fixed handling of keyword-only arguments

changed more exception messages to what Py3 raises
some cleanup

tests/run/callargs.pyx

 __doc__ = u"""
-  >>> test()
+  >>> test_pos_args(h)
   1 2 3 * 0 0
+  1 2 9 * 2 0
+  1 2 7 * 2 0
+  9 8 7 * 0 0
+  7 8 9 * 0 0
+
+  >>> test_kw_args(h)
   1 2 3 * 0 0
   1 2 9 * 2 1
   1 2 7 * 2 1
   1 2 9 * 2 2
   1 2 9 * 2 2
   1 2 9 * 2 3
+
+  >>> test_kw_args(e)
+  2 1
+  5 1
+  5 1
+  5 2
+  5 2
+  5 3
+
+  >>> test_kw(e)
+  0 1
+  0 2
+  0 2
+  0 1
+
+  >>> test_kw(g)
+  1
+  2
+  2
+  1
+
+  >>> test_pos_args(f)
+  3
+  5
+  5
+  3
+  3
+
+  >>> test_noargs(e)
+  0 0
+  >>> test_noargs(f)
+  0
+  >>> test_noargs(g)
+  0
+  >>> test_noargs(h)
+  Traceback (most recent call last):
+  TypeError: h() takes at least 3 positional arguments (0 given)
 """
 
-def f(a, b, c, *args, **kwargs):
+def e(*args, **kwargs):
+    print len(args), len(kwargs)
+
+def f(*args):
+    print len(args)
+
+def g(**kwargs):
+    print len(kwargs)
+
+def h(a, b, c, *args, **kwargs):
     print a, b, c, u'*', len(args), len(kwargs)
 
 args = (9,8,7)
@@ -21,11 +73,26 @@ else:
     kwargs = {"test" : u"toast"}
 
 
-def test():
-    f(1,2,3)
+def test_kw_args(f):
     f(1,2, c=3)
     f(1,2, d=3, *args)
     f(1,2, d=3, *(7,8,9))
     f(1,2, d=3, *args, **kwargs)
     f(1,2, d=3, *args, e=5)
     f(1,2, d=3, *args, e=5, **kwargs)
+
+def test_pos_args(f):
+    f(1,2,3)
+    f(1,2, *args)
+    f(1,2, *(7,8,9))
+    f(*args)
+    f(*(7,8,9))
+
+def test_kw(f):
+    f(c=3)
+    f(d=3, e=5)
+    f(d=3, **kwargs)
+    f(**kwargs)
+
+def test_noargs(f):
+    f()

tests/run/classkwonlyargs.pyx

@@ -40,7 +40,7 @@ __doc__ = u"""
     TypeError: f() takes at most 3 positional arguments (4 given)
     >>> f(1,2)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'c' is missing
+    TypeError: f() needs keyword-only argument c
     >>> f(1,2, c=1, e=2)
     Traceback (most recent call last):
     TypeError: 'e' is an invalid keyword argument for this function
@@ -54,10 +54,10 @@ __doc__ = u"""
     TypeError: g() takes at most 3 positional arguments (4 given)
     >>> g(1,2)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'c' is missing
+    TypeError: g() needs keyword-only argument c
     >>> g(1,2, c=1)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'f' is missing
+    TypeError: g() needs keyword-only argument f
 
     >>> h(1,2, c=1, f=2)
     >>> h(1,2, c=1, f=2, e=3)
@@ -66,10 +66,10 @@ __doc__ = u"""
 
     >>> h(1,2,3)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'c' is missing
+    TypeError: h() needs keyword-only argument c
     >>> h(1,2, d=1)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'c' is missing
+    TypeError: h() needs keyword-only argument c
 
     >>> k(1,2, c=1, f=2)
     >>> k(1,2, c=1, f=2, e=3)
@@ -78,10 +78,10 @@ __doc__ = u"""
 
     >>> k(1,2,3)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'f' is missing
+    TypeError: k() needs keyword-only argument f
     >>> k(1,2, d=1)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'f' is missing
+    TypeError: k() needs keyword-only argument f
 """
 
 import sys, re

tests/run/extkwonlyargs.pyx

@@ -40,7 +40,7 @@ __doc__ = u"""
     TypeError: f() takes at most 2 positional arguments (3 given)
     >>> f(1,2)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'c' is missing
+    TypeError: f() needs keyword-only argument c
     >>> f(1,2, c=1, e=2)
     Traceback (most recent call last):
     TypeError: 'e' is an invalid keyword argument for this function
@@ -54,10 +54,10 @@ __doc__ = u"""
     TypeError: g() takes at most 2 positional arguments (3 given)
     >>> g(1,2)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'c' is missing
+    TypeError: g() needs keyword-only argument c
     >>> g(1,2, c=1)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'f' is missing
+    TypeError: g() needs keyword-only argument f
 
     >>> h(1,2, c=1, f=2)
     >>> h(1,2, c=1, f=2, e=3)
@@ -66,10 +66,10 @@ __doc__ = u"""
 
     >>> h(1,2,3)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'c' is missing
+    TypeError: h() needs keyword-only argument c
     >>> h(1,2, d=1)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'c' is missing
+    TypeError: h() needs keyword-only argument c
 
     >>> k(1,2, c=1, f=2)
     >>> k(1,2, c=1, f=2, e=3)
@@ -78,10 +78,10 @@ __doc__ = u"""
 
     >>> k(1,2,3)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'f' is missing
+    TypeError: k() needs keyword-only argument f
     >>> k(1,2, d=1)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'f' is missing
+    TypeError: k() needs keyword-only argument f
 """
 
 cdef class Ext:

tests/run/kwonlyargs.pyx

@@ -37,7 +37,7 @@ __doc__ = u"""
     TypeError: f() takes at most 2 positional arguments (3 given)
     >>> f(1,2)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'c' is missing
+    TypeError: f() needs keyword-only argument c
     >>> f(1,2, c=1, e=2)
     Traceback (most recent call last):
     TypeError: 'e' is an invalid keyword argument for this function
@@ -51,10 +51,10 @@ __doc__ = u"""
     TypeError: g() takes at most 2 positional arguments (3 given)
     >>> g(1,2)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'c' is missing
+    TypeError: g() needs keyword-only argument c
     >>> g(1,2, c=1)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'f' is missing
+    TypeError: g() needs keyword-only argument f
 
     >>> h(1,2, c=1, f=2)
     >>> h(1,2, c=1, f=2, e=3)
@@ -63,10 +63,10 @@ __doc__ = u"""
 
     >>> h(1,2,3)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'c' is missing
+    TypeError: h() needs keyword-only argument c
     >>> h(1,2, d=1)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'c' is missing
+    TypeError: h() needs keyword-only argument c
 
     >>> k(1,2, c=1, f=2)
     >>> k(1,2, c=1, f=2, e=3)
@@ -75,10 +75,10 @@ __doc__ = u"""
 
     >>> k(1,2,3)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'f' is missing
+    TypeError: k() needs keyword-only argument f
     >>> k(1,2, d=1)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'f' is missing
+    TypeError: k() needs keyword-only argument f
 """
 
 def b(a, b, c):

tests/run/kwonlyargscall.pyx

 __doc__ = u"""
     >>> call3(b)
+    1 2 3
     >>> call4(b)
     Traceback (most recent call last):
     TypeError: b() takes at most 3 positional arguments (4 given)
 
     >>> call2(c)
+    1 2 1
     >>> call3(c)
+    1 2 3
     >>> call4(c)
     Traceback (most recent call last):
     TypeError: c() takes at most 3 positional arguments (4 given)
 
     >>> call2(d)
+    1 2 88
     >>> call2c(d)
+    1 2 1
 
     >>> call3(d)
     Traceback (most recent call last):
@@ -21,64 +26,82 @@ __doc__ = u"""
     TypeError: 'd' is an invalid keyword argument for this function
 
     >>> call2(e)
+    1 2 88 []
     >>> call2c(e)
+    1 2 1 []
     >>> call2d(e)
+    1 2 88 [('d', 1)]
     >>> call2cde(e)
+    1 2 1 [('d', 2), ('e', 3)]
     >>> call3(e)
+    1 2 3 []
     >>> call4(e)
     Traceback (most recent call last):
     TypeError: e() takes at most 3 positional arguments (4 given)
 
     >>> call2c(f)
+    1 2 1 42
     >>> call2cd(f)
+    1 2 1 2
 
     >>> call3(f)
     Traceback (most recent call last):
     TypeError: f() takes at most 2 positional arguments (3 given)
     >>> call2(f)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'c' is missing
+    TypeError: f() needs keyword-only argument c
     >>> call2ce(f)
     Traceback (most recent call last):
     TypeError: 'e' is an invalid keyword argument for this function
 
     >>> call2cf(g)
+    1 2 1 42 17 2 []
     >>> call2cefd(g)
+    1 2 1 11 0 2 []
     >>> call2cfex(g)
+    1 2 1 42 0 2 [('x', 25)]
 
     >>> call3(g)
     Traceback (most recent call last):
     TypeError: g() takes at most 2 positional arguments (3 given)
     >>> call2(g)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'c' is missing
+    TypeError: g() needs keyword-only argument c
     >>> call2c(g)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'f' is missing
+    TypeError: g() needs keyword-only argument f
 
     >>> call2cf(h)
+    1 2 1 42 17 2 () []
     >>> call2cfe(h)
+    1 2 1 42 3 2 () []
     >>> call6cf(h)
+    1 2 1 42 17 2 (3, 4, 5, 6) []
     >>> call6cfexy(h)
+    1 2 1 42 3 2 (3, 4, 5, 6) [('x', 25), ('y', 11)]
 
     >>> call3(h)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'c' is missing
+    TypeError: h() needs keyword-only argument c
     >>> call3d(h)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'c' is missing
+    TypeError: h() needs keyword-only argument c
 
     >>> call2cf(k)
+    1 2 1 42 17 2 () []
     >>> call2cfe(k)
+    1 2 1 42 3 2 () []
     >>> call6df(k)
+    1 2 3 1 17 2 (4, 5, 6) []
     >>> call6dfexy(k)
+    1 2 3 1 3 2 (4, 5, 6) [('x', 25), ('y', 11)]
 
     >>> call3(k)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'f' is missing
+    TypeError: k() needs keyword-only argument f
     >>> call2d(k)
     Traceback (most recent call last):
-    TypeError: required keyword argument 'f' is missing
+    TypeError: k() needs keyword-only argument f
 """
 
 import sys, re
@@ -145,25 +168,33 @@ def call6dfexy(f):
 # the called functions:
 
 def b(a, b, c):
-    pass
+    print a,b,c
 
 def c(a, b, c=1):
-    pass
+    print a,b,c
 
 def d(a, b, *, c = 88):
-    pass
+    print a,b,c
 
 def e(a, b, c = 88, **kwds):
-    pass
+    kwlist = list(kwds.items())
+    kwlist.sort()
+    print a,b,c, kwlist
 
 def f(a, b, *, c, d = 42):
-    pass
+    print a,b,c,d
 
 def g(a, b, *, c, d = 42, e = 17, f, **kwds):
-    pass
+    kwlist = list(kwds.items())
+    kwlist.sort()
+    print a,b,c,d,e,f, kwlist
 
 def h(a, b, *args, c, d = 42, e = 17, f, **kwds):
-    pass
+    kwlist = list(kwds.items())
+    kwlist.sort()
+    print a,b,c,d,e,f, args, kwlist
 
 def k(a, b, c=1, *args, d = 42, e = 17, f, **kwds):
-    pass
+    kwlist = list(kwds.items())
+    kwlist.sort()
+    print a,b,c,d,e,f, args, kwlist