# class CommandSet

CommandSet is a subclass of the built-in set type designed for representing a set of command names, as used by the basic_menus() function. The following additional features are provided.

- The constructor accepts a single item (a string) as well as a collection of items.
- The + operator may be used as a synonym for | (set union).
- Union and difference operations accept a string or sequence of strings as the other operand.

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