新建项目设置PostgreSQL数据库时报以下错误，寻求帮助

[czg_e@…]

Creating and Initializing Project
Initenv for '/home/www/trac/filter' failed. 
 Failed to create environment.
Cannot load Python bindings for PostgreSQL
Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/Trac-0.11.7-py2.4.egg/trac/admin/console.py", line 583, in do_initenv
    options=options)
  File "/usr/lib/python2.4/site-packages/Trac-0.11.7-py2.4.egg/trac/env.py", line 207, in __init__
    self.create(options)
  File "/usr/lib/python2.4/site-packages/Trac-0.11.7-py2.4.egg/trac/env.py", line 341, in create
    DatabaseManager(self).init_db()
  File "/usr/lib/python2.4/site-packages/Trac-0.11.7-py2.4.egg/trac/db/api.py", line 85, in init_db
    connector, args = self._get_connector()
  File "/usr/lib/python2.4/site-packages/Trac-0.11.7-py2.4.egg/trac/db/api.py", line 134, in _get_connector
    raise TracError(connector.error)
TracError: Cannot load Python bindings for PostgreSQL
Initenv for '/home/www/trac/filter' failed. 
 1
Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/Trac-0.11.7-py2.4.egg/trac/admin/console.py", line 588, in do_initenv
    sys.exit(1)
SystemExit: 1

[Christian Boos]

Cannot load Python bindings for PostgreSQL

Which means you need to install ​psycopg2 before trying to create a Trac environment using a PostgreSQL database… This is an InstallationIssue.