title: dictionary python with a csv file
body: <p>I'm new at all this coding but have lots of motivation even when things don't work.</p>
  
  <p>I'm trying to work on a dictionary with a CSV file. I get to open and edit a new file but I think I'm missing something when trying to read from the csv file.
  I'm getting errors in rows 39-41 i'm probably doing something wrong but what is it?
  Here is the code:</p>
  
  <pre><code>import csv
  import os
  import os.path
  
  phonebook = {}
  def print_menu():
      print('1. Print phone book')
      print('2. add phone book')
      print('3. look for number using first name only')
      print('4. look by last name')
      print('5. exit')
      print()
  
  menu_selection = 0
  
  while menu_selection != 5:
  
      if os.path.isfile('my_phonebook.csv') == True:  
          csv_file = open('my_phonebook.csv', 'a', newline = '')
          writer = csv.writer(csv_file)
      else:
          csv_file = open('my_phonebook.csv', 'w', newline = '')
          writer = csv.writer(csv_file)
          headers = ['first_name','last_name','phone_number']
          writer.writerow(headers)
      print_menu()
      menu_selection = int(input('type menu selection number'))
  
      if menu_selection == 2:  #add list in phone book
          first_name = input("enter first name: ")
          last_name = input("enter last name: ")
          phone_number = input("enter phone number: ")
          writer.writerow([first_name,last_name,phone_number])
          csv_file.close()
      elif menu_selection == 1: #print phone book
          print("phone book:")
          listGen = csv.reader(csv_file, delimiter=' ', quotechar='|') #error starts here and in the next two rows...
          for row in csv_file:
              print(row)
      elif menu_selection == 3: #look for number using first name only
          print('look up number')
          first_name = input('first name:')
          if first_name in phonebook:
              print('the number is', phonebook[phone_number])
          else:
              print('name not found')
      elif menu_selection == 4: #print all details of last name entered
          print('search by last name')
          last_name = input('please enter last name: ')
          for row in csv_file:
              print(row)
  </code></pre>