title: how to fix ImportError: No module named 'passlib
body: <p>how to fix ImportError: No module named 'passlib</p>
  
  <pre><code>/Downloads/odoo-12.0$ ./odoo-bin
  
  Traceback (most recent call last):
    File "./odoo-bin", line 5, in &lt;module&gt;
      import odoo
    File "/home/omprakash/Downloads/odoo-12.0/odoo/__init__.py", line 125, in &lt;module&gt;
      from . import modules
    File "/home/omprakash/Downloads/odoo-12.0/odoo/modules/__init__.py", line 8, in &lt;module&gt;
      from . import db, graph, loading, migration, module, registry
    File "/home/omprakash/Downloads/odoo-12.0/odoo/modules/graph.py", line 10, in &lt;module&gt;
      import odoo.tools as tools
    File "/home/omprakash/Downloads/odoo-12.0/odoo/tools/__init__.py", line 8, in &lt;module&gt;
      from .config import config
    File "/home/omprakash/Downloads/odoo-12.0/odoo/tools/config.py", line 18, in &lt;module&gt;
      from passlib.context import CryptContext
  
  ImportError: No module named 'passlib'
  </code></pre>