def triangles():
L = [1]
while True:
yield L[:]
a=L[:]
b=L[:]
a.append(0) #L最后一位插0
b.insert(0,0) #L最前面一位插0
L = [ a[i]+ b[i] for i in range(len(a))] #ab同一位置相加,减少思想上的绕弯
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用户6604109897
def triangles():
L = [1]
while True:
yield L[:]
a=L[:]
b=L[:]
a.append(0) #L最后一位插0
b.insert(0,0) #L最前面一位插0
L = [ a[i]+ b[i] for i in range(len(a))] #ab同一位置相加,减少思想上的绕弯