Solved for "TypeError: issubclass() arg 1 must be a class" when using typing.Literal in `embedding.py`

[Jupiter1995]

Description

It will solve the TypeError caused by using typing.Literal in embedding.py because of the forward reference mechanism. Original Error screenshot is attached.

Solution

Creating a new class with enum.Enum for the literal value to bypass this error, as Literal cannot be subclassed and will cause the TypeError issue mentioned above. The modified parts were screenshots and attached below.

Example

Misc

(Links, notes, @people, etc.)

Inspired by this post

[Jupiter1995]

fix issue #64