python 实现插入排序算法

#!/usr/bin/python 

def insert_sort(array): 
for i in range(1, len(array)): 
key = array[i] 
j = i - 1 
while j >= 0 and key < array[j]: 
array[j + 1] = array[j] 
j-=1 

array[j + 1] = key 

if __name__ == "__main__": 
array = [2, 4, 32, 64, 34, 78, 23, 2345, 2345, 12, 1, 3] 

insert_sort(array) 
for a in array: 
print a