Earlier quoted context omitted.
The differences are described here: https://rpython.readthedocs.org/en/latest/rpython.html
Thanks but to be honest, I'm not proficient in Python, so it's hard to guess if those restrictions would hurt, although they seem fairly small. I was more asking for personnal opinions and projects using it. I wasn't able to quickly find any, it even seems pretty much nobody writes RPython code or maybe people call it Python code so googling is hard.
Looking through that list it doesn't look dreadful. There are a couple of things that jump out though - you can't use kwargs in function definitions which is probably used quite a lot in dynamic settings.
Eg in Python one might do (warning; crazy, contrived example):
def create_thing(**kwargs):
thing = dict(id=gen_id())
thing['other_data'] = kwargs
return thing
thing = create_thing(name='name', foo='bar')
An easy (more explicit) workaround would be:
def create_thing(other_data=None):
thing = dict(id=gen_id())
thing['other_data'] = other_data or {}
return thing
create_thing(dict(name='name', foo='bar'))