Add support for bitwise NOT operator

[IoIxD]

Python has ~0x3, which upon research and testing shows that this is basically the same result as Golang's "^0x3".
This adds support for that.

[nottheswimmer]

Thanks so much for contributing! I'm really ecstatic to see the first code contribution to pytago. Would you mind adding a simple test case for this in the examples folder to show off what you've made and running ./scripts/generate_readme.py then pushing?

If you create a new file (instead of adding to an existing one), you'd need to reference it from pytago/tests/test_core.py as well.

It doesn't have to be a new test case, you could just add something to the input and output of an existing examples/*.py/ examples/*.go file pair if you see an appropriate file pair to put it in.

[IoIxD]

Well I tried to do that.

bitwisenot.py

def main():
	yeah = 9
	yeah &= ~0x3
	print(yeah)

if __name__ == '__main__':
    main()

bitwise.go

package main

import "fmt"

func main() {
	yeah := 9
	yeah &= ^3
	fmt.Println(yeah)
}

generate_scripts.py gives this error:

Traceback (most recent call last):
  File "/home/gavin/Projects/pytago/scripts/generate_readme.py", line 76, in <module>
    main()
  File "/home/gavin/Projects/pytago/scripts/generate_readme.py", line 55, in main
    assert example.endswith(".go")
AssertionError

Weirdly enough, I modified the script to print file names and it seems that it actually stops at listappend...?

gavin@shitpad ~/P/pytago (yeah) [1]> python scripts/generate_readme.py
bitwisenot
listappend
Traceback (most recent call last):

[nottheswimmer]

The filenames should be the same other than the extensions, maybe that's what's wrong here? I see you have bitwisenot.py and bitwise.go. It's probably zipping through the filenames in alphabetical order which is why you're seeing it get paired with something random.

EDIT: Nevermind, I see in the PR you actually did it right (in terms of filenames), just in your message you wrote different names. I will take a look at this ASAP to see if I can figure out what's going on -- hopefully I'll find time late this evening after the Lion King musical :P

EDIT 2: Oh, I think you need to add the test to pytago/tests/test_core.py? I'm not sure if that's the entire issue but it should be there.

[IoIxD]

That was the issue yes.

[nottheswimmer]

Looks good to me! Thanks so much for the contribution!