[issue42750] tkinter.Variable equality consistency

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

a = tk.IntVar(name='a')
b = tk.IntVar(name='a')
assert a == b  # they refers to the same variable
assert a is not b  # but they are different objects
a.set(42); assert b.get() == a.get() == 42  # yes, it is the same variable
c = tk.IntVar(name='c', value=42)
assert c != a  # they are different variables
assert c.get() == a.get() == 42  # although having equal values
a.set(43); assert c.get() != a.get() == 43  # and setting one does not affect other

I do not see good reasons for making Tk variables comparable by value instead of name.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42750>
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