Dynamically create ConfigurationSets?

[middlec000]

I'm hoping to build a ConfigurationSet based on user input where the user may choose one or more Configurations. Can this be done dynamically (in terms of number of Configurations) with python-configuration? See my attempt below, which is throwing an error: ValueError: configs should be a non-empty iterable of Configuration objects

import config

config_default = {
    "1": 1.1,
    "2": 2.2,
    "3": 3.3,
}

config_choices = {
    "a": {
        "1": 45.2,
    },
    "b": {
        "2": 6.7,
    },
}

user_input = ["a", "b"]
# user_input = ["a"]

cfg = config.ConfigurationSet(
    [config.config_from_dict(config_choices[choice]) for choice in user_input] + [config_default]
)

Context: I'd like the user to be able to select one or more configs from a set of predefined configs. The configs will fall back sequentially and ultimately rely on a default config. I want the non-default configs to only specify differences from the default. I have gotten all the pieces of this to work using python-config except for dynamically creating ConfigurationSets.

Using Python 3.9 and python-config version '0.10.0'

Edit: Make keys strings. Didn't realize this was required.

[tr11]

Yes, this was one of the use cases the lib was build for. Try this:

cfg = config.ConfigurationSet(
  config.config_from_dict(config_default), 
  *[config.config_from_dict(config_choices[choice]) for choice in user_input]
)

The issue with your code above is that a ConfigurationSet expects the configs as arguments and you're passing a list -- unwrapping with the * will do the trick.

[middlec000]

Thanks!