Centos6.5 python升級成2.7版本出現的一些問題解決方法

由於功能及程序依賴，需要將Centos上的python從2.6升級成2.7，把碰到的一些問題記錄如下：

安裝好2.7后將原來的/usr/bin/python改成/usr/bin/python26，並將2.7的bin目錄加入執行路徑

 

Question1： 執行yum報No module named yum

[root@zejin240 ~]# yum list
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:

   No module named yum

Please install a package which provides this module, or
verify that the module is installed correctly.

It's possible that the above module doesn't match the
current version of Python, which is:
2.7.12 (default, Jul  6 2016, 18:40:00) 
[GCC 4.4.7 20120313 (Red Hat 4.4.7-17)]

If you cannot solve this problem yourself, please go to 
the yum faq at:
  http://yum.baseurl.org/wiki/Faq

 

解決方法：

vi /usr/binyum

#!/usr/bin/python26

 

 

Question2: 執行pip時提示  ImportError: No module named pip

解決方法：python -m  ensurepip

 

 

Questions3:源碼安裝paramiko出現各種模塊找不到

解決方法：

pip install -I pycrypto
pip install -I paramiko