runtime error

Traceback (most recent call last): File "/home/user/app/app.py", line 5, in <module> selected_file = filedialog.askopenfile(mode='rb') File "/usr/local/lib/python3.10/tkinter/filedialog.py", line 408, in askopenfile filename = Open(**options).show() File "/usr/local/lib/python3.10/tkinter/commondialog.py", line 42, in show master = _get_temp_root() File "/usr/local/lib/python3.10/tkinter/__init__.py", line 312, in _get_temp_root root = Tk() File "/usr/local/lib/python3.10/tkinter/__init__.py", line 2299, in __init__ self.tk = _tkinter.create(screenName, baseName, className, interactive, wantobjects, useTk, sync, use) _tkinter.TclError: no display name and no $DISPLAY environment variable

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