python program to manipulate a list of items using class -

i newbie python oop concept. need write program manipulate list of items(add, delete , display) using class. without class got output in way :

def add():     b=input("how many inputs? : ")     print b     if b==1:         in1=input("enter item : ")         a.append(in1)     else:         in2=input("enter items : ")         a.extend(in2)     print  def delete():     c=input("which item delete? ")     global     a=[x x in if x != c]     print  def display():           print  ans=true global a=[1,2,3,5,2] while ans:     print ("""     1.add items     2.delete items     3.display items     4.exit/quit     """)     ans=raw_input("what do? ")      if ans=="1":          add()     elif ans=="2":         delete()     elif ans=="3":         display()      elif ans=="4":         print("\n goodbye")          exit()     else:       print("\n not valid choice try again")  

can me write same code using class?

just put functions in class....

the advantage class approach can have multiple lists being manipulated @ once, , when use class, doesn't depend on arbitrary global list name have picked.

additionally, using input method. seems you're using python 2.7 (judging print statements), you should using raw_input. input tries eval gets back, whereas want raw string user has entered, raw_input returns.

 class itemlist:         def __init__(self, list):             self.a = list          def add(self):             b=raw_input("how many inputs? : ")             print b             if b==1:                 in1=raw_input("enter item : ")                 self.a.append(in1)             else:                 in2=raw_input("enter items : ")                 self.a.extend(in2)             print self.a          def delete(self):             c=raw_input("which item delete? ")             self.a=[x x in if x != c]             print self.a          def display(self):                   print self.a   ans = true a=[1,2,3,5,2] mylist = itemlist(a) while ans:     print ("""     1.add items     2.delete items     3.display items     4.exit/quit     """)     ans=raw_input("what do? ")      if ans=="1":          mylist.add()     elif ans=="2":         mylist.delete()     elif ans=="3":         mylist.display()      elif ans=="4":         print("\n goodbye")          exit()     else:       print("\n not valid choice try again")