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  • Chris Kang thinks this is interesting:

Types are also callable, as we already saw for the dict, list, set, and tuple built-in types. (See “Built-in Types” for a complete list of built-in types.)

From

Cover of Python in a Nutshell, 3rd Edition

Note

"Types" refers to the name of the type, not a class. So "tuple", which referes to tuple type can be called using "dot" notation (eg. tuple.xxxx())