a =list(range(10))
for index,i in enumerate(a):
a[index] = i + 9
print(a)a = [i+8 for i in a]
print(a)a = [i*i if i > 20 else i for i in a]
print(a)lines = [line.strip() for line in open(filename)]原文：http://www.cnblogs.com/xp1005/p/6438527.html