Phil wrote:
> Thank you for reading this.
>
> This is my first attempt at using Tkinter and I've quickly run into a
> problem.
>
> If e is a one dimensional list then all is OK and I can delete and insert
> entries. The problem comes about when the list is made two dimensional, as
> follows:
>
> from tkinter import *
>
> master = Tk()
>
> e = [None] * 6 , [None] * 2
In the above line you are creating a 2-tuple consisting of two lists:
>>> [None]*6, [None]*2
([None, None, None, None, None, None], [None, None])
What you want is a list of lists
[
[None, None],
[None, None],
...
]
You can create such a list with
>>> [[None] * 2 for _ in range(6)]
[[None, None], [None, None], [None, None], [None, None], [None, None],
[None, None]]
>
> for i in range(6):
> for j in range(2):
> e[i][j] = Entry(master, width=5)
> e[i][j].grid(row=i, column=j)
> e[i][j].insert(0,"6")
>
> mainloop( )
>
> Traceback (most recent call last):
> File "/home/pi/tkinter_example.py", line 50, in <module>
> e[i][j] = Entry(master, width=5)
> IndexError: tuple index out of range
>
> I can see that the problem occurs when i is greater than 1 which makes me
> think that my method of attempting to create a two denominational array of
> edit boxes is wrong.
>
> I've search for an example but haven't turned up anything. Where had I
> failed?
As shown above this has nothing to do with tkinter. Personally I would
create the list of list dynamically
entries = []
for row in range(6):
entries_row = []
entries.append(entries_row)
for column in range(2):
entry = Entry(master, width=5)
entry.grid(row=row, column=column)
entry.insert(0,"6")
entries_row.append(entry)
or even use a dict with (row, column) keys:
def make_entry(row, column):
entry = Entry(master, width=5)
entry.grid(row=row, column=column)
entry.insert(0,"6")
return entry
master = Tk()
entries = {
(r, c): make_entry(r, c)
for r in range(6) for c in range(2)
}
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