Python 3.8

[mehrdadn]

Python 3.8 has inserted a new argument in the beginning of ast.arguments's constructor, breaking bombast. Demo:

$ python3.7 -c "import ast; print(ast.arguments([]).args)"
$ python3.8 -c "import ast; print(ast.arguments([]).args)"

Reason:

$ python3.7 -c "import ast; print(ast.arguments._fields)"
('args', 'vararg', 'kwonlyargs', 'kw_defaults', 'kwarg', 'defaults')
$ python3.8 -c "import ast; print(ast.arguments._fields)"
('posonlyargs', 'args', 'vararg', 'kwonlyargs', 'kw_defaults', 'kwarg', 'defaults')

Related:

• bpo-36540: PEP 570 -- Implementation python/cpython#12701
• bpo-35224: Reverse evaluation order of key: value in dict comprehensions python/cpython#14139
• bpo-37593: Swap the positions of posonlyargs and args in the constructor of ast.parameters nodes python/cpython#14778
• [3.8] bpo-37593: Swap the positions of posonlyargs and args in the constructor of ast.parameters nodes (GH-14778) python/cpython#14779

[brianhou]

Thanks for the report! I'm happy to merge any of yours or @kavigupta's PRs to fix this, just let me know.

[mehrdadn]

I think @kavigupta switched to our own fork of the repo, but in any case, feel free to merge mine (#4)! I just reopened it.

@kavigupta is it good to merge your changes too?

[kavigupta]

I had changes that probably span a couple PRs. I'll organize them then link them here