将一个数列中的奇数放在左边，偶数放在右边

#!/usr/bin/env python
def reorder (nums):
    odd = []
    even = []
    for i in nums:
        if i % 2 == 0:
            even.append(i)
        else:
            odd.append(i)
    return odd + even
a = [1,2,3,4,5]
b = [0,5,9,2,3,6]
c = [-1,0,2,5]
d = [0,0,0,2]
e = [1,1]
f = [2]
print reorder(a)
print reorder(b)
print reorder(c)
print reorder(d)
print reorder(e)
print reorder(f)