Accessing public attributes of Python class in Java with Jython -

to access python objects in java using jython, it's necessary create java interface , use coersion (pyobject.__java__()) assign object java reference. (http://www.jython.org/faq2.html)

the problem python library i'm trying use not have gets , sets, , don't want change library code if can.

is there way public variables without having implement python classes subclass , expose attributes through methods?

thanks.

you can access attributes pyobject directly using __getattr__(pystring) , __setattr__(pystring, pyobject) methods.

you can attribute with:

pyobject pyobject = ...; // attribute: value = getattr(obj, name) //            or: value = obj.__getattr__(name) pystring attrname = py.newstring("some_attribute"); pyobject attrvalue = pyobject.__getattr__(attrname); 

• warning: make sure use __getattr__(pystring) because __getattr__(string) works interned strings.

you can set attribute with:

pyobject pyobject = ...; // set attribute: setattr(obj, name, value) //            or: obj.__setattr__(name, value) pystring attrname = py.newstring("some_attribute"); pyobject attrvalue = (pyobject)py.newstring("a string new value."); pyobject.__setattr__(attrname, attrvalue); 

• note: value not have pystring. has pyobject.

• warning: make sure use __setattr__(pystring, pyobject) because __setattr__(string, pyobject) works interned strings.

also, can call python method using __call__(pyobject[] args, string[] keywords):

pyobject pyobject = ...;  // method: method = getattr(obj, name) //         or: method = obj.__getattr__(name) pystring methodname = py.newstring("some_method"); pyobject pymethod = pyobject.__getattr__(methodname);  // prepare arguments. // note: args contains positional arguments followed keyword argument values. pyobject[] args = new pyobject[] {arg1, arg2, ..., kwarg1, kwarg2, ...}; string[] keywords = new string[] {kwname1, kwname2, ...};  // call method: result = method(arg1, arg2, ..., kwname1=kwarg1, kwname2=kwarg2, ...) pyobject pyresult = pymethod.__call__(args, keywords); 

• note: cannot explain why keyword names string here when getting attribute name requires pystring.