一行代码搞定for, if 语句

1. a = [i for i in range(2)0]  -->  a == [0, 1]
2. a = [j for i in [[1,2], [3,4]] for j in i]  --> a == [1, 2, 3, 4]
3. a = [ i for i in range(3) if i >1] --> a == [2]
4. a = [ i if >1 else 0 for i in range(3)] --> a == [0, 0, 2]
5. print('a>1' if a > 1 else 'a<3' if a < 3 else 'a>3')