def __init__(self, user_id=None):
    super(User, self).__init__()
    self.user_id = user_id
Ensure an etree element is returned
dataset/ETHPy150Open viewfinderco/viewfinder/backend/db/user.py/User.__init__--crossover with--dataset/ETHPy150Open mikemaccana/python-docx/tests/test_docx.py/testopendocx