我试图从一个输入中获取两个变量,如下所示:
x, y = input().split()
print(x, y)
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但我想让y变量可选,所以如果用户只输入x它只会打印该值.我得到一个ValueErrorif只插入x参数.
谁知道怎么做?
尝试在 docker-compose mysql 8 中使用自定义配置文件。 docker-compose.yml 看起来像
version: '3'
services:
db:
container_name: test-mysql8
image: mysql/mysql-server:8.0
volumes:
- <host path to>/mycustom.cnf:/etc/mysql/conf.d/custom.cnf
environment:
- MYSQL_ROOT_PASSWORD=pass
- MYSQL_DATABASE=testdb
- MYSQL_USER=testuser
- MYSQL_PASSWORD=testpassword
ports:
- "3306:3306"
restart: always
adminer:
image: adminer:latest
restart: always
ports:
- "8080:8080"
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以下是自定义配置文件 mycustom.cnf
[mysqld]
max_allowed_packet=32M
character-set-server=utf8
collation-server=utf8_bin
transaction_isolation=READ-COMMITTED
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运行docker-compose up -d并验证变量docker exec -it test-mysql8 bash
mysql -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 8 …Run Code Online (Sandbox Code Playgroud) 代码段:
$scope.IsVisible = false;
$scope.ShowHide = function () {
$scope.IsVisible = $scope.IsVisible ? false : true; // error
};
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得到此ESLint错误:错误在条件表达式no-unneeded-ternary中不必要地使用布尔文字
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