python算法习题1

题目：有一组“+”和“-”符号，要求将“+”排到左边，“-”排到右边，写出具体的实现方法

 1 def StringSort(data):
 2     startindex = 0
 3     endindex = 0
 4     count = len(data)
 5     while startindex + endindex < count:
 6         if data[startindex] == '-':
 7             data[startindex] , data[count - endindex -1] = data[count - endindex - 1] ,data[startindex]
 8             endindex += 1
 9         else:
10             startindex += 1
11     return data
12 
13 data = ['-','-','+','-','+','+','-','-']
14 print(StringSort(data))

得到的结果：

['+', '+', '+', '-', '-', '-', '-', '-']