dynamic function parameters for **kwargs

[Rotwang]

On 20/09/2013 16:51, bab mis wrote:
> Hi ,
> I have a function as below:
>
> def func(**kwargs):
>      ...
>      ...
>
>
>
> ====
> args="a='b',c='d'"
>
> i want to call func(args) so that my function call will take a var as an parameter.
> it fails with an error "typeError: fun() takes exactly 0 arguments (1 given)"
> . Is there any other way to get the same.

It fails because args is a string and func(args) is passing a single 
string as a positional argument to func, rather than passing the keyword 
arguments a and c. Not sure if I've understood your question, but

args = {'a': 'b', 'c': 'd'}
# or equivalently args = dict(a='b', c='d')
func(**args)

will work. If you need args to be a string like the one in your post 
then you could try

eval('func(%s)' % args)

or

func(**eval('dict(%s)' % args))

but that's only something that should be done if you trust the user who 
will decide what args is (since malicious code passed to eval() can do 
pretty much anything).