Typescript: Generic enum types as index for another type

Question

I'm trying to create an indexed type whose index are the values of an enum BUT the enum comes from a generic argument.

export type EnumMap<TEnum extends string | undefined = undefined> = {
  [key: TEnum]: ValueClass;
}
export type EnumMap<TEnum extends string | undefined = undefined> = {
  [key: keyof TEnum]: ValueClass;
}

Both of those implementations shows the error:

An index signature parameter type cannot be a literal type or generic type. Consider using a mapped object type instead.

When I implement it as a mapped object as suggested:

export type EnumMap<TEnum extends string | undefined = undefined> = {
  [TEnumKey in keyof TEnum]: ValueClass;
}

It doesn't show any errors at the definition but it only accepts TEnum instances as the value. It shows this error when I try to instantiate an EnumMap.

Type '{ "test": ValueClass; }' is not assignable to type 'TestEnum'.

I'm using this enum as a test:

export enum TestEnum {
  test = 'test'
}

Is there any way to use a generic enum as a type's index?

PS.: I understand I can implement it using string as the key, but I want to tie the indexes to the enum values;

export type EnumMap = {
  [key: string]: ValueClass;
}
const map: EnumMap = { [TestEnum.test]: {...} }; // works fine

Answer 1

I'm sorry if this isn't much help but shouldn't pip install matplotlib or python -m pip install --user matplotlib(fist command without the $) work?

You can also use pip freeze to check if the module is installed or not.