Common Type

mediumpy_basics

Implement get_common_type(type1, type2).

Given two of the types bool, int, float, complex, list, range, tuple, str, return the most specific type that both values can be converted to, so that result(value1) and result(value2) both succeed and make sense.

Rules (two ladders of increasing generality):

numbers: bool → int → float → complex
sequences: range → tuple → list

Within one ladder, return the more general of the two. Mixing a number with a sequence — or anything with str — returns str. Note range is never a common type (you can't build a range from arbitrary elements), so two ranges share tuple. The result must be the same regardless of argument order.

Your solution

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Hints

Hint 1

Two ladders of increasing generality: numbers bool→int→float→complex, sequences range→tuple→list. Within a ladder, pick the more general.

Hint 2

A number mixed with a sequence (or anything mixed with str) has no shared container — fall back to str. Two ranges share tuple, since you can't build a range from arbitrary elements.