java list 浜岀淮鏁扮粍_java鐢╨ist寤虹珛浜岀淮鏁扮粍?

一维数组没有行列的说法

# a=list(map(int,input().split()))
# print(a[1])
# print(len(a))
# # print(a.shape[0])     # AttributeError: 'list' object has no attribute 'shape'

# import numpy as np
# a = np.array([1,2])
# print(type(a))  #
# print(a.shape)  #(2,)
# print(a.shape[0]) #2
# print(a.shape[1])  #IndexError: tuple index out of range 一维元组

# n = 4
# a1 = [0] * n
# a2 = [0 for _ in range(n)]
# print('a1:',a1)  # 复制[0, 0, 0, 0]
# print('a2:',a2)  # 创建[0, 0, 0, 0]

# m,n = 3,4
# dp2 = [[0 for _ in range(n) ] for _ in range(m)]   或者[[0] * n ] * m
# print(dp2)  #[[0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0]]

n=int(input())  #三角形为n阶数  #4

matrix1 = [[0] for _ in range(n)]         #[[0], [0], [0], [0]]
matrix2=[[0]*( _ + 1 ) for _ in range(n)] #金字塔 [[0], [0, 0], [0, 0, 0], [0, 0, 0, 0]]
print(matrix1)
print(matrix2)