title: missing 1 required positional argument: 'key'
body: <pre><code>class Keys():
      def __init__(self):
          self.key_list = {1:"one", 2:"two", 3:"three"}
      def get_name(self, key):
         self.ddd = key
  
  key1 = Keys
  key1.get_name(1)
  </code></pre>
  
  <p>Why, after starting this code, do I get this error:</p>
  
  <pre><code>Traceback (most recent call last):
    File "class.py", line 8, in &lt;module&gt;
      key1.get_name(1)
  TypeError: get_name() missing 1 required positional argument: 'key'
  </code></pre>
  
  <p>I am using Python 3.</p>