Centos上安装python3.5以上版本

一、准备工作：

　　yum install zlib-devel

　　yum install openssl-devel

二、安装python3.5

　　wget https://www.python.org/ftp/python/3.5.3/Python-3.5.3.tgz

　　tar -zxvf Python-3.5.3.tgz

　　cd Python-3.5.3

　　./configure --prefix=/usr/local/python3 --enable-shared

　　make && make install

三、替换系统中的python

　　mv /usr/bin/python  python.bak

　　ln -s /usr/local/python3.5/bin/python3 /usr/bin/python

　　由于更改系统默认的python会影响yum，需修改如下两个文件：

　　/usr/bin/yum和/usr/libexec/urlgrabber-ext-down

 Known problems with Fedora Linux and Python 3 version: Error message:
 # yum search package
   File "/usr/bin/yum", line 30
     except KeyboardInterrupt, e:
                             ^
 SyntaxError: invalid syntax
 If you set python3 globally on your system change the yumshebang to python2:
 # vi /usr/bin/yum
 FROM:
 #!/usr/bin/python
 TO:
 #!/usr/bin/python2.7
 Similarly: Error message:
 Downloading packages:
   File "/usr/libexec/urlgrabber-ext-down", line 28
     except OSError, e:
                   ^
 SyntaxError: invalid syntax
 Exiting on user cancel
 The issue is also related to Python 3 set as a default global version. To fix this error update/usr/libexec/urlgrabber-ext-down script:
 # vi /usr/libexec/urlgrabber-ext-down
 FROM:
 #!/usr/bin/python
 TO:
 #!/usr/bin/python2.7

四、安装setuptools

　　wget --no-check-certificate  https://pypi.python.org/packages/source/s/setuptools/setuptools-19.6.tar.gz#md5=c607dd118eae682c44ed146367a17e26

　　tar -zxvf setuptools-19.6.tar.gz

　　cd setuptools-19.6

　　python3 setup.py build

　　python3 setup.py install

　　(如有报错： RuntimeError: Compression requires the (missing) zlib module，则需要安装yum install zlib-devel，安装后要重新编译 python3.5:

make && make install)

五、安装pip

　　wget --no-check-certificate  https://pypi.python.org/packages/source/p/pip/pip-8.0.2.tar.gz#md5=3a73c4188f8dbad6a1e6f6d44d117eeb

　　tar -zxvf pip-8.0.2.tar.gz

　　cd pip-8.0.2

　　python3 setup.py build

　　python3 setup.py install

　　使用pip安装包测试：

　　　　如报错，则缺少yum install openssl-devel,安装完成后一样需要重新编译python3.5（make&&make install）

[root@localhost pip-9.0.1]# python -m pip install paramiko
pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
Collecting paramiko
  Could not fetch URL https://pypi.python.org/simple/paramiko/: 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 paramiko (from versions: )
No matching distribution found for paramiko

　　

　　参考：

　　　　http://www.tuicool.com/articles/j2ueiir

　　　　http://www.cnblogs.com/Yemilice/p/6217250.html