如何在Python中处理具有不同参数集(或类型)的构造函数或方法？

def greet(name, greeting="Hello"):
    print(greeting, name)

greet("Alice")
greet("Bob", "Hi")

def greet(*names):
    for name in names:
        print("Hello", name)

greet("Alice", "Bob", "Charlie")

def greet(**kwargs):
    for name, greeting in kwargs.items():
        print(greeting, name)

greet(Alice="Hello", Bob="Hi")

def greet(name: str, greeting: str = "Hello") -> None:
    print(greeting, name)

greet("Alice")
greet("Bob", "Hi")

from typing import Union

def greet(name: Union[str, int], greeting: str = "Hello") -> None:
    if isinstance(name, int):
        name = "User" + str(name)
    print(greeting, name)

greet("Alice")
greet(123)