def datetime_trunc_sql(self, lookup_type, field_name, tzname):
        raise NotImplementedError()
Returns the magnitude of this vector.
dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/Django-1.6.10/django/db/backends/__init__.py/BaseDatabaseOperations.datetime_trunc_sql--crossover with--dataset/ETHPy150Open sympy/sympy/sympy/vector/vector.py/Vector.magnitude