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:

1 tar -xvf Python-2.7.4.tgz
2 cd Python-2.7.4
3 ./configure --prefix=/usr/local/python2.7
4 make
5 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-9.0.1.tar.gz
cd pip-9.0.1
python setup.py install

 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

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

python2.7  No module named ‘_sqlite3′ 方案解决

>>> import sqlite3
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/opt/Python-3.5.0/python350/lib/python3.5/sqlite3/__init__.py", line 23, in <module>
    from sqlite3.dbapi2 import *
  File "/opt/python-3.5.0/python350/lib/python3.5/sqlite3/dbapi2.py", line 27, in <module>
    from _sqlite3 import *

　

1

 find / -name _sqlite*.so　

/usr/lib64/python2.6/lib-dynload/_sqlite3.so

2#

whereis python2.7

python2: /usr/bin/python2.7 /usr/bin/python2 /usr/bin/python2.6 /usr/lib/python2.6 /usr/lib64/python2.6 /usr/local/bin/python2.7 /usr/local/bin/python2.7-config /usr/local/bin/python2 /usr/local/lib/python2.7 /usr/include/python2.6

3

cp /usr/lib64/python2.6/lib-dynload/_sqlite3.so /usr/local/lib/python2.7/lib-dynload/_sqlite3.so

　　

　参考:https://www.cnblogs.com/cnlihao/p/7069776.html

    参考:https://www.cnblogs.com/saolv/p/7041067.html