Python二维数组运算答:二维数组示例:a=[[1,2,3],[4,5,6],[7,8,9]]print a print a[0]print a[1]print a[2]print a[0][0],a[0][1],a[0][2]sum=0 for i in range(0,3):for j in range(0,3):sum=sum+a[i][j]print sum
Python二维数组怎么求并集答:a = ["a", "b", "c", "d"]b = ["b", "e"]c = ["a", "b", "c", "d", "e"]# 并# 合并数组a.extend(b)# 去重array = list(set(a))print(array)# 第二种方法array = list(set(a)|set(b))print(array)打印结果:['c', 'a', 'b', 'd', 'e']['c', ...
python 数组 变成 字典的方法答:1、现在有两个 列表 ,list1 = ['key1','key2','key3']和list2 = ['1','2','3'],把他们转为这样的 字典 :{'key1':'1','key2':'2','key3':'3'} >>list1 = ['key1','key2','key3'] >>list2 = ['1','2','3'] >>>dict(zip(list1,list2)) ...