Python 列表如何添加元素

幽沉谢世事,俯默窥唐虞。这篇文章主要讲述Python 列表如何添加元素相关的知识,希望能为你提供帮助。
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:
【Python 列表如何添加元素】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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