Python

# -*- coding: UTF-8 -*-
class TeleBok():
  def __init__(self):
    self.TeleBokDic = {}

  def add(self, name, number, n):             #Skickar med name, number och n till funktionen.
    i = self.TeleBokDic
    if len(n) > 3:                            #Om längden på min input är större än 3 ord så skriver den felmeddelande.
      print "Too many inputs."
      return
    elif number in i.keys():                  #Om numret jag skriver in finns i dictionaryn så ger den error.
      print "Number is allready taken"
    else:                                     #Annars lägger den till nummer som nyckel och namnet som value i en lista i dictionaryn.
      self.TeleBokDic[number] = [name]
      print "Contact added!"

  def lookup(self, name, n):
    i = self.TeleBokDic
    k = 0
    if len(n) > 2:                            #Om längden på min input är större än 2 ord så skriver den felmeddelande.
      print "Too many inputs."
      return
    for key, value in i.items():              #En forloop där den kollar nyckel, värde i dictionaryns items.
      if name in value:                       #Om namnet jag skriver inn finns i något värde så sätter den ett nytt värde på k och sen printar namn och nummer.
        k = k + 1
        print "Name:", name, "\n", "Number:", key
    if k == 0:
      print "Contact not found"

  def alias(self, name, newname, n):
    i = self.TeleBokDic
    k = 0
    if len(n) > 4:
      print "Too many inputs."
      return
    for key, value in i.iteritems():
      if name in value:
        k = k + 1
    if k == 0:
      print "Contact not found"
      return

    elif k > 1 and len(n) != 4:
      print "There is more then one person with that name. Please enter the phonenumber."
      #return

    elif k > 1 and len(n) == 4:
      number = n[3]
      for key, value in i.items():
        if key == number:
          value.append(newname)
          print "Alias added"
          #return

    elif k == 1:
      for key, value in i.items():
        if name in value:
          value.append(newname)
          print "Alias added"
          #return

  def change(self, name, number, n):
    i = self.TeleBokDic
    k = 0
    if len(n) > 4:
      print "Too many inputs."
      return
    for key, value in i.items():
      if name in value:
        k = k + 1
    if k == 0:
      print "Contact not found"
      return
    elif k > 1 and len(n) != 4:
      print "There is more then one person with that name."
      return
    elif k > 1 and len(n) == 4:
      oldnr = n[3]
      for key, value in i.items():
        if key == oldnr:
          self.TeleBokDic[number] = value
          del self.TeleBokDic[key]
          print "Number changed."
          return
    elif k == 1:
      for key, value in i.items():
        if number in key:
          print "The number is allready taken"
          return
        if name in value:
          self.TeleBokDic[number] = value
          del self.TeleBokDic[key]
          print "Number changed."
          return

  def save(self, filename):
    file = open(filename, 'w')
    for key, value in self.TeleBokDic.items():
      line = key + ";" + ";".join(value) + "\n"
      file.write(line)
    file.close()
    print "Saved as:", filename

  def load(self, filename):
    TeleBokDic = {}
    file = open(filename, 'r')
    for line in file:
      line = line.split(";")
      line[-1] = line[-1].strip("\n")
      number = line[0]
      name = line[1:]
      self.TeleBokDic[number] = name
    file.close()
    print filename, "loaded"
    #print self.TeleBokDic

  def remove(self, name, n):
    i = self.TeleBokDic
    k = 0
    if len(n) > 3:
      print "Too many inputs."
      return
    for key, value in i.items():
      if name in value:
        k = k + 1
    if k == 0:
      print "Contact not found"
      return
    elif k > 1 and len(n) != 3:
      print "There is more then one person with that name."
      return
    elif k > 1 and len(n) == 3:
      number = n[2]
      for key, value in i.items():
        if key == number:
          del self.TeleBokDic[key]
          print "Contact deleted."
    elif k == 1:
      del self.TeleBokDic[key]
      print "Contact deleted."

  def prnt(self):
    print self.TeleBokDic

def main():
  n = True
  tb = TeleBok()
  while n:
    prompt = raw_input("Telefonbok>")
    n = prompt.split()

    try:
      function = n[0]
      if function == "add":
        tb.add(n[1], n[2], n)

      elif function == "lookup":
        tb.lookup(n[1], n)

      elif function == "alias":
        tb.alias(n[1], n[2], n)

      elif function == "change":
        tb.change(n[1], n[2], n)

      elif function == "save":
        tb.save(n[1])

      elif function == "print":
        tb.prnt()

      elif function =="load":
        tb.load(n[1])

      elif function =="remove":
        tb.remove(n[1], n)

      elif function == "quit":
        print("\n Goodbye")
        n = None

      else:
        print "Not valid choise, try again."

    except IndexError:
      print "Wrong input. Try again."
main()