weixin_42129882的博客

数组# Pythona = list() //or a = []a = a.append('b')# 截取数组a[1:3]//javaList<String> a = new ArrayList<>();String b = "b";a.add(b);//截取数组Arrays.copyOfRange(a,1,3);字典# Python # 1.a = {'A':1}# 2.a = dict()a['A']=1b = a['A']# 设置默