I did a quick scan of the source code I have checkout.
I see "no" as a variable in Python, PyPy, GitPython and setuptools.
Adding "no" as a keyword will break at least those projects.
Barry
Here are the details:
Python3/Lib/distutils/tests/test_util.py
249 no = ('n', 'no', 'f', 'false', 'off', '0', 'Off', 'No', 'N')
Python3/Lib/test/test_descr.py
1752 no = NoWeak()
Python3/Lib/pydoc.py
160 no = []
Python3/Lib/tkinter/messagebox.py
51 NO = "no"
setuptools/dist.py
586 no = self.negative_opt.copy()
GitPython/git/test/performance/test_commit.py
38 no = 0
pypy/rpython/translator/goal/bpnn.py
53 self.no = no
pypy/rpython/rtyper/lltypesystem/ll2ctypes.py
809 no = _opaque_objs_seen[container]
811 no = len(_opaque_objs)
pypy/rpython/jit/metainterp/test/test_warmspot.py
591 self.no = no
593 no = self.no
595 if no == 0:
597 if no == 1:
600 if no == 3:
pypy/rpython/jit/tl/tinyframe/tinyframe.py
102 no = int(arg[1:])
pypy/rpython/jit/backend/test/test_random.py
177 no = len(self.descr_counters)
201 no = len(TYPE_NAMES)
pypy/rpython/jit/backend/zarch/conditions.py
31 NO = ConditionLocation(0xe) # NO overflow
pypy/rpython/jit/backend/llsupport/jitframe.py
123 no = 0
pypy/rpython/jit/tool/traceviewer.py
77 self.no = self.counter
206 no = int(m.group(1))
pypy/rpython/tool/jitlogparser/storage.py
81 no = int(comment[len('# bridge out of Guard
0x'):].split(' ', 1)[0], 16)
86 loop.no = no
pypy/pypy/module/pypyjit/interp_resop.py
21 no = 0
> On 1 Aug 2019, at 21:06, Daniel Okey-Okoro <danielokeyok...@gmail.com> wrote:
>
> I think that adding a `no` keyword as an alias for `not` would make for more
> readable, simple, pythonic code.
>
> Take the below:
>
> ```
> if not val:
> do_thing_because_value_is_falsy()
> ```
>
> could be (is actually understood as):
>
> ```
> if no val:
> do_thing_because_value_is_falsy()
> ```
>
> I think this PEP is a work-around for an underlying subtle issue with how the
> `not` operator is used.
>
> It has two use-cases:
>
> 1. as a NOT gate for producing opposite boolean values
>
> ```
> opposite = not regular
> ```
>
> 2. as a sort of ".is_falsy()" checker; when used with an if statement.
>
> like the first example.
>
>
> This PEP would make the difference between the two usecases explicit.
>
> Thoughts?
>
> Best Intentions,
> Daniel Okey-Okoro.
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