选择排序python实现

def findsmallest(arr):
 smallest=arr[0]
 smallest_index=0
 for i in range(1,len(arr)):
#smallest_index+=1
 if arr[i]<=smallest:
 smallest=arr[i]
 smallest_index=i
return smallest_index
def selectionsort(arr):
 l=[]
for i in range(len(arr)):
 smallest=findsmallest(arr)
 l.append(arr.pop(smallest))
return l
a=[7,4,8,2,9]
print(selectionsort(a))
pop()用法括号中是index