老师,我这个怎么会报错呢???
>>> b
[10, 20, 30, 40, 50, 60]
>>> a = list(b*2)
>>> a
[10, 20, 30, 40, 50, 60, 10, 20, 30, 40, 50, 60]
>>> c = list(range(4,50,3))
>>> c
[4, 7, 10, 13, 16, 19, 22, 25, 28, 31, 34, 37, 40, 43, 46, 49]
>>> a1 = a
>>> a = a1 + c
>>> a
[10, 20, 30, 40, 50, 60, 10, 20, 30, 40, 50, 60, 4, 7, 10, 13, 16, 19, 22, 25, 28, 31, 34, 37, 40, 43, 46, 49]
>>> a
[10, 20, 30, 40, 50, 60, 10, 20, 30, 40, 50, 60, 4, 7, 10, 13, 16, 19, 22, 25, 28, 31, 34, 37, 40, 43, 46, 49]
>>> a1 = a
>>> a = [for x in range(a1)if x%9==3]
SyntaxError: invalid syntax