Python 3.6 接受泛型类类型和相同泛型类型的实例类型的函数的类型提示

Python 3.6引入了类型提示的功能，使得代码的可读性和可维护性得到了显著提升。其中一个新特性是能够接受泛型类类型和相同泛型类型的实例类型的函数的类型提示。这个功能使得我们可以更加准确地定义函数的输入和输出类型，从而提高代码的稳定性和可靠性。

python
from typing import List, TypeVar
T = TypeVar('T')
def reverse_list(lst: List[T]) -> List[T]:
    return lst[::-1]

python
from typing import List, TypeVar
T = TypeVar('T')
class Book:
    def __init__(self, title: str, author: str):
        self.title = title
        self.author = author
def get_books_by_author(author: str, books: List[T]) -> List[T]:
    result = []
    for book in books:
        if book.author == author:
            result.append(book)
    return result
# 使用泛型类类型的函数类型提示来定义函数的输入参数和返回值的类型
books = [
    Book('Python Crash Course', 'Eric Matthes'),
    Book('Clean Code', 'Robert C. Martin'),
    Book('The Pragmatic Programmer', 'Andrew Hunt, David Thomas')
]
author = 'Robert C. Martin'
author_books = get_books_by_author(author, books)
for book in author_books:
    print(book.title)