linux安装他版本python时遇到的问题及解决方法

因为学习需要以及centos6.9中的python版本过低，所以更新了下python

以下是脚本

#coding=utf-8

import os
import sys
if os.getuid() == 0:
    pass
else:
    print '当前用户不是root用户，请以root用户执行脚本'
    sys.exit(1)

version = raw_input('请输入你想输入的python脚本（2.7/3.5)')
if version == '2.7':
    url = 'https://www.python.org/ftp/python/2.7.12/Python-2.7.12.tgz'
elif version == '3.5':
    url = 'https://www.python.org/ftp/python/3.5.2/Python-3.5.2.tgz'
else:
    print '您输入的版本号有误，请输入2.7或者3.5'
    sys.exit(1)

cmd = 'wget ' +url
res = os.system(cmd)
if res !=0:
    print'下载源码失败，请检查网络'
    sys.exit(1)

if version =='2.7':
    package_name = 'Python-2.7.12'
else:
    package_name = 'Python-3.5.2'
cmd = 'tar xf '+package_name+'.tgz'
res = os.system(cmd)
if res != 0:
    os.system('rm '+package_name+'.tgz') 
    print '解压源码包失败，请重新运行这个脚本下载源码包'
    sys.exit(1)
cmd = 'cd '+package_name+' && ./configure --prefix=/usr/local/python && make && make install'
res = os.system(cmd)
if res !=0:
    print '编译python源码失败，请检查是否缺少依赖库'
    sys.exit(1)

然后需要修改下/usr/bin/python,请根据自己安装目录位置修改

rm -f /usr/bin/python
ln -s /usr/local/python/bin/python /usr/bin/python

因为修改了/usr/bin/python,所以需要修改下yum

vim /usr/bin/yum
#!/usr/bin/python2.6  

我们会发现pip也不能用了，先去下载pip和setup-tools

wget https://pypi.python.org/packages/c4/44/e6b8056b6c8f2bfd1445cc9990f478930d8e3459e9dbf5b8e2d2922d64d3/pip-9.0.3.tar.gz#md5=b15b33f9aad61f88d0f8c866d16c55d8

wget https://pypi.python.org/packages/72/c2/c09362ab29338413ab687b47dab03bab4a792e2bbb727a1eb5e0a88e3b86/setuptools-39.0.1.zip#md5=75310b72ca0ab4e673bf7679f69d7a62

tar xvf pip-9.0.3.tar.gz
unzip setuptools-39.0.1.zip

#先安装setup-tools

cd setup-tools-39.0.1
python setup.py install

会遇到错误Compression requires the (missing) zlib module

解决方法：

yum install zlib
yum install zlib-devel 

wget http://rpmfind.net/linux/RPM/index.html

#下载成功后，进入python2.7的目录，重新执行

cd Python-2.7.12

make 

make install 

重新执行,安装setup-tools

cd setup-tools-39.0.1
python setup.py install

安装pip

cd pip-9.0.3
python setup.py install
rm /usr/bin/pip
ln -s /usr/local/python/bin/pip /usr/bin/pip