Python bubble insert select sort simple instances

The Python implementation of bubble, insert, selection and sorting simple examples described in this paper is more suitable for Python beginners to learn data structure and algorithm from the foundation, the example is simple and easy to understand, the specific code is as follows:

# -*- coding: cp936 -*-
#python Insertion sort 
def insertSort(a):
  for i in range(len(a)-1):
    #print a,i 
    for j in range(i+1,len(a)):
      if a[i]>a[j]:
        temp = a[i]
        a[i] = a[j]
        a[j] = temp
  return a

#Python Bubble sort   
def bubbleSort(alist):
  for passnum in range(len(alist)-1,0,-1):
    #print alist,passnum
    for i in range(passnum):
      if alist[i]>alist[i+1]:
        temp = alist[i]
        alist[i] = alist[i+1]
        alist[i+1] = temp
  return alist

#Python Selection sort  
def selectionSort(alist):
  for i in range(len(alist)-1,0,-1):
    maxone = 0
    for j in range(1,i+1):
      if alist[j]>alist[maxone]:
        maxone = j
    temp = alist[i] 
    alist[i] = alist[maxone]
    alist[maxone] = temp 
  return alist

alist = [54,26,93,17,77,31,44,55,20]
#print bubbleSort(alist)
alist = [54,26,93,17,77,31,44,55,20]
print selectionSort(alist)

Interested friends can start to test this example, I believe that there will be new harvest.