Why didn't you just pass one element list with your class with it, for example: class MyClass: pass class_list = [MyClass] third_party_function(cla

Why didn't you just pass one element list with your class with it, for example: class MyClass: pass class_list = [MyClass] third_party_function(class_list) # or just third_party_function([MyClass]) ? creating some simple wrapper for third party function, e.g. def wrapper(C): third_party_function([C]) could also be much simpler solution :) But it's maybe off topic.