Bob Dunakey - 6 months ago 26

Python Question

I am trying to write a boolean expression in Python, but it appears Python can only do XOR expressions with bit operations.

What would be the best way to go about writing this expression in Python without the XOR operator.

`(A ^ B ^ C ^ D) U ((B U C U D)' XOR A)`

EDIT:

I've attempted this:

`if (A and B and C and D) or ((A and not (B or C or D)) or (not A and (B and C and D))):`

and I'm looking to simplify it.

Answer

Just use the bitwise `^`

operator. Python's booleans return a boolean when `^`

-ed together:

```
>>> True ^ True
False
>>> True ^ False
True
```

The `and`

and `or`

operators exist primarily to support short-circuiting, but XOR can't short-circuit.

There's also `!=`

:

```
>>> True != True
False
>>> True != False
True
```

but that doesn't do what you want when chained with more arguments:

```
>>> True != True != True
False
```