linux下將Python自帶版本（2.6.6）升級到2.7.3

1.查看python版本

python
Python 2.6.6 (default, Mar 15 2019, 00:32:28)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-23)] on linux2
Type “help”, “copyright”, “credits” or “license” for more information.

2.下載2.7.3版本

wget http://python.org/ftp/python/2.7.3/Python-2.7.3.tgz

3.解壓

tar xvf Python-2.7.3.tar.bz2

4.編譯安裝

./configure --prefix=/usr/local/python27
make
make install

安裝過程中遇到no acceptable C compiler found in $PATH when installing python問題，yum安裝依賴庫gcc

yum install gcc

5.更改新版本Python鏈接

mv /usr/bin/python /usr/bin/python2.6.6
ln -s /usr/local/python27/bin/python /usr/bin/python #軟鏈接

6.查看新版本

python
Python 2.7.3 (default, Mar 15 2019, 00:32:28)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-23)] on linux2
Type “help”, “copyright”, “credits” or “license” for more information.

7.新安裝python之後，yum無法使用，需要更改一下Python指定
修改/usr/bin/yum文件，將第一行的/usr/bin/python替換爲/usr/bin/python2.6.6

vim /usr/bin/yum
#!/usr/bin/python2.6.6 #修改爲舊版本

8.python執行出現退格鍵亂碼問題
1)安裝readline開發包
2)在新版本Python中重新編譯Python

yum install readline-devel.x86_64
到python目錄下重新編譯，make install