okanon/centos_pythoninstall.md

## centos_pythoninstall.md

      
    Raw
  

              centos_pythoninstall.md
            
          
    Latest Python2 and Python3 install CentOS6.5 except Pyenv

Install

Python2.6.6 is installed by default in CentOS 6.5. Since python2.6.6 is used in yum,
Install the latest python 2 and python 3 including pip, without breaking this environment. At this time, except pyenv.


When installing pip, curl: (35) SSL connect error error occurs, so upgrade libcurl to the latest version as follows.
And, in order to fix zipimport.ZipImportError: can not decompress data; zlib not available which occurs when installing pip as well, execute yum upgrade after installing the package.
    yum install libcurl

    sudo rpm -Uvh http://www.city-fan.org/ftp/contrib/yum-repo/city-fan.org-release-1-13.rhel6.noarch.rpm
    sudo vim /etc/yum.repos.d/city-fan.org.repo
    sudo yum update --enablerepo=city-fan.org libcurl

    yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel
    yum upgrade


Install python. Here we install Python 2.7.14 and Python 3.6.3. Python 3.7.0a1 is not recommended as it will cause installation errors.
    mkdir /usr/local/src
    cd /usr/local/src

    curl -O https://www.python.org/ftp/python/2.7.14/Python-2.7.14.tgz
    tar zxf Python-2.7.14.tgz

    cd Python-2.7.14

    ./configure
    make && make altinstall


Replace the default Python with the latest version without deleting Python2.6.6. At this time, do not influence yum.
    rm -rf /usr/bin/python2 /usr/bin/python2.6
    mv /usr/bin/python /usr/bin/python26

    vi /usr/bin/yum  ##python -> python26

    mv /usr/local/src/Python-2.7.14/python /usr/bin/python
    
    python --version
    # Python 2.7.14
    python26 --version
    # Python 2.6.6


Install pip.
    curl -kL https://bootstrap.pypa.io/get-pip.py | python
    pip -V
    # pip 9.0.1 from /usr/local/lib/python2.7/site-packages (python 2.7)