Lists in Python

Question

Is the List in python homogeneous or heterogeneous?

Answer 1

One more argument for homogeneity of lists: the PEP 484 and the new typing module. The items of tuple can be individually typed with Tuple:

Tuple, used by listing the element types, for example Tuple[int, int, str]. The empty tuple can be typed as Tuple[()]. Arbitrary-length homogeneous tuples can be expressed using one type and ellipsis, for example Tuple[int, ...]. (The ... here are part of the syntax, a literal ellipsis.) [reference]

>>> import typing
>>> typing.Tuple[str, int, float]
typing.Tuple[str, int, float]

However a list, via typing.List only accepts a single type parameter:

List, used as List[element_type]

>>> typing.List[str, int, float]
Traceback (most recent call last):
  ...
TypeError: Too many parameters for typing.List<~T>; actual 3, expected 1