def tr( self ):
        return Mat(zip(*self))
Perform the caching that gives this loader its name. Often many of the
dataset/ETHPy150Open sunlightlabs/clearspending/completeness/statlib/matfunc.py/Matrix.tr--crossover with--dataset/ETHPy150Open django/django/django/template/loaders/cached.py/Loader.get_template