Question

I have a function creating entries via grid() like this: (replace while-loop with function, this should just show you what it looks like later)

from Tkinter import * 

root = Tk()

index=0

while index < 10:

     col0 = Text(root,width=20, height=1, bg='white')
     col0.grid(row=index,column=0)
     col0.insert('0.0',"name")
     col1 = Text(root,width=20, height=1, bg='white')
     col1.grid(row=index,column=1)
     col1.insert('0.0',"attribute #1")
     col2 = Text(root,width=20, height=1, bg='white')
     col2.grid(row=index,column=2)
     col2.insert('0.0',"attribute #2")
     col3 = Text(root,width=20, height=1, bg='white')
     col3.grid(row=index,column=3)
     col3.insert('0.0',"counter")
     index+=1

root.mainloop()

so on special events the function is called and creates a new entry (a new row). but if there is already an entry for this event, i just want to increase the counter.

the eventnames and their entryrows (index) are saved in a dictionary, so i do have the row and column, but how can i actually access col3 now?

i planned to get the counter via col3.get(), but it is called col3 in every row, so how could i specify it?

is it alternatively possible to put col0,col1,col2 etc into a kind of structure (like a dictionary), so access them via col0[name].insert()… (name is unique)? i tried that but that did not work out (which does not mean its impossible i hope, i am just quite new to python)

does anyone have any suggestions or solutions to my problem?

Answer 1

You need to save references to all the Text widgets that you create:

colHeaders = ["name", "attribute #1", "attribute #2", "counter"]
myTextWidgets = []
for index in range(10):
    subList = []
    for i, header in enumerate(colHeaders):
        text = Text(root,width=20, height=1, bg='white')
        text.grid(row=index,column=i)
        text.insert('0.0',header)
        subList.append(text)
    myTextWidgets.append(subList)

This would allow you to access each widget by it’s row/column:

myTextWidgets[0][1].config(bg="purple")

You could easily append a new row to this structure like so:

subList = []
for i, header in enumerate(colHeaders):
    text = Text(root,width=20, height=1, bg='white')
    text.grid(row=len(myTextWidgets),column=i)
    text.insert('0.0', header)
    subList.append(text)
myTextWidgets.append(subList)

With this structure, it’s not the names that are unique, but the positions of each cell.