tkinter file pattern set in a file dialog

Question

To get the set of expected files with given extensions in a file dialog, I\'ve seen in several places written patterns as (\'label\',\'pattern\'), the pattern b

Answer 1

import tkinter
options = {}
options['defaultextension'] = '.txt'
options['filetypes'] = [('all files', '.*'), ('text files', '.txt'),('asc files', '.asc')]
options['initialdir'] = '.'
file_open = tkinter.filedialog.askopenfile(mode='r', **options)