CODEWITHSUNDEEP
pythonmatlab
JustinBlaber
JustinBlaber

Reputation: 4650

How to call "__call__()" method of python class from matlab

I'm working with a class like this:

class Select(object):       
    def __init__(self, interface):
        ...

    def project(self, ID):
        ...

    def __call__(self, datatype_or_path):
        ...

When I try to call this method (basically a functor) from Matlab like:

select = Select(blah);
select('blah');

I get the following error: 

Array formation and parentheses-style indexing with objects of class
'py.pyxnat.core.select.Select' is not allowed.  Use objects of class
'py.pyxnat.core.select.Select' only as scalars or use a cell array.

EDIT:

select.('__call__')('blah') does not seem to work either

Upvotes: 1

Views: 353

Answers (2)

JustinBlaber
JustinBlaber

Reputation: 4650

From Matlab Tech Support:

My name is sai and I am writing in reference to your Technical Support Case #01708094 regarding 'Calling python functors through matlab'.

I understand that you are experiencing issues while invoking a functor defined in python from MATLAB.

I see that you are using MATLAB R2014b. Please note that this is a known issue in MATLAB R2014b which has been fixed in MATLAB R2015a and there are no known work arounds for this issue in R2014b. If it is feasible, I would recommend to upgrade to MATLAB R2015a which will help you resolve this issue.

Upvotes: 1

bruno desthuilliers
bruno desthuilliers

Reputation: 77912

Obviously the Select class you use in your code is a py.pyxnat.core.select.Select, not your own Select class. Check your imports (and specifically check for a 'star import' - from xxx import * - after the line where you import your own Select class.

Upvotes: 0

Related Questions