title: How to pdb Python code with input?
body: <p>I'm debugging Python code with pdb.
  The code need input from stdin, like:</p>
  
  <pre><code>python -m pdb foo.py &lt; bar.in
  </code></pre>
  
  <p>Then the pdb will accept the bar.in as commands.
  How to tell pdb that the input is for foo.py and not for pdb?</p>