标签：xtend att string this erro 添加 list ext class
Attribute
1. len()
list = [1,2,3]
length = len(list)
Condition
1. 如果元素存在list中
list = [‘a‘, ‘b‘, ‘c‘] str = ‘a‘ if str in list:
print("This string is in the list.")
2. 如果list不为空
list = [] if not list: print ("List is empty.")
Add
1. append() - 在尾部加element
list = [1,2,3] list.append(4) # list=[1,2,3,4]
2. extend([]) - 在list后面，添加多个element
list1 = [‘a‘,‘b‘,‘c‘]
list2 = list1.extend([‘d‘,‘e‘]) #list2 = [‘a‘,‘b‘,‘c‘,‘d‘,‘e‘]
Delete
1. del
list = [1,2,3] del list[-1] #list = [1,2]
2. pop()
list = [1,2,3] lastEle = list.pop() # lastEle = 3
Get
1. index(value) - 查找list中的值，并返回其下标
list = [1,2,6] idx = list.index(1) #0 idx = list.index(3) #ValueError: 3 is not in list
标签：xtend att string this erro 添加 list ext class
原文地址：https://www.cnblogs.com/break-dawnn/p/8983580.html
