1 #!/usr/bin/env python 2 # conding=utf8 3 import sys 4  5 class Linelist: 6  7     def __init__(self,length=11): 8         self.list = [] 9         self.maxlength = length10         11     def Initlength(self,length,list):12         self.maxlength = length13         self.list = list14 15     def Listempty(self):16         if len(self.list) == 0:17             return True18         else:19             return False20 21     def Listfull(self):22         if len(self.list) == self.maxlength - 1:23             return True24         else:25             return False26 27     def Listclear(self):28         if self.Listempty():29             raise Exception("ListIsEmpty")30         else:31             self.list = []32 33     def Listinsert(self,m,n):34         if self.Listfull():35             raise Exception("ListIsFull")36         else:37             if m < 0:38                 raise Exception("m is error")39             if m > len(self.list):40                 raise Exception(‘m is error 2‘)41             if (m >=0) and (m <= len(self.list)):42                 self.list.insert(m,n)43 44     def Listdelete(self,x):45         if self.Listempty():46             raise Exception(‘ListIsEmpty‘)47         else:48             if x < 0:49                 raise Exception(‘x is error1‘) 50             if x >= len(self.list):51                 raise Exception(‘x is error2‘)52             if (x >= 0) and (x < len(self.list)):53                 del self.list[x]54             55     def Listshow(self):56         print self.list57 58 if __name__ == "__main__":59 60     s = Linelist()61     s.Initlength(8,[0,1,4])62     s.Listinsert(6,‘a‘)63     s.Listshow()64     s.Listdelete(5)65     s.Listshow()