title: python TypeError: frozenset expected at most 1 arguments, got 4
body: <p>I'm getting this error when trying to make a frozen set:</p>
  
  <pre><code>class Transcriber:
  
      DNA_BASES = frozenset('A','T','G','C')
  ... 
  </code></pre>
  
  <p>And this is the Traceback:</p>
  
  <pre><code>~/python/project5$ python wp_proj5.py 
  Traceback (most recent call last):
    File "wp_proj5.py", line 5, in &lt;module&gt;
      class Transcriber:
    File "wp_proj5.py", line 7, in Transcriber
      DNA_BASES = frozenset('A','T','G','C')
  TypeError: frozenset expected at most 1 arguments, got 4
  </code></pre>
  
  <p>What is wrong here? Can't I initialize a frozenset with more than one string? </p>