introspect c-functions?
Michael Hudson
mwh at python.net
Thu Jun 6 09:33:30 EDT 2002
holger krekel <pyth at devel.trillke.net> writes:
> is there any way to introspect the *number of arguments*
> of a function implemented at c-level?
In short, no. To the runtime almost all C functions look roughly like
python functions defined like:
def func(*args):
pass
& so there is no way of telling what the function will do with the
arguments. There are others -- METH_O and METH_NOARGS style C
functions -- but I don't think you can tell them apart from Python,
and they don't cover all cases.
It's a common, but hardly universal, convention to have the first line
of the docstring be something like
func(arg1[, arg2]) -> None
so you /might/ be able to dig some info out that way -- but it's
hardly reliable.
Cheers,
M.
--
... but I'd rather not reinvent the wheel if I don't have to. On
the other hand, if the currently instantiated version of the wheel
consists of a square rock covered with moss, I might as well just
start fresh. -- Roy Smith, comp.lang.python
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