如何使用 Python 中的 ConfigParser() 读取列表中的列表？

Question

I have seen a lot of answers on how to read in a list using ConfigParser in Python:

• Lists in ConfigParser
• Getting a list from a config file with ConfigParser
• How to store dictionary and list in python config file?
• Get a list from config.ini file

But I am wondering how I can read in a list with multiple lists

For example, I have a config.ini :

[INPUT]
values = [[40000, 60000], [70000, 80000]]

A function in my main.py needs to read the above as:

[[40000, 60000], [70000, 80000]]

I am not sure if it matters, but values can be any size list, so for example:

[[40000, 60000]]

or

[[40000, 60000], [70000, 80000], [90000, 95000]]

I know the below will not work, but for clarity, I am reading the lists within the list into main.py like this:

self.values = config['INPUT']['values']

self is there because I am using a class. These are my declarations in the beginning of main.py :

import configparser
config = configparser.ConfigParser()
config.sections()
config.read('config.ini')

Answer 1

You can store a list (or list of lists or dict or whatever) as a string, and use ast to recover it.

Config:

[INPUT]
values = [[40000, 60000], [70000, 80000]]

And script (simplified as reading string variable from config is not a problem):

import ast
list_in_list = ast.literal_eval(string_var_read_from_config)