class Parent:
    students = dict()
    try:
        n =input("Enter Number of student:")
        if  n.isalnum()==True:
         except ValueError:
         print("valueerror")
        elif:
         n.isalpha==True
          except TypeError:
          print("typeerror")
    try:
        n.isdecimal==True
    except TypeError:
        print("type error")
    except KeyboardInterrupt:
        print("keyboard interrupt")
    except IndentationError:
        print("indentation error")
    except IndexError:
        print("index error")
    def getNumberOfEnterStudent(self):
        return self.n