If you choose to use this code in your own system be sure to check if a location is returned and present an informative error message to the user if a location isn't resolved.
如果您选择在自己的系统中使用该代码，一定要检查是否会返回位置并且如果未对某个位置进行解析时为用户呈现一条告知性的错误消息。
At some point each developer must check his or her code into the source control system to see whether it will work with all the code others have written and checked in.
在某一时刻，每个开发人员都必须将他的或她的的代码检入到源控制系统中，以考察这些代码是否能和其他人编写并提交的代码一起工作。
The first three lines of code check out the latest version of sqlalchemy and add it as a package to the Python installation on your local system.
前三行代码检查最新版本的 sqlalchemy，并将它作为包添加到您本地系统的 Python 安装中。
应用推荐