alt Hacker NewsWhy not just use a dictionary, or why not just leave the type unannotated? If you really can't (or don't want to) say anything about the type, then don't. Python is dynamically typed!
Replies
sdeframond • today at 5:06 PM
The point is to mark the constructor as "private" so that it is easy to spot unintended use during code reviews (or using linters).
techn00 • today at 5:06 PM
average python script writer
The blog post does want to share some type information with users. They just want to prevent users from relying on a specific implementation of that type.
They are basically describing a public API backed by a private type that they can extend, rearrange, or otherwise modify without breaking the public contract.