__init__.py 文件源码

def find(self, *args, **kwargs):
        """Create a :class:`MotorCursor`. Same parameters as for
        PyMongo's :meth:`~pymongo.collection.Collection.find`.

        Note that ``find`` does not take a `callback` parameter, nor does
        it return a Future, because ``find`` merely creates a
        :class:`MotorCursor` without performing any operations on the server.
        ``MotorCursor`` methods such as :meth:`~MotorCursor.to_list` or
        :meth:`~MotorCursor.count` perform actual operations.
        """
        if 'callback' in kwargs:
            raise pymongo.errors.InvalidOperation(
                "Pass a callback to each, to_list, or count, not to find.")

        cursor = self.delegate.find(*args, **kwargs)
        return MotorCursor(cursor, self)