To add an item to the end of the list, use theappend()method: ExampleGet your own Python Server Using theappend()method to append an item: thislist = ["apple","banana","cherry"] thislist.append("orange") print(thislist) Try it Yourself » ...
The list data type has some more methods. Here are all of the methods of list objects:除了第前面的，列表还有更多的方法，下面就是列表对象的所有方法：list.append(x)Add an item to the end of the list. Equivalent to a[len(a):] = [x].本方法是添加一个元素到列表末，相当于a[len(a):]...
Insert an item at a given position. The first argument is the index of the element before which to insert, soa.insert(0,x)inserts at the front of the list, anda.insert(len(a),x)is equivalent toa.append(x). list.remove(x)#删除 list 中第一个值为 x 的元素(即如果 list 中有两个 ...
Add an item to the end of the list; equivalent toa[len(a):]=[x]. list.extend(L) Extend the list by appending all the items in the given list; equivalent toa[len(a):]=L. list.insert(i,x) Insert an item at a given position. The first argument is the index of the element bef...
class Node: """单链表的节点""" def __init__(self, item): # item 存放数据元素 self.item = item # next是下一个节点的标识 # 直接指向下一个节点对象即可 self.next = None class SingleLinkList: """单链表""" def __init__(self, node=None): # head只是一个变量,指向头节点 self.head...
You access the list items by referring to the index number:ExampleGet your own Python Server Print the second item of the list: thislist = ["apple", "banana", "cherry"] print(thislist[1]) Try it Yourself » Negative Indexing
def getfront(page,item): #page是页数,item是输入的字符串,见后文 result = urllib.parse.quote(item) #先把字符串转成十六进制编码 ur1 = result+',2,'+ str(page)+'.html' ur2 = 'https://search.51job.com/list/000000,000000,0000,00,9,99,' res = ur2+ur1 #拼接网址 a = urllib.requ...
# When using a stock ID we don't need to specify the menu item's # label exitItem = fileMenu.Append(wx.ID_EXIT) # Now a help menu for the about item helpMenu = wx.Menu() aboutItem = helpMenu.Append(wx.ID_ABOUT) # Make the menu bar and add the two menus to it. The '&'...
Where exprlist is the assignment target. This means that the equivalent of {exprlist} = {next_value} is executed for each item in the iterable. An interesting example that illustrates this: for i in range(4): print(i) i = 10 Output: 0 1 2 3 Did you expect the loop to run just...
List() 创建一个新的空list length() 定义项目在list里面的数量(重载__len__ method) is_empty() 定义list是否是空的,如果是空,则返回True,反之,返回False add(item) 添加一个新的项目到list的末端,新加的项目成为位置最后的项目 insert(index, item) 在index提供的情况下,将该项目添加到一个index所指示的...