簡單的Python腳本爲大衆電子郵件退出

Question

我有一個Python腳本，選擇用戶的電子郵件。

optouts = [ 
"user1@example.com", 
"user2@example.com", 
"user3@example.com", 
] 

for email in optouts: 
    user = User.objects.get(email=email) 
    profile = user 
    profile.allow_mass_mails = False 
    profile.save() 
    print email, "opted out." 


print "done." 

大約有10,000封電子郵件正在退出。然而，當它發現被綁定到已刪除帳戶的電子郵件，它說：

django.contrib.auth.models.DoesNotExist: User matching query does not exist.

我想它說「跳」（如它打印完成的），如果用戶配置文件不存在。

我嘗試添加「其他打印‘跳過’，但沒有奏效。我是新來的Python和任何幫助表示讚賞。

Answer 1

您可以捕獲該異常，並使用continue跳過記錄。無論是使用異常的模型對象本身，User.DoesNotExist：

for email in optouts: 
    try: 
     user = User.objects.get(email=email) 
    except User.DoesNotExist: 
     print email, "skipped." 
     continue 
    profile = user 
    profile.allow_mass_mails = False 
    profile.save() 
    print email, "opted out." 

或通過顯式導入基本異常，django.core.exceptions.ObjectDoesNotExist：

from django.core.exceptions import ObjectDoesNotExist 

for email in optouts: 
    try: 
     user = User.objects.get(email=email) 
    except ObjectDoesNotExist: 
     print email, "skipped." 
     continue 
    profile = user 
    profile.allow_mass_mails = False 
    profile.save() 
    print email, "opted out."