def index(self, val):
        for i in xrange(0, len(self)):
            if self[i] == val: return i
        raise ValueError('%s not found in object' % str(val))

    ## Mutating ##
Class method used by GeometryField on initialization to
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/contrib/gis/geos/mutable_list.py/ListMixin.index--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/contrib/gis/db/backends/base.py/SpatialRefSysMixin.get_spheroid