[Tkinter] How to find what causing AttributeError: '_tkinter.tkapp' ?

[darktitan]

Yes, a bit strange? I would add a print instruction in öppna_data_filer to check that it is actually executed:

    def öppna_data_filer(self):
         self.file1 = open('partmärkning.txt', 'wt')
         self.file2 = open('kabelmärking.txt', 'wt')
         print(self.file1) 

I know that its executed by watching the file getting made.