生成列表

 

• 1、普通方式

a =list(range(10))

for index,i in enumerate(a):
    a[index] = i + 9
print(a)

• 2、改进版

a = [i+8 for i in a]
print(a)

• 3、三元运算

a = [i*i if i > 20 else i for i in a]
print(a)

• 4、文件读取

lines = [line.strip() for line in open(filename)]