用Python输出，帕斯卡三角形

-- coding: UTF-8 --

def pask(n):
list1 = [1]
listT = []
listT.append(list1)
listAdd = []
for x in range(2,n+1):
for y in range(x):
if y == 1:
listAdd.append(1)
if y > 1 :
listAdd.append(listT[x-2][y-2]+listT[x-2][y-1])
if y == x - 1:
listAdd.append(1)
continue
listT.append(listAdd)
listAdd = []
#print listT
dayin(listT,n)

def dayin(list,n):
for x in range(n-1):
for z in range(x,n-1):
print " “,
for y in range(1,len(list[x])+1):
print list[x][y-1],” ",
print
#打印的时候如果需要可以将空格替换成制表格，数列较多的时候会对的更齐

pask(10)