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@tcpdump-examples
Created February 13, 2022 13:27
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Python添加元素有三种方法:append、extend、insert

append:向列表添加元素,添加到尾部

实例:

list=["my","name","is","mark","age",18] print("添加前:",list) list.append("test") print("添加后:",list) 打印结果:

添加前: ['my', 'name', 'is', 'mark', 'age', 18] 添加后: ['my', 'name', 'is', 'mark', 'age', 18, 'test']

extend:将另外一个列表的元素逐一添加到指定列表中

实例:

list=["my","name","is","mark","age",18] print("extend前:",list) list2=["A","B"] list.extend(list2) print("extend后:",list) 打印结果:

extend前: ['my', 'name', 'is', 'mark', 'age', 18] extend后: ['my', 'name', 'is', 'mark', 'age', 18, 'A', 'B']

inset(index,objectA):在指定位置index前面插入对象objectA

实例:

list=["my","name","is","mark","age",18] print("insert前:",list) list.insert(3,"test") print("insert后:",list) 打印结果:

insert前: ['my', 'name', 'is', 'mark', 'age', 18] insert后: ['my', 'name', 'is', 'test', 'mark', 'age', 18]

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