代码：
def fun(n): a = [] for i in range(n): a.append([])#[[],[],[],[],[]] for j in range(n): a[i].append(0)#此处以n=5为例：[[0,0,0,0,0],[0,0,0,0,0],[0,0,0,0,0],[0,0,0,0,0],[0,0,0,0,0]] #填几占位都行，不然后面无法用索引，我这里填了0 for i in range(n): a[i][0]=1#第一位改成1 a[i][i]=1#最后一位改成1 for i in range(2,n): for j in range(1,i): a[i][j]=a[i-1][j-1]+a[i-1][j]#a[i][j]=它肩上两个数的和 for i in range(n): for j in range(i + 1): print(str(a[i][j]),end=' ')#列表转化成字符串 print() def main(): n=int(input('请输入要显示几行杨辉三角：')) fun(n) if __name__ == '__main__': main()输出：
请输入要显示几行杨辉三角：5 1 1 1 1 2 1 1 3 3 1 1 4 6 4 1