如何将内容传递到python中的类的实例中

Question

我有一个 Book 类，这基本上只返回现在的内容，但是我有一个需要读取的外部文件，然后将内容传递到该实例中，例如我开始将 book 实例声明为 b1

class Book():

    def __init__(self,poem="empty"):

        self.poem = poem

    def __str__(self):

        return self.poem

def reading(instance, file_content):

    list_of_content = []

    with open(file_content, "r") as f:

        for i in f:

            list_of_content.append(i.split())

    flatten = [item for sublist in list_of_content for item in sublist]

    string = " ".join(flatten) 

    instance = Book(string)

    return instance

b1 = Book() # book has a default value so it wont make any error

reading(b1, "file.txt")

print("File contains:",b1) # prints empty, because reading function has not passed any data i think

问题是现在它总是只打印“空”，我如何将从文件中读取的数据传递给在 reading() 调用的实例，这是为了学习目的。

Answer 1

class Book():    def __init__(self,poem="empty"):        self.poem = poem    def __str__(self):        return self.poemdef reading(self, file_content):    list_of_content = []    with open(file_content, "r") as f:        for i in f:            list_of_content.append(i.split())    flatten = [item for sublist in list_of_content for item in sublist]    string = " ".join(flatten)    self.poem=stringb1 = Book() reading(b1, "file.txt")print("File contains:",b1)输出File contains: I really love christmas Keep the change ya filthy animal Pizza is my fav food Did someone say peanut butter?