Delete Last Element

最新推荐文章于 2022-08-04 16:44:15 发布

转载最新推荐文章于 2022-08-04 16:44:15 发布 · 460 阅读

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本文提供了一种使用Python方法删除列表中特定位置元素的技术，特别是删除最后一个元素及其更多元素的方法，避免了使用clearLists方法可能带来的不便。

List method to delete last element in list as well as all elements

up vote 13 down vote favorite

yo folks, I have an issue with clearing lists. In the current program which I'm coding, I have a method that clears a certain number of lists. This is rather inconvenient since during one part of the program where this method is used, it would be a lot more helpful if it only deleted the last elementfrom the lists. Is there anyway in which I can set index numbers as parameters to my method to solve this problem?

The code for the method

def clearLists(self):
    del self.Ans[:]
    del self.masses[:]

Whenever I want to use this method, I merely write self.ClearLists() and it deletes every element in a list.

edited Dec 2 '11 at 14:59

asked Dec 2 '11 at 14:52

user1036197

81 1 1 4

I don't see the relation between the question title and body. – fortran Dec 2 '11 at 14:54

Sorry about that, that was a leftover from an old, unposted question, now fixxxed. – user1036197 Dec 2 '11 at 14:59

If you don't want to clear your lists, why would you call a method called clearLists? – Wooble Dec 2 '11 at 15:07

Am I the only what that do not understand what are you looking for? – Tadeck Dec 2 '11 at 15:52

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2 Answers

active oldest votes

up vote 35 down vote

you can use lst.pop() or del lst[-1]

answered Dec 2 '11 at 14:54

fortran

35k 12 78 130

that pop() method rocks, thanks – armani Nov 18 '14 at 22:49

pop() removes and returns the item, in case you don't want have a return use del ;) – flacle 2 days ago

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up vote 4 down vote

To delete the last element of the lists, you could use:

def deleteLast(self):
    if len(self.Ans) > 0:
        del self.Ans[-1]
    if len(self.masses) > 0:
        del self.masses[-1]