为什么 web2py 在启动时崩溃？

我正在尝试让 web2py 在 Ubuntu 机器上运行。所有文档似乎都表明要在 *nix 系统上运行它，您需要下载源代码并执行以下操作：

蟒蛇 web2py.py

我抓住了source http://www.web2py.com/examples/static/web2py_src.zip（稳定源，不是主干，版本1.99.4）并尝试了上述操作，但在输入服务器密码后我得到（在终端中）：

$ python web2py.py 
web2py Web Framework
Created by Massimo Di Pierro, Copyright 2007-2011
Version 1.99.4 (2011-12-14 14:46:14) stable
Database drivers available: google
Starting hardcron...
WARNING:web2py.cron:WEB2PY CRON: Disabled because no file locking
please visit:
    http://127.0.0.1:8000
starting browser...
failed to create drawable
DEBUG: connect attempt 0, connection error:
Traceback (most recent call last):
  File "/home/aparkin/Downloads/web2py/gluon/dal.py", line 4736, in __init__
    self._adapter = ADAPTERS[self._dbname](*args)
  File "/home/aparkin/Downloads/web2py/gluon/dal.py", line 1634, in __init__
    raise RuntimeError, "Unable to import driver"
RuntimeError: Unable to import driver
WARNING:web2py.cron:WEB2PY CRON: Disabled because no file locking
DEBUG: connect attempt 1, connection error:
Traceback (most recent call last):
  File "/home/aparkin/Downloads/web2py/gluon/dal.py", line 4736, in __init__
    self._adapter = ADAPTERS[self._dbname](*args)
  File "/home/aparkin/Downloads/web2py/gluon/dal.py", line 1634, in __init__
    raise RuntimeError, "Unable to import driver"
RuntimeError: Unable to import driver
DEBUG: connect attempt 2, connection error:
Traceback (most recent call last):
  File "/home/aparkin/Downloads/web2py/gluon/dal.py", line 4736, in __init__
    self._adapter = ADAPTERS[self._dbname](*args)
  File "/home/aparkin/Downloads/web2py/gluon/dal.py", line 1634, in __init__
    raise RuntimeError, "Unable to import driver"
RuntimeError: Unable to import driver
DEBUG: connect attempt 3, connection error:
Traceback (most recent call last):
  File "/home/aparkin/Downloads/web2py/gluon/dal.py", line 4736, in __init__
    self._adapter = ADAPTERS[self._dbname](*args)
  File "/home/aparkin/Downloads/web2py/gluon/dal.py", line 1634, in __init__
    raise RuntimeError, "Unable to import driver"
RuntimeError: Unable to import driver
DEBUG: connect attempt 4, connection error:
Traceback (most recent call last):
  File "/home/aparkin/Downloads/web2py/gluon/dal.py", line 4736, in __init__
    self._adapter = ADAPTERS[self._dbname](*args)
  File "/home/aparkin/Downloads/web2py/gluon/dal.py", line 1634, in __init__
    raise RuntimeError, "Unable to import driver"
RuntimeError: Unable to import driver

然后在浏览器中我得到：

Internal error
Ticket issued: welcome/127.0.0.1.2012-.....[abbreviated]

有什么建议么？我正在运行 Python 2.7.1+。我在其他地方读到，您还需要安装 pyschopg2 才能运行 web2py，并且我已经确认这实际上也已安装（我做了一个sudo apt-get install python-psycopg2并得到“python-psycopg2已经是最新版本”）。

我刚刚下载，web2py 在 ubuntu、python 2.7.2+ 中运行正常

bruce@vaiubuntu:~/下载/web2py$ python web2py.py

web2py Web Framework
Created by Massimo Di Pierro, Copyright 2007-2011
Version 1.99.4 (2011-12-14 14:46:14) stable
Database drivers available: SQLite3, pymysql, PostgreSQL
Starting hardcron...

您是否尝试在 appengine 环境中运行 web2py？

你的Python中的SQLITE模块工作正常吗？

可能是权限问题，您的用户有权限写入 web2py/* 文件夹吗？