蟒蛇OOP：擴展分類

Question

版本：python3.6.1

源代碼：

class ContactList(list): 
    def search(self,name): 
    '''Return all contacts that contain the search value in their name.''' 
     matching_contacts = [] 
     for contact in self: 
      if name in contact.name: 
       matching_contacts.append(contact) 
      return matching_contacts 

class Contact: 
    all_contacts = ContactList() 
    def __init__(self,name,email): 
     self.name = name 
     self.email = email 
     Contact.all_contacts.append(self) 

然後在IDLE

c1 = Contact("John A","johna@example.com") 
c2 = Contact("John B","johnb@example.com") 
c3 = Contact("Jenna C","jennac@example.com") 
[c.name for c in Contact.all_contacts.search('John')] 

運行的結果應該是['John A','John B']，但我的空閒秀我['John A']

我想弄清楚我的代碼有什麼問題嗎？

Answer 1

那麼，那是因爲你的「回報」處於錯誤的位置。

class ContactList(list): 
def search(self,name): 
'''Return all contacts that contain the search value in their name.''' 
    matching_contacts = [] 
    for contact in self: 
     if name in contact.name: 
      matching_contacts.append(contact) 
    return matching_contacts