def value(self, column):
    'Return a scalar result corresponding to the given\n        column expression.'
    try:
        return next(self.values(column))[0]
    except StopIteration:
        return None
Return a scalar result corresponding to the given
column expression.
def value(self, column):
    'Return a scalar result corresponding to the given\n        column expression.'
    try:
        return next(self.values(column))[0]
    except StopIteration:
        return None