根据python中元组的第二部分从元组列表中删除

contacts.remove((name,ip))

contacts.remove（（名称，IP））

I have the ip and it's unique. I want to remove this tuple from contacts according to the ip and no need to name.

我有ip，它是独一无二的。我想根据ip从联系人中删除这个元组，不需要命名。

I just tried this contacts.remove((pass,ip)), but I encountered an error.

我刚试过这个contacts.remove（（pass，ip）），但是我遇到了一个错误。

3 个解决方案

#1

contacts = [(name, ip) for name, ip in contacts if ip != removable_ip]

要么

for x in xrange(len(contacts) - 1, -1, -1):
    if contacts[x][1] == removable_ip:
        del contacts[x]
        break # removable_ip is allegedly unique

The first method rebinds contacts to a newly-created list that excludes the desired entry. The second method updates the original list; it goes backwards to avoid being tripped up by the del statement moving the rug under its feet.

第一种方法将联系人重新绑定到新创建的列表，该列表排除了所需的条目。第二种方法更新原始列表;它向后移动以避免被del声明移动地毯下的地毯绊倒。

#2

Since the ip to remove is unique, you don't need all the usual precautions about modifying a container you're iterating on -- thus, the simplest approach becomes:

由于要删除的ip是唯一的，因此您不需要修改正在迭代的容器的所有常规预防措施 - 因此，最简单的方法是：

for i, (name, anip) in enumerate(contacts):
  if anip == ip:
    del contacts[i]
    break

#3

This answers my not created question. Thanks for the explanation, but let me summarize and generalize the answers for multiple deletion and Python 3.

这回答了我未创造的问题。感谢您的解释，但让我总结并概括多重删除和Python 3的答案。

list = [('ADC', 3),
        ('UART', 1),
        ('RemoveMePlease', 42),
        ('PWM', 2),
        ('MeTooPlease', 6)]

list1 = [(d, q)
         for d, q in list
         if d not in {'RemoveMePlease', 'MeTooPlease'}]

print(list1)

for i, (d, q) in enumerate(list):
    if d in {'RemoveMePlease', 'MeTooPlease'}:
        del(list[i])

print(list)

The corresponding help topic

相应的帮助主题

#1

contacts = [(name, ip) for name, ip in contacts if ip != removable_ip]

要么

for x in xrange(len(contacts) - 1, -1, -1):
    if contacts[x][1] == removable_ip:
        del contacts[x]
        break # removable_ip is allegedly unique

#2