def triangles():
    s = []
    m = 1
    while 1:
        s.append(1)
        yield s
        s = [s[x]+s[m – x] for x in range(1,m)]#不包含头尾两个1
        s.insert(0,1)
        m = m + 1            
n = 0
for t in triangles():
    print(t)
    n = n + 1
    if n == 10:
        break