标签：lov finish 中括号 索引 判断 lis ini 取值 python学习
1.由[ ]括住，中括号内各元素由逗号隔开，各元素可以是数字，字符串，列表，布尔值等等。
例如：
li = [521,"love",["john","boy",12],True]
print(li)
ps:列表是可以嵌套的
2.取值
-索引取值：
li = [123,"love",[‘a‘,132,‘abc‘],"我爱你",True] print(li[3])
输出结果：
我爱你
Process finished with exit code 0
-切片取值：
li = [123,"love",[‘a‘,132,‘abc‘],"我爱你",True] print(li[1:5])
输出结果：
[‘love‘, [‘a‘, 132, ‘abc‘], ‘我爱你‘, True] Process finished with exit code 0
-循环
li = [123,"love",[‘a‘,132,‘abc‘],"我爱你",True] for a in li : print(a)
输出结果：
123 love [‘a‘, 132, ‘abc‘] 我爱你 True Process finished with exit code 0
2.列表元素是可以修改的
li = [123,"love",[‘a‘,132,‘abc‘],"我爱你",True] li[0] = ‘cao‘ print(li)
运行结果：
[‘cao‘, ‘love‘, [‘a‘, 132, ‘abc‘], ‘我爱你‘, True] Process finished with exit code 0
也可以通过切片的方式修改：
li = [123,"love",[‘a‘,132,‘abc‘],"我爱你",True] li[0:3] = [‘cao‘,‘ni‘,‘ma‘] print(li)
运行结果：
[‘cao‘, ‘ni‘, ‘ma‘, ‘我爱你‘, True] Process finished with exit code 0
2.列表元素的删除
第一种方法：
li = [123,"love",[‘a‘,132,‘abc‘],"我爱你",True] del li[0] print(li)
运行结果：
[‘love‘, [‘a‘, 132, ‘abc‘], ‘我爱你‘, True] Process finished with exit code 0
3.判断是否在列表里（嵌套的元素是一个整体）
li = [123,"love",[‘a‘,132,‘abc‘],"我爱你",True] a = "abc" in li print(a)
运行结果：
False
Process finished with exit code 0
标签：lov finish 中括号 索引 判断 lis ini 取值 python学习
原文地址：https://www.cnblogs.com/liujinjing521/p/11098894.html
