title: Python List object attribute 'append' is read-only
body: <p>as the title says, in python, I'm trying to make it so when someone types in a choice (in this case Choice13) then it deletes the old password from the list passwords and adds the new one instead.</p>
  
  <pre><code>passwords = ['mrjoebblock' , 'mrjoefblock' , 'mrjoegblock', 'mrmjoeadmin' ]
  if choice == '3':
      password = raw_input('Welcome admin! I\'m going to need your password ')
          if password == 'mrjoeadmin':
              print('Welcome Mr. Joe!')
              Choice11 = raw_input('What would you like to do? Press 1 for changing your admin password, 2 for viewing a class\'s comments, or 3 for changing a class\'s password')
              if Choice11 == '1':
                  print('You have chosen to change your password! ')
                  Choice12 = raw_input('You will need to put in your current password to access this feature ')
                  if Choice12 == 'mrmajoeadmin':
                      Choice13 = raw_input('What would you like to change your password to? ')
                      passwords.remove('mrjoeadmin')
                      passwords.append = Choice13
  </code></pre>