stats.P doesn't work well with ==

[Gábor Horváth]

Hi Team!

I played around a bit with sympy's stats module, and seems to me that
stats.P can't evaluate equality conditions well. Didn't debug it further,
just wondering if I'm missing something trivial here, or is this a bug?

Thanks,
Gábor

```
Python 3.11.2 (main, Apr 28 2025, 14:11:48) [GCC 12.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import sympy
>>> sympy.__version__
'1.14.0'
>>> import sympy.stats as stats
>>> D = stats.Die('D', 6)
>>> stats.P(D == 3)
0
>>> stats.P(D > 3)
1/2
>>> stats.P((D > 2) & (D < 4))
1/6
>>> stats.P((D >= 3) & (D <= 3))
1/6
>>>
```

[Aaron Meurer]

You can't use == for symbolic operations anywhere in SymPy, because ==
always does a direct structural equality check, and always results in
either True or False

>>> import sympy.stats as stats
>>> D = stats.Die('D', 6)

>>> D == 3
False

If you want to create an equality object you should use Eq(), like

>>> Eq(D, 3)
Eq(D, 3)
>>> stats.P(Eq(D, 3))
1/6

Aaron Meurer

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