CentOS中使用Python遇到的几个问题

本网站用的阿里云ECS,推荐大家用。自己搞个学习研究也不错
用python搞了一个从excel中读取cobbler节点信息并加入cobbler中的脚本,运行的过程中出了不少问题,这里记录下来,方便日后查找!

相关阅读:

CentOS 6.4上安装Python 2.7.5 http://www.linuxidc.com/Linux/2013-06/85968.htm

《Python核心编程 第二版》.(Wesley J. Chun ).[高清PDF中文版] http://www.linuxidc.com/Linux/2013-06/85425.htm

一、CentOS中安装python,yum install python,我通过这个命令安装python,默认安装的是2.6的版本,但是当我把python 2.6安装完成后,发现cobbler的WEB管理页面无法打开了,查看apahce的错误日志:

[Sun Jul 07 20:13:01 2013] [error] [client 192.168.21.94] ImportError: cannot import name urandom
[Sun Jul 07 20:13:02 2013] [error] [client 192.168.21.94] File does not exist: /var/www/html/favicon.ico
[Sun Jul 07 20:31:09 2013] [error] [client 192.168.21.94] mod_wsgi (pid=10816): Target WSGI script ‘/usr/share/cobbler/web/cobbler.w
sgi’ cannot be loaded as Python module.
[Sun Jul 07 20:31:09 2013] [error] [client 192.168.21.94] mod_wsgi (pid=10816): Exception occurred processing WSGI script ‘/usr/shar
e/cobbler/web/cobbler.wsgi’.
[Sun Jul 07 20:31:09 2013] [error] [client 192.168.21.94] Traceback (most recent call last):
[Sun Jul 07 20:31:09 2013] [error] [client 192.168.21.94]  File “/usr/share/cobbler/web/cobbler.wsgi”, line 9, in
[Sun Jul 07 20:31:09 2013] [error] [client 192.168.21.94]    import django.core.handlers.wsgi
[Sun Jul 07 20:31:09 2013] [error] [client 192.168.21.94]  File “/usr/lib/python2.6/site-packages/django/core/handlers/wsgi.py”, li
ne 10, in
[Sun Jul 07 20:31:09 2013] [error] [client 192.168.21.94]    from django import http
[Sun Jul 07 20:31:09 2013] [error] [client 192.168.21.94]  File “/usr/lib/python2.6/site-packages/django/http/__init__.py”, line 12
3, in
[Sun Jul 07 20:31:09 2013] [error] [client 192.168.21.94]    from django.utils.http import cookie_date
[Sun Jul 07 20:31:09 2013] [error] [client 192.168.21.94]  File “/usr/lib/python2.6/site-packages/django/utils/http.py”, line 7, in
 
[Sun Jul 07 20:31:09 2013] [error] [client 192.168.21.94]    from email.Utils import formatdate
[Sun Jul 07 20:31:09 2013] [error] [client 192.168.21.94]  File “/usr/lib64/python2.6/email/__init__.py”, line 79, in __getattr__
[Sun Jul 07 20:31:09 2013] [error] [client 192.168.21.94]    __import__(self.__name__)
[Sun Jul 07 20:31:09 2013] [error] [client 192.168.21.94]  File “/usr/lib64/python2.6/email/utils.py”, line 27, in
[Sun Jul 07 20:31:09 2013] [error] [client 192.168.21.94]    import random
[Sun Jul 07 20:31:09 2013] [error] [client 192.168.21.94]  File “/usr/lib64/python2.6/random.py”, line 47, in
[Sun Jul 07 20:31:09 2013] [error] [client 192.168.21.94]    from os import urandom as _urandom

缺少urandom模块,python2.6版本里默认没有这个模块,随即将python升级到2.7版本。

升级过程:

1、下载Python 2.7源码:

wget http://www.python.org/ftp/python/2.7.2/Python-2.7.2.tgz

下载

2、解压源码包:

tar -zxvf Python-2.7.2.tgz

3、编译:

cd Python-2.7.2

./configure  –prefix=/usr

4、make&&make install

安装完成后测试web界面可以正常打开了,但是使用yum安装软件的时候会发现不能使用,原因是yum与python有依赖关系,yum是急于python写的,运行yum命令时会调用pyton;

vi /usr/bin/yum

将#!/usr/bin/pyton 改成:#!/usr/bin/pyton2.6,改成你系统默认的版本即可

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