title: How to find and implement all the abstract methods in PyCharm?
body: <p>Is there a smart way to find and implement all the abstract methods in PyCharm Community Edition?</p>
  
  <p>I've found there's a "Implement methods (<kbd>Ctrl</kbd>+<kbd>I</kbd>)", but it's always been disabled. </p>
  
  <p>For example:</p>
  
  <pre><code>class Base():
    @abstractmethod
    def abstract1(self):
       raise NotImplementedError
  
    @abstractmethod
    def abstract2(self):
       raise NotImplementedError
  
    def method1(self):
      print("ok")
  </code></pre>
  
  <p>If I write a sub class, is there a smart way to implement <code>abstract1</code> and <code>abstract2</code> in my sub class, but not <code>method1</code>?</p>
  
  <p>Because I found use <kbd>Ctrl</kbd>+<kbd>O</kbd> will need to read the source before.</p>