def __getitem__(self, other):
            return self.expr.op('->', precedence=5)(other)
Text expression.  Get the value at a given key.  Note that the
dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/sqlalchemy/dialects/postgresql/hstore.py/HSTORE.comparator_factory.__getitem__