如何打印对象本身而不是对象的位置python？

Question

我正在制作一个程序，它将从文本文件中读取包含问题、答案和奖励分数的行，它们分别位于第 i、i+1 和 i+2 行。这些行将被读取，然后保存在 TreasureChest 类型的数组中。但是当我打印时，我得到输出：


[<__main__.TreasureChest object at 0x7f89197c5470>, <__main__.TreasureChest object at 0x7f89197c54a8>, <__main__.TreasureChest object at 0x7f89197c5400>, <__main__.TreasureChest object at 0x7f89197c5438>, <__main__.TreasureChest object at 0x7f89197c57b8>, <__main__.TreasureChest object at 0x7f89197c5828>, <__main__.TreasureChest object at 0x7f89197c5860>, <__main__.TreasureChest object at 0x7f89197c5898>, <__main__.TreasureChest object at 0x7f89197c58d0>, <__main__.TreasureChest object at 0x7f89197c5908>, <__main__.TreasureChest object at 0x7f89197c5940>, <__main__.TreasureChest object at 0x7f89197c5978>, <__main__.TreasureChest object at 0x7f89197c59b0>, <__main__.TreasureChest object at 0x7f89197c59e8>, <__main__.TreasureChest object at 0x7f89197c5a20>]

我知道这是关于打印字符串而不是对象位置的常见问题，但是 none 这里的答案对我的情况有效或有用。

代码如下：




import linecache


searchfile = open("TreasureChestData.txt", 'r')

class TreasureChest:

    def __init__(self, question, answer, points):

        self.question = question 
        self.answer = answer 
        self.points = points 



    

def read_data():

    searchfile = open("TreasureChestData.txt", 'r')
    arrayTreasure = []
    

    for i in range (1, 16):


        question = linecache.getline('TreasureChestData.txt', i)
        answer = linecache.getline('TreasureChestData.txt', (i+1))
        pointer = linecache.getline('TreasureChestData.txt', (i+2))

        arrayTreasure.append(TreasureChest(question, answer, pointer))

        i = i + 3

    print (len(arrayTreasure))

    return arrayTreasure

    searchfile.close()
    
data = read_data()
print (data)

Answer 1

您所看到的只是特殊 __str__ 方法的默认实现。您所要做的就是 def __str__(self):，然后 return 您想要使用的任何字符串。

Answer 2

定义 class 的 __repr__（它控制它在容器中以及其他地方的显示方式）及其 __str__（它控制它在打印时的显示方式） .它们可以相同，如此处所示。

class TreasureChest:

    def __init__(self, question, answer, points):
        self.question = question 
        self.answer = answer 
        self.points = points 

    def __repr__(self):
        return f'{type(self).__name__}("{self.question}")'

    __str__ = __repr__

t = TreasureChest("What is the airspeed veloicity of an unladen swallow?", 42, 100)
print(t)

如何打印对象本身而不是对象的位置python？

How to print the object itself instead of the location of the object python?

python

oop

object

file-handling