python版本升级及pip部署方法

Python版本升级

CentOS 6.3自带的Python版本为2.6,首先需要升级到2.7版本。由于旧版本的Python已被深度依赖,所以不能卸载原有的Python,只能全新安装。

1.下载Python-2.7.4.tgz

wget http://python.org/ftp/python/2.7.4/Python-2.7.4.tgz

2. 解压安装,命令如下:

 tar -xvf Python-2.7.4.tgz
cd Python-2.7.4
./configure --prefix=/usr/local/python2.7
make
make install

3. 创建链接来使系统默认python变为python2.7

mv /usr/bin/python /usr/bin/python.old
ln -s /usr/local/python2.7/bin/python2.7 /usr/bin/python

4. 查看Python版本

python –V

5. 修改yum配置(否则yum无法正常运行)

vim /usr/bin/yum

将第一行的#!/usr/bin/python修改为系统原有的python版本地址#!/usr/bin/python2.6

至此CentOS6.3系统Python已成功升级至2.7.4版本

Linux下python2.7安装pip

首先下载并安装setuptools:

#wget --no-check-certificate https://bootstrap.pypa.io/ez_setup.py
#python ez_setup.py --insecure

再到python官网下载pip安装包,解压到某个位置,我这里下载的是9.0.0版本,然后就可以安装了:

wget https://pypi.python.org/packages/11/b6/abcb525026a4be042b486df43905d6893fb04f05aac21c32c638e939e447/pip-9.0.1.tar.gz#md5=35f01da33009719497f01a4ba69d63c9
tar -xf pip-9.0..tar.gz
cd pip-9.0.
python setup.py install

另一种安装pip方法:

Pip是一个安装和管理python包的工具。

安装方法如下:

1. 下载pip,地址 https://bootstrap.pypa.io/get-pip.py

2. 执行安装命令

yum install setuptool zlib* -y
python get-pip.py

3. 创建连接(否则会报错提示“命令不存在”)

ln -s /usr/local/python2.7/bin/pip /usr/bin/pip

测试:

[root@localhost ~]# pip install redis
Collecting redis
/usr/local/python2.7/lib/python2.7/site-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:90: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
InsecurePlatformWarning
Downloading redis-2.10.5-py2.py3-none-any.whl (60kB)
100% |################################| 61kB 759kB/s
Installing collected packages: redis
Successfully installed redis-2.10.5  

至此pip安装完成!

如果安装pip时报如下错误:ImportError: cannot import name HTTPSHandle

执行 yum install sqlite-devel

参考文档:http://www.cnblogs.com/smail-bao/p/6483759.html

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