title: how to print the default value if argument is None in python
body: <p>[sample.py]</p>
  
  <pre><code>def f(name='Hello Guest'):
      print(name)
  
  
  def A(name=None):    
      f(name)
  
  A()
  </code></pre>
  
  <p>Expected Output: 'Hello Guest'</p>
  
  <p>Current Output: None</p>
  
  <p>I'm expecting the answers by <strong>without</strong> using much more codes like '<code>name = name if name is not None else some_default_value</code>'</p>
  
  <p>Thanks in advance!</p>