I tried to implement this in CPython by modifying a downloaded source code, but
I can't seem to fix the problem of the "maybe" operators segfaulting when being
used with literal immutables. The maybe-assign/coalesce operators were
implemented successfully though.
Many operations involving two literals are optimized (to a certain level). So
it sort of surprises me that literal comparisons are not optimized and literal
contains only convert the right operand to a constant if possible. I'd like to
implement optimizations for these especially for the
This is the convention according to my expertise:
> PascalCase: subtype of a token type, cannot be used in a `rule_name[type]:`
> definition in grammar
> lower_snake_case: a token type
PascalCase nodes are those used in the functions `_PyAST_*` (or one of the
expression contexts), while
Here's a short description:
> PascalCase: used in `_PyAST_*` nodes
> lower_snake_case: used in `*_ty` nodes
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Sorry for the two replies, I didn't think the first one would be sent.
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The code in the pull request is not updated and cannot be updated (though I
seem to have fixed the bugs in the test in my modified CPython build). It won't
merge, and I definitely believe it won't pass.
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> s = {} # new empty set
> d = {:} # new empty dictionary (the ":" is a reference to key-value pairs)
Even though this isn't python-ideas, I just want to suggest having it like this:
s = {,} # new empty set
d = {} # same syntax for new empty dictionary
Instead of the backwards-incompatible change
On Mon, Feb 7, 2022 at 5:11 PM Victor Stinner vstin...@python.org wrote:
> I made a change to require C99 "NAN" constant and I'm was
> asked to update the PEP 7 to clarify the C subset is needed to build
> Python 3.11.
What if it was built with MSVC which is usually just C90?
> Among the new major new features and changes so far:
This section of major new features should've included the addition of atomic
groups/possessive matching into the `re` module. This is a boost in regex
matching performance when the pattern doesn't need any backtracking.
> Can you provide a bpo number, please?
bpo-433030
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