Use functools.update_wrapper

Author: james-d-mitchell

libsemigroups_pybind11/detail/cxx_wrapper.py

@@ -24,6 +24,7 @@
 from typing import Any, Callable
 from typing_extensions import Self
 from inspect import signature
+from functools import update_wrapper
 
 from _libsemigroups_pybind11 import UNDEFINED as _UNDEFINED
 
@@ -154,21 +155,14 @@ def _cxx_obj_type_from(self: Self, samples=(), types=()) -> Any:
         return lookup[cxx_types]
 
 
-def _cxx_fn_signature(cxx_mem_fn: pybind11_type) -> str:
-    return cxx_mem_fn.__doc__.split("\n")[0]
-
-
 # TODO proper annotations
 def wrap_cxx_mem_fn(cxx_mem_fn: pybind11_type) -> Callable:
     def cxx_mem_fn_wrapper(self, *args):
         return getattr(self._cxx_obj, cxx_mem_fn.__name__)(
             *(to_cxx(x) for x in args)
         )
 
-    cxx_mem_fn_wrapper.__name__ = cxx_mem_fn.__name__
-    cxx_mem_fn_wrapper.__doc__ = cxx_mem_fn.__doc__
-    cxx_mem_fn_wrapper.__signature__ = _cxx_fn_signature(cxx_mem_fn)
-
+    update_wrapper(cxx_mem_fn_wrapper, cxx_mem_fn)
     return cxx_mem_fn_wrapper
 
 
@@ -177,10 +171,7 @@ def wrap_cxx_free_fn(cxx_free_fn: pybind11_type) -> Callable:
     def cxx_free_fn_wrapper(*args):
         return cxx_free_fn(*(to_cxx(x) for x in args))
 
-    cxx_free_fn_wrapper.__name__ = cxx_free_fn.__name__
-    cxx_free_fn_wrapper.__doc__ = cxx_free_fn.__doc__
-    cxx_free_fn_wrapper.__signature__ = _cxx_fn_signature(cxx_free_fn)
-
+    update_wrapper(cxx_free_fn_wrapper, cxx_free_fn)
     return cxx_free_fn_wrapper