A new `both()` operator for matching multiple variables to one at the same time.

Currently,
```py
if a == 1 and b == 1:
    ...
```

With a `both()` operator, it can be done as follows (concept):
```py
if both(a, b) == 1:
    ...
```

Why? 
-> With the increasing number of variables, it may be hard to compare each of them at once, hence this operator can help a lot in such situations. 
Of course, using lists appropriately can solve this issue easily, but a general-direct method for achieving this would be a lot helpful. This also makes the code more simplistic and easily readable and understandable.



*Sorry for the bad formatting if markdown is not supported for this comment section, I couldn't find it mentioned anywhere in the python developer's guide. Hence I'm assuming it is supported since it's a common and highly needed feature nowadays.

I think this is a rarely needed operation. I looked through a few tens of thousand lines of my code and couldn't find anywhere it would be used.

Plus, you could write it yourself, so I don't see the advantage of it being part of the language or standard library.

Just use

    if a == b == 1:

Comparisons can be chained arbitrarily.

https://docs.python.org/3/reference/expressions.html#comparisons