Till Korten added the comment:
I just found the following code in lines 314-320 of
[tkinter/ttk.py](https://github.com/python/cpython/blob/master/Lib/tkinter/ttk.py),
which are clearly not localization-aware:
```
def _to_number(x):
if isinstance(x, str):
if '.' in x
New submission from Till Korten :
This issue occurs when a locale is set that uses comma as decimal separator
(e.g. locale.setlocale(locale.LC_NUMERIC, 'de_DE.utf8')).
I have a tkinter.Spinbox with increment=0.1 connected to a tkinter.DoubleVar.
When I change the value of the Spinbox using
