title: Comparing letters in list with string in a list python
body: <p>I have a list lets say:</p>
  
  <p>DIRECTION_LETTERS=['u', 'd' ,'r' , 'l', 'w', 'x', 'y', 'z']</p>
  
  <p>Now the other parameter of mine is like arguement, I write in </p>
  
  <p>udl and it returns ['udl'] </p>
  
  <p>so lets say another list arg_list = ['udl'] </p>
  
  <p>I want to check if u and d and l is in this list or i want to check if none of the letters in my direction letters list in the arg list
  to make it print error msg I have tried this:</p>
  
  <pre><code>    for letter in DIRECTION_LETTERS:
      for char in arg_list[4]:
          if letter in arg_list[4][0]:
              continue
          else:
              print (ERROR_MESSAGE_DIRECTIONS)
              return False
  
  
  return True
  </code></pre>