For instance, a list can’t be a key ... to the problem you’re actually trying to solve. Finally, Python has another data structure, the set, which superficially resembles a dictionary.

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A common problem in computing is to find out if a list contains duplicate entries ... The hash can be considered a pointer or direct reference into the underlying data structure, which makes lookup ...

Part of Python's ease of use comes from its extensive list of data types, which include powerful collection types, such as lists. Similarly, the Python "string" type functions as a collection type ...

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