python列表的增删改查 python列表的增删改查实例代码

names=["zhao00","qian01","sun02","li03","li03","li03","zhou04"]
#print(names[]) 打印错误
print(names)

names.append("wu05") #增加到最后
names.insert(1,"zheng06") #增加到指定位置

names[0]="zhao" #改

#names.remove("zheng06")
#del names[5]
#names.pop() #  没有下标，默认删掉最后一个
#names.pop(0)
#print(names)
#del names 把整个列表删除
#names.clear() 把列表的元素删除

print(names.index("qian01")) #查位置
print(names[names.index("qian01")])#并打印数据
print(names.count("li03"))#统计相同元素的个数

names2=["01","02","03"]
names.extend(names2) #合并

print(names[0:3]) #左闭右开，等效于[:3]
print(names[-1]) #取最后一个
print(names[-2:]) #取最后两个，[-2:0],[-2:-1]不行

.print(names)
----------
.for i in names:
 print(i)
----------
.print(names[0:-1:1])
 #间隔一个输出print(names[0:-1:2])