title: What is the best/suggested pythonic way (Ver: 2.7) to handle customization logic
body: <p>My case is that:</p>
  
  <pre><code>def main():
      generic_process_000()
      generic_process_001()
      customized_process_000()
      generic_process_002()
  </code></pre>
  
  <p>As shown above, I need to implement a Python script that have some generic logic for all clients and some customization logic for specific clients.</p>
  
  <p>What I want to do is that when running the Python script with client code as the command-line argument and the client code will determine what should be done at the customization logic "customized_process_000()"</p>
  
  <p>I know that it can be achieved by simple if-then-else statement. But just want to find out if there are any better ways to do so. As the Admin does not like external libs, if possible, please suggest ways which can be done by built-in libs. But if not, external libs are also ok.</p>
  
  <p>Highly appreciate if any simple code example can be provided together.</p>