def Kdiag(self,X,target):
        foo = np.zeros((X.shape[0],X.shape[0]))
        self.K(X,X,foo)
        target += np.diag(foo)
Return an ASCII-only JSON representation of a Python string
dataset/ETHPy150Open SheffieldML/GPy/GPy/kern/src/todo/symmetric.py/Symmetric.Kdiag--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/_internal/django/utils/simplejson/encoder.py/py_encode_basestring_ascii