In Python, most other operators have higher priority than
not, this means
gives us the result we'd expect, being True. I've had a lengthy discussion on IRC with someone stating that not has the higher priority, which it hasn't. It's very easy to observe in the example above, because
not 1 evaluates to False, and so does
False == 2. So the result of the example would be
False, which it is not. What it really does is evaluate
1 == 2, which is
False, and then not takes the opposite, which is
True.
Why am I discussing this anyway? Today, I've written a tool that converts
not foo == bar to
foo != bar,
not a in b to
a not in b,
not a not in b to
a in b and so forth. It's about 70 lines of source code that I will never understand when I re-read it, as it is full of regular expressions.
I will be releasing it to public once I've cleaned up the code a bit and decided on which license to use, meaning to choose from
MIT and
GNU GPL.
