CircArgs commented on code in PR #4466: URL: https://github.com/apache/iceberg/pull/4466#discussion_r846883912
########## python/src/iceberg/expression/base.py: ########## @@ -0,0 +1,146 @@ +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. +from abc import ABC, abstractmethod +from functools import reduce + +from iceberg.types import Singleton + + +class BooleanExpression(ABC): + """base class for all boolean expressions""" + + @abstractmethod + def __invert__(self) -> "BooleanExpression": + ... + + +class And(BooleanExpression): + """AND operation expression - logical conjunction""" + + def __new__(cls, left: BooleanExpression, right: BooleanExpression, *rest: BooleanExpression): + if rest: + return reduce(And, (left, right, *rest)) Review Comment: This SO answer seems to suggest you only need to specify the type of a single element from the args https://stackoverflow.com/a/37032111/7907717 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
