate over the list directly. In your case:

>  New_Specs = []
   for item in ThisList:
>  DataLine, Spec = GetLineByItem(item)
...
>  NewSpec = tk.StringVar()
>  New_Specs.append(NewSpec)

Now, as you need DataLine later-on why not keep a copy? So let's turn 
New_Specs into a list of StringVar, DataLine tuples:

>  New_Specs = []
   for item in ThisList:
>  DataLine, Spec = GetLineByItem(item)
...
>  NewSpec = tk.StringVar()
   New_Specs.append((NewSpec, DataLine))

When the function terminates (there is a mainloop() missing) you can create 
and return the result:

# long form, with a loop
result = []
for spec, dataline in New_Specs:
result.append(dataline + " " + spec.get())
return result

# alternative using a listcomp:
return [dataline + " " + spec.get() for spec, dataline in New_specs]




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tinker Form question(s)

2020-09-07 Thread Steve 
I am not sure how to post the code for my file here, is copy/paste the best
way? Is there another? I understand that attachments are stripped off.

"""
The following segment of code returns values of "spec".
I would like to have it return the associated value of
"DataLine" with each spec. It would also be nice to understand 
how this code works to hold/return the information.

In pseudocode, a line something like:

DataReturned = DataLine + " " + spec)
New_Specs.append(DataReturned)

explains what I would like to have returned.


"""
 New_Specs = []
 OldSpec = ItemID 
 NewSpec = " "
 OldLine = ItemID
 x = 3
 y = 0
 
 for lineItem in range(len(ThisList)):
 DataLine, Spec = GetLineByItem(ThisList[y])
 
 SVRlabel = ttk.Label(window, width = BoxWidth1, text = DataLine)
 SVRlabel.grid(column = 1, row = x,  sticky=tk.W)
 
 SVRlabel = ttk.Label(window, width = BoxWidth2, text = Spec)
 SVRlabel.grid(column = 2, row = x)

 NewSpec = tk.StringVar()
 New_Specs.append(NewSpec)
  
 SVRCodeEntered = ttk.Entry(window, width = BoxWidth3, textvariable
= NewSpec)
 SVRlabel = ttk.Entry(window, width = BoxWidth3, textvariable =
NewSpec)

 SVRlabel.grid(column = 3, row = x, pady = 5, sticky=tk.W)
 
 SVRCodeEntered.grid(column = 3, row = x, pady = 5, padx = 15,
sticky=tk.W)
 SVRCodeEntered.insert(0, OldSpec)
 
 x += 1 
 y += 1

 return ([spec.get()for spec in New_Specs])

==
Steve
=
Footnote:
Some mornings it just isn't worth chewing through the leather straps.


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