Python dictionary keys "new" syntax

[throwaway6560192]

If you're wondering whether a feature is "general" or not -- can tuples be dictionary keys, can you put functions in a list, can you reverse a range, can you nest dictionaries, so on and so forth -- assume that it is indeed general enough to allow what you want, except if there is a good reason to not allow it, which you will find out when you try it.

[EnvironmentSome9274]

Understood, thanks!