from Syncano API

IMHO it's not needed. You just removed the validator from runtime_name, so why bother with this ?
Also why not simply return a list ? When you set attributes for an object you have to do dir(object) instead just print a list.

The list was in first version. Thought that would be nicer in such 'container'; the usage:

RUNTIMES = Script.please.get_runtimes()
# and later
Script.please.create(runtime_name=RUNTIMES.PHP, ...)

# rather than:

RUNTIMES = Script.please.get_runtimes()
# and later
Script.please.create(runtime_name=RUNTIMES[2], ...)

As I understood, you wanted to implement something that reasembles metaenum, but your solution doesn't work like this, because you set attributes on class instance, not on a class itself.

So why simply not "Script.runtime_name.choices" then? You could define a field with @cached_property choices, and make a request from there.

Is it a big deal here? :)
That this is an class instance and not class itself?

Yep - thinkin bout that :) That user must do some inspection.

How do you want to provide constants, if runtime_names can change? dynamically?

Do you have any idea?

And as for solution with list - user must do some inspection too! :)

print(choices) vs print(dir(choices)) is shorter ;)

Few more comments and I will remove this get_runtimes functionality ;)

@dancio @forgems So i removed this method and palce normal constants - what do ya think guys? I need to merge it and release LIB tomorrow to end first phase of parse task :)