Watch the difference: A variable that can be an object with two elements (one of them being a list of strings), or a tuple of exactly two strings.
// typescript
let t: {a: string[], b: number} | [string, string]
# python 3.8
from typing import TypedDict, Tuple, Union
class SomeTypedDict(TypedDict):
a: List[str]
b: Union[float, int]
t: Union[SomeTypedDict, Tuple[str, str]]
I had to google a bunch to figure out how to write the Python version, whereas the typescript one was completely natural to write. It takes one line and requires no imports. The interface is inlined. All of this also makes it more readable when you come across it eg. in an IDE tooltip.
