[SciPy-dev] Multiple constraints in fmin_cobyla

[Nils Wagner]

Robert Kern wrote:
>Nils Wagner wrote:
>  
>>Hi all,
>>
>>How can I apply multiple constraints (e.g. all design variables x \in
>>\mathds{R}^n should be positive) in fmin_cobyla ?
>>
>>x_opt=optimize.fmin_cobyla(func, x, cons, args=(), consargs=(),maxfun=1200)
>>
>>def cons(x):
>>
>>    ?????
>>    
>
>The documentation is pretty clear:
>
>    cons     -- a list of functions that all must be >=0 (a single function
>                if only 1 constraint)
>
>  
I am aware of the help function :-) 
Anyway, how do I define a l i s t of functions ?