boB Stepp wrote:
> Win7-64bit, Python 3.6.1
>
> When I run the following code, the radiobutton window initially
> displays with *all* buttons apparently selected. However, when the
> "Status" button is clicked on, the status is as expected, an empty
> string for the checked_radiobutton StringVar().
>
>
================================================================================
> #!/usr/bin/env python3
>
> import tkinter as tk
>
> root = tk.Tk()
>
> # Report option selected:
> def status():
> print('You selected the radiobutton: %s' % checked_radiobutton.get())
> print()
>
> languages = ('Perl', 'JavaScript', 'PHP', 'Python 2', 'Python 3')
>
> # Create new variable object to keep track of checked radiobutton:
> checked_radiobutton = tk.StringVar()
>
> for language in languages:
> # Create new radiobutton:
> tk.Radiobutton(root, text=language, variable=checked_radiobutton,
> value=language).pack(anchor='w')
>
> checked_radiobutton.set('')
>
> tk.Button(root, text='Status', command=status).pack(fill='x')
>
> root.mainloop()
>
================================================================================
>
> I wish the displayed window to initially display with no button
> selected. What am I missing here?
It looks like the empty string is special. On my (linux) system all buttons
appear grayed (while a selected button would be black). Any other string
should give the desired result, probably because every button "thinks" that
another button is currently selected.
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