请教python如何设置print等的帮助文档

ubuntu下
alex@alex-desktop:~$ python
Python 2.4.3 (#2, Apr 27 2006, 14:43:5
[GCC 4.0.3 (Ubuntu 4.0.3-1ubuntu5)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> help('print')

Sorry, topic and keyword documentation is not available because the Python
HTML documentation files could not be found.  If you have installed them,
please set the environment variable PYTHONDOCS to indicate their location.

On Debian GNU/{Linux,Hurd} systems you have to install the corresponding
pythonX.Y-doc package, i.e. python2.3-doc.

通过apt-get安装了python2.3-doc包
在.bashrc中设置好了PYTHONDOCS变量

帮助文档还是不能正常显示。

直接运行

$ env PYTHONDOCS=/usr/share/doc/python2.3-docs/html/ python
(python简明教程中实例)
可以正常显示

请教应该怎么解决？
1.应该怎么设置才能够直接运行python获取帮助，而不用前面的env命令。
2.$ env PYTHONDOCS=/usr/share/doc/python2.3-docs/html/ python
这个命令bash怎样解释？是先运行env PYTHONDOCS=/usr/share/doc/python2.3-docs/html/ 再运行python吗？

1. 你是怎么在.bashrc里设置的？
login以后用printenv PYTHONDOCS
检查PYTHONDOCS变量有没有设置上

2. 对