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I'm using ConfigParser in Python
config.ini is
[general]
name: my_name
base_dir: /home/myhome/exp
exe_dir: ${base_dir}/bin
Here I want exp_dir becomes /home/myhome/exp/bin not ${base_dir}/bin.
It means ${base_dir} would be substituted to /home/myhome/exp automatically.
319
ConfigParser is a Python class which implements a basic configuration language for Python programs. It provides a structure similar to Microsoft Windows INI files. ConfigParser allows to write Python programs which can be customized by end users easily.
To read and write INI files, we can use the configparser module. This module is a part of Python's standard library and is built for managing INI files found in Microsoft Windows. This module has a class ConfigParser containing all the utilities to play around with INI files. We can use this module for our use case.
A Python configuration file is a pure Python file that populates a configuration object. This configuration object is a Config instance.
You can use ConfigParser interpolation
On top of the core functionality, SafeConfigParser supports interpolation. This means values can contain format strings which refer to other values in the same section, or values in a special DEFAULT section. Additional defaults can be provided on initialization.
For example:
[My Section] foodir: %(dir)s/whatever dir=frob long: this value continues in the next linewould resolve the %(dir)s to the value of dir (frob in this case). All reference expansions are done on demand.
Your example becomes:
[general]
name: my_name
base_dir: /home/myhome/exp
exe_dir: %(base_dir)s/bin
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