Implicit vs Explicit typing [typescript] - Typescript to Python field guide

person.ts

interface Person {
  name: string;
  age: number;
  height: number;
  friends: Person[];
}

// Jane implicitly implements the person type
const jane = {
  name: "Jane",
  age: 25,
  height: 1.74,
  friends: [],
};

// Tim implicitly implements the person type
const tim: Person = {
  name: "Tim",
  age: 23,
  height: 1.71,
  friends: [jane],
};