Merge pull request #459 from EmbraceLife/master

enable meta.delegates to enforce KEYWORD_ONLY for kwargs from

Author: jph00

fastcore/meta.py

@@ -118,7 +118,7 @@ def _f(f):
         sig = inspect.signature(from_f)
         sigd = dict(sig.parameters)
         k = sigd.pop('kwargs')
-        s2 = {k:v for k,v in inspect.signature(to_f).parameters.items()
+        s2 = {k:v.replace(kind=inspect.Parameter.KEYWORD_ONLY) for k,v in inspect.signature(to_f).parameters.items()
               if v.default != inspect.Parameter.empty and k not in sigd and k not in but}
         sigd.update(s2)
         if keep: sigd['kwargs'] = k

nbs/07_meta.ipynb

@@ -878,7 +878,7 @@
     "        sig = inspect.signature(from_f)\n",
     "        sigd = dict(sig.parameters)\n",
     "        k = sigd.pop('kwargs')\n",
-    "        s2 = {k:v for k,v in inspect.signature(to_f).parameters.items()\n",
+    "        s2 = {k:v.replace(kind=inspect.Parameter.KEYWORD_ONLY) for k,v in inspect.signature(to_f).parameters.items()\n",
     "              if v.default != inspect.Parameter.empty and k not in sigd and k not in but}\n",
     "        sigd.update(s2)\n",
     "        if keep: sigd['kwargs'] = k\n",
@@ -966,7 +966,7 @@
     "def foo(c, a, **kwargs):\n",
     "    return c + baz(a, **kwargs)\n",
     "\n",
-    "test_sig(foo, '(c, a, b=2)')\n",
+    "test_sig(foo, '(c, a, *, b=2)')\n",
     "inspect.signature(foo)"
    ]
   },
@@ -998,7 +998,7 @@
     "def foo(c, a, **kwargs):\n",
     "    return c + baz(a, **kwargs)\n",
     "\n",
-    "test_sig(foo, '(c, a, b=2, **kwargs)')\n",
+    "test_sig(foo, '(c, a, *, b=2, **kwargs)')\n",
     "inspect.signature(foo)"
    ]
   },
@@ -1030,7 +1030,7 @@
     "\n",
     "@delegates(basefoo)\n",
     "def foo(a, b=1, **kwargs): pass\n",
-    "test_sig(foo, '(a, b=1, c=2)') # e and d are not included b/c they don't have default parameters.\n",
+    "test_sig(foo, '(a, b=1, *, c=2)') # e and d are not included b/c they don't have default parameters.\n",
     "inspect.signature(foo)"
    ]
   },
@@ -1065,7 +1065,7 @@
     "@delegates(basefoo, but= ['d'])\n",
     "def foo(a, b=1, **kwargs): pass\n",
     "\n",
-    "test_sig(foo, '(a, b=1, c=2)')\n",
+    "test_sig(foo, '(a, b=1, *, c=2)')\n",
     "inspect.signature(foo)"
    ]
   },
@@ -1093,7 +1093,7 @@
     "    def bar(cls, c=3, **kwargs):\n",
     "        pass\n",
     "\n",
-    "test_sig(_T.bar, '(c=3, a=1, b=2)')"
+    "test_sig(_T.bar, '(c=3, *, a=1, b=2)')"
    ]
   },
   {
@@ -1119,7 +1119,7 @@
     "        pass\n",
     "\n",
     "t = _T()\n",
-    "test_sig(t.bar, '(c=3, a=1, b=2)')"
+    "test_sig(t.bar, '(c=3, *, a=1, b=2)')"
    ]
   },
   {
@@ -1142,7 +1142,7 @@
     "class Foo(BaseFoo):\n",
     "    def __init__(self, a, b=1, **kwargs): super().__init__(**kwargs)\n",
     "\n",
-    "test_sig(Foo, '(a, b=1, c=2)')"
+    "test_sig(Foo, '(a, b=1, *, c=2)')"
    ]
   },
   {