title: Python27(win): import daemon, but there is an error: No module named pwd
body: <p>1) <strong>pip install daemon.</strong> </p>
  
  <p><a href="https://i.stack.imgur.com/ek9dK.png" rel="noreferrer"><img src="https://i.stack.imgur.com/ek9dK.png" alt="enter image description here"></a></p>
  
  <p>2) <strong>Open windows cmd and input: python, then input： import daemon
  the terminal show</strong></p>
  
  <pre><code>&gt;&gt;&gt; import daemon
  Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
    File "C:\Python27\lib\site-packages\daemon\__init__.py", line 42, in &lt;module&gt;
      from .daemon import DaemonContext
    File "C:\Python27\lib\site-packages\daemon\daemon.py", line 25, in &lt;module&gt;
      import pwd
  ImportError: No module named pwd
  &gt;&gt;&gt;
  </code></pre>
  
  <p>3) <strong>pip install pwd</strong></p>
  
  <p><strong>what's the problem?????</strong></p>