from functools import partial
from inspect import getargspec, ismethod
def keywords_first(f):
def wrapper(*a, **k):
a = list(a)
#for idx, arg in enumerate(f.func_code.co_varnames[:f.func_code.co_argcount], -ismethod(f)):
for idx, arg in enumerate(getargspec(f).args, -ismethod(f)): # or [0] in 2.5
if arg in k:
if idx < len(a):
a.insert(idx, k.pop(arg))
else:
break
return f(*a, **k)
return wrapper
@keywords_first
def fun(a, b, c=3): return a, b, c
print fun(1, 3, b=2) # normally: TypeError: f() got multiple values for keyword argument 'b'
def fun2(a, b, *args, **kwargs): return a, b, args, kwargs
print partial(keywords_first(fun2), a=1, c=2, b=2)(3, 4, 5, 6, 7) # noramlly: TypeError ...
def kfpartial(fun, *args, **kwargs):
return partial(keywords_first(fun), *args, **kwargs)
print kfpartial(fun2, a=1, b=2)(3, 4, 5, 6, 7, c=3)
Diff to Previous Revision
--- revision 1 2011-10-26 12:03:07
+++ revision 2 2011-10-27 16:54:26
@@ -1,11 +1,11 @@
from functools import partial
-from inspect import getargspec
+from inspect import getargspec, ismethod
def keywords_first(f):
def wrapper(*a, **k):
a = list(a)
- #for idx, arg in enumerate(f.func_code.co_varnames[:f.func_code.co_argcount]):
- for idx, arg in enumerate(getargspec(f).args): # or [0] in 2.5
+ #for idx, arg in enumerate(f.func_code.co_varnames[:f.func_code.co_argcount], -ismethod(f)):
+ for idx, arg in enumerate(getargspec(f).args, -ismethod(f)): # or [0] in 2.5
if arg in k:
if idx < len(a):
a.insert(idx, k.pop(arg))
