Python杨辉三角形

RT Show me the Code

def triangles():
    b = [1]
    while(True):
        yield b
        b = [1] + [b[i] + b[i+1] for i in range(len(b)-1)] + [1]

n = 0
for idx in triangles():
    print(idx)
    n = n + 1
    if n == 10:
        break