1.準備編譯環境gcc，沒有gcc編譯環境會出現報錯，如下：

[[email protected] ~]# cd Python-2.7.11
[[email protected] Python-2.7.11]# ./configure --prefix=/usr/local/python27
checking build system type... x86_64-unknown-linux-gnu
checking host system type... x86_64-unknown-linux-gnu
checking for --enable-universalsdk... no
checking for --with-universal-archs... 32-bit

2.去官網下載要安裝的對應版本的python的原始碼

你可以選擇你要下載的版本，用wget指令來下載相應的原始碼

3.解壓下載的程式碼包

4.配置

1)查詢configure檔案

2)進行配置

5.編譯

（如果沒有其他特殊需求，安裝就到此結束了，輸入pythonx.x即可以進入你剛剛安裝的python開發環境）

6.替換以前的python預設版本（建立新的軟連線）

你直接輸入python就是你最新安裝的python新版本，要想用以前的版本，可以輸入pythonx.x來啟動！

7.升級完python之後，yum可能無法正常使用，提示如下：

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:
2.7.3 (default, Jul 15 2014, 16:52:36) 
[GCC 4.1.2 20080704 (Red Hat 4.1.2-48)]
If you cannot solve this problem yourself, please go to 
the yum faq at:
  http://wiki.linux.duke.edu/YumFaq

應該是yum和Python是依賴關係，yum是python的模組，所以需要修改yum來解決：

1、修改yum
# vim /usr/bin/yum 

將 #!/usr/bin/python 改成  #!/usr/bin/python2.4
【儲存並退出】

2. 再測試yum安裝，成功；

==========================================================

pip安裝：

1、指令碼安裝

$ curl -O https://raw.github.com/pypa/pip/master/contrib/get-pip.py

$ python get-pip.py

$ sudo yum install python-pip

$ sudo apt-get install python-pip

指令碼安裝過程中，可能會遇到兩個問題：

（1）zlib、zlib-devel沒有安裝，報錯如下：

[[email protected] home]# python get-pip.py 
Traceback (most recent call last):
  File "get-pip.py", line 20061, in <module>
    main()
  File "get-pip.py", line 194, in main
    bootstrap(tmpdir=tmpdir)
  File "get-pip.py", line 82, in bootstrap
    import pip
zipimport.ZipImportError: can't decompress data; zlib not available

解決方法：
1、安裝依賴zlib、zlib-devel
2、重新編譯安裝Python

1. ./configure 
2. 編輯Modules/Setup檔案 
3. 找到下面這句，去掉註釋 
4. #zlib zlibmodule.c -I$(prefix)/include -L$(exec_prefix)/lib -lz 
5. 重新編譯安裝：make & make install

pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
Collecting pip
  Could not fetch URL https://pypi.python.org/simple/pip/: There was a problem confirming the ssl certificate: Can't connect to HTTPS URL because the SSL module is not available. - skipping
  Could not find a version that satisfies the requirement pip (from versions: )
No matching distribution found for pip

解決方案如下：

[[email protected] ~]# python2.7.5
Python 2.7.5 (default, Jun 3 2013, 11:08:43) 
[GCC 4.1.2 20080704 (Red Hat 4.1.2-54)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import ssl
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/python27/lib/python2.7/ssl.py", line 60, in <module>
import _ssl # if we can't import it, let the error propagate
ImportError: No module named _ssl
>>>

2. 檢視openssl安裝包，發現缺少openssl-devel包
[[email protected] ~]# rpm -aq|grep openssl
openssl-0.9.8e-20.el5
openssl-0.9.8e-20.el5
[[email protected] ~]#

3. yum安裝openssl-devel
[[email protected] ~]# yum install openssl-devel -y
#檢視安裝結果
[[email protected] ~]# rpm -aq|grep openssl
openssl-0.9.8e-26.el5_9.1
openssl-0.9.8e-26.el5_9.1
openssl-devel-0.9.8e-26.el5_9.1
openssl-devel-0.9.8e-26.el5_9.1

4. 重新編譯python
#修改Setup檔案
vi /usr/software/Python-2.7.5/Modules/Setup
#修改結果如下：
# Socket module helper for socket(2)
_socket socketmodule.c timemodule.c

# Socket module helper for SSL support; you must comment out the other
# socket line above, and possibly edit the SSL variable:
#SSL=/usr/local/ssl
_ssl _ssl.c \
-DUSE_SSL -I$(SSL)/include -I$(SSL)/include/openssl \
-L$(SSL)/lib -lssl -lcrypto

5. 重新編譯
make
make install

6. 測試，已可正常使用。
[[email protected] ~]# python2.7.5
Python 2.7.5 (default, Jun 3 2013, 14:56:13) 
[GCC 4.1.2 20080704 (Red Hat 4.1.2-54)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import ssl
>>>

pip安裝完成後，通過一下指令檢視版本：

 pip -V　　#檢視pip版本