How to store Python application data

问题:

I'm creating a simple Python CLI tool, which lets the user add and delete tasks (the classic Todo app). This is just for my own use, but I want to get into the best practices of creating such applications. The data will be stored in a simple text file.

Main question: Where should I store the data file? After doing some reading, I'm inclined to create a new folder in /var/lib and keep the data.txt file in that directory. Are there any drawbacks to that option?

Follow up question: Since, by default, only root has access to /var, do I need to change the permissions for the whole /var directory in order to read and write to the data file?

回答1:

User data should be store in the user's home directory. You could use

/Users/joe/.myclitool/data.txt

under Mac OS X and

/home/joe/.myclitool/data.txt

under GNU/Linux.

In Python this can be done with

import os
import os.path

p = os.path.join(os.getenv("HOME"), ".myclitool", "data.txt")