On Feb 9, 2020, at 11:49, Andrew Barnert <abarn...@yahoo.com> wrote:
>
> If there isn’t a library that puts it all together the way you want
I figured there probably was, so I decided to take a look. I got a whole page
of possibly useful things, and the first one I looked at, typical, shows this
as its first example:
@typic.al
def multi(a: int, b: int):
return a + b
… which does exactly what you want here.
Meanwhile, here’s something I slapped together in however long it was from my
last email to a couple minutes before this one, to show how you could get
started in case none of the many PyPI libraries is exactly what you want:
def implicit_cast(f):
sig = inspect.signature(f)
def cast(param, arg):
typ = sig.parameters[param].annotation
if typ is sig.empty:
return arg
if isinstance(typ, str):
typ = eval(typ)
return typ(arg)
@functools.wraps(f)
def wrapper(*args, **kw):
bound = sig.bind(*args, **kw)
bound.apply_defaults()
castargs = {param: cast(param, arg)
for param, arg in bound.arguments.items()}
return f(**castargs)
return wrapper
@implicit_cast
def f(x: int, y=2, *, z) -> int:
return x+y+z_______________________________________________
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