src/polydatum/context.py
def require(self, key):
        """
        Raises an exception if value for ``key`` is empty.
        """
        value = self.get(key)
        if not value:
            raise ValueError('"{}" is empty.'.format(key))
        return value
def require(self, key):
        """
        Raises an exception if value for ``key`` is empty.
        """
        value = self.get(key)
        if not value:
            raise ValueError('"{}" is empty.'.format(key))
        return value
Raises an exception if value for ``key`` is empty.