不打印对象详细信息

Question

正在尝试通过方法 getBookDetails 打印 Book 对象的详细信息。我想要的输出是“Ready Player One”，“Cline, Ernest”，2011，但收到消息说“<main 的>

class Book():

    def __init__(self, title = "", author = "", year = None):
        self.title = title
        self.author = author
        self.year = year

    def getTitle(self):
        return self.title

    def getAuthor(self):
        return self.author

    def getYear(self):
        return self.year

    def getBookDetails(self):
        string = ("Title: {}, Author: {}, Year: {}"\
        .format(self.title, self.author, self.year))
        return string
    
b = Book("Ready Player One", "Cline, Ernest", 2011)
print(b.getBookDetails)

Answer 1

缺少括号

要调用函数，您必须在末尾添加 () 括号。

class Book():

    def __init__(self, title = "", author = "", year = None):
        self.title = title
        self.author = author
        self.year = year

    def getTitle(self):
        return self.title

    def getAuthor(self):
        return self.author

    def getYear(self):
        return self.year

    def getBookDetails(self):
        string = ("Title: {}, Author: {}, Year: {}"\
        .format(self.title, self.author, self.year))
        return string
    
b = Book("Ready Player One", "Cline, Ernest", 2011)
print(b.getBookDetails())

输出：-

>>> print(b.getBookDetails)
<bound method Book.getBookDetails of <__main__.Book object at 0x0000015E9B6F8130>>
>>> print(b.getBookDetails())
Title: Ready Player One, Author: Cline, Ernest, Year: 2011

不打印对象详细信息

Not Printing object details

python

printing

缺少括号

输出：-