Python 3中未解決的屬性參考

Question

class StringHandling:
    def __init__(self,yo):
        self.yo = yo


def my_first_test():  
yo = input("Enter your string here")  
    ya = (yo.split())  
    even = 0  
    odd = 0  
    for i in ya:    
        if len(i) % 2 == 0:  
            even = even + 1  
        else:  
            odd = odd + 1  
    print("The number of odd words are ", odd)
    print("The number of even words are", even)


if __name__ == '__main__':
    c = StringHandling(yo="My name is here ")
    c.my_first_test()

這里有什么問題？ 嘗試了一切！ 我嘗試了縮進並創建了對象，但是對象c未調用方法my_first_test。

Answer 1

你很親密 嘗試這個：

class StringHandling(object):
    def __init__(self,yo):
        self.yo = yo


    def my_first_test(self):  
        yo = input("Enter your string here: ")
        ya = (yo.split())  
        even = 0  
        odd = 0  
        for i in ya:    
            if len(i) % 2 == 0:  
                even = even + 1  
            else:  
                odd = odd + 1  
        print("The number of odd words are ", odd)
        print("The number of even words are", even)


if __name__ == '__main__':
    c = StringHandling(yo="My name is here ")
    c.my_first_test()

看看這個靈感： https : //jeffknupp.com/blog/2014/06/18/improve-your-python-python-classes-and-object-oriented-programming/

注意我所做的更改：

• 縮進yo = input("Enter your string here")並格式化文本字符串
• 縮進整個my_first_test方法
• 在方法中增加了self -在這里閱讀為什么會這樣： 自我的目的是什么？

結果

python3 untitled.py 
Enter your string here: a ab a
The number of odd words are  2
The number of even words are 1