title: Python - LMDB has no attribute open
body: <p>I'm traying to use lmbd in python. </p>
  
  <p>The thing is that i get the same error when the code is running </p>
  
  <p><strong>In this line : <code>env = lmdb.open('/latas/nuevo.lmdb', map_size=map_size)</code></strong></p>
  
  <p>But that only happens when I run the code from a file, when I typed the code through the python prompt there is no issue.</p>
  
  <pre><code>  File "C:\Users\Jaime\Desktop\lmdb.py", line 20, in &lt;module&gt;
      env = lmdb.open('latas', max_dbs = 10)
  
  AttributeError: module 'lmdb' has no attribute 'open'
  </code></pre>
  
  <p>Any idea of what's happening there?</p>
  
  <p>Thank you.</p>