如何使用python循环生成一个三角形的数字？

def generate_triangle(n):
    triangle = []
    for i in range(1, n+1):
        row = []
        for j in range(i):
            row.append(j+1)
        triangle.append(row)
    return triangle

n = 5
triangle = generate_triangle(n)
for row in triangle:
    print(' '.join(map(str, row)))

1
1 2
1 2 3
1 2 3 4
1 2 3 4 5