How to install pip on CentOS 7

To install pip on CentOS 7

pip is a package management tool for used to install and manage Python packages. Python is an open-source, multi-platform and popular programming language with a design philosophy which emphasizes more on code readability. Since it has more focus on readability, it is considered to be an easy programming language.

Pre-Flight Check

• These instructions are intended specifically for installing Pip, a tool for installing and managing Python packages.
• I’ ll be working from a Liquid Web Core Managed CentOS 7 server, and I’ ll be logged in as root.

Installing pip

There are two options for installing pip. Use either Option #1 or Option #2 below.

Option #1: Install pip with Curl and Python
We can use curl and python to download and install pip

[root@linuxhelp1 ~]# curl " https://bootstrap.pypa.io/get-pip.py"  -o " get-pip.py" 
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 1558k  100 1558k    0     0   420k      0  0:00:03  0:00:03 --:--:--  420k

Now install pip by using the following command.

[root@linuxhelp1 ~]# python get-pip.py 
Collecting pip
/tmp/tmpDRoinP/pip.zip/pip/_vendor/requests/packages/urllib3/util/ssl_.py:318: SNIMissingWarning: An HTTPS request has been made, but the SNI (Subject Name Indication) extension to TLS is not available on this platform. This may cause the server to present an incorrect TLS certificate, which can cause validation failures. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/security.html#snimissingwarning.
/tmp/tmpDRoinP/pip.zip/pip/_vendor/requests/packages/urllib3/util/ssl_.py:122: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/security.html#insecureplatformwarning.
  Downloading pip-9.0.1-py2.py3-none-any.whl (1.3MB)
    100% |????????????????????????????????| 1.3MB 226kB/s 
Collecting wheel
  Downloading wheel-0.29.0-py2.py3-none-any.whl (66kB)
    100% |????????????????????????????????| 71kB 532kB/s 
Installing collected packages: pip, wheel
Successfully installed pip-9.0.1 wheel-0.29.0
/tmp/tmpDRoinP/pip.zip/pip/_vendor/requests/packages/urllib3/util/ssl_.py:122: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest/security.html#insecureplatformwarning.

Verify The Installation
View a list of helpful commands by making use of --help

[root@linuxhelp1 ~]# pip --help
Usage:   
  pip < command>  [options]

Commands: 
  install                     Install packages.
  download                    Download packages.
  uninstall                   Uninstall packages.
  freeze                      Output installed packages in requirements format.
  list                        List installed packages.
  show                        Show information about installed packages.
  check                       Verify installed packages have compatible dependencies.
  search                      Search PyPI for packages.
  wheel                       Build wheels from your requirements.
  hash                        Compute hashes of package archives.
  completion                  A helper command used for command completion.
  help                        Show help for commands.

General Options:
  -h, --help                  Show help.
  --isolated                  Run pip in an isolated mode, ignoring environment variables and user
                              configuration.
  -v, --verbose               Give more output. Option is additive, and can be used up to 3 times.
  -V, --version               Show version and exit.
  -q, --quiet                 Give less output. Option is additive, and can be used up to 3 times
                              (corresponding to WARNING, ERROR, and CRITICAL logging levels).
  --log < path>                 Path to a verbose appending log.
  --proxy < proxy>              Specify a proxy in the form [user:passwd@]proxy.server:port.
  --retries < retries>          Maximum number of retries each connection should attempt (default 5
                              times).
  --timeout < sec>              Set the socket timeout (default 15 seconds).
  --exists-action < action>     Default action when a path already exists: (s)witch, (i)gnore,
                              (w)ipe, (b)ackup, (a)bort.
  --trusted-host < hostname>    Mark this host as trusted, even though it does not have valid or any
                              HTTPS.
  --cert < path>                Path to alternate CA bundle.
.
.

Check the version of pip that is installed by running the following command.

[root@linuxhelp1 ~]# pip -V
pip 9.0.1 from /usr/lib/python2.7/site-packages (python 2.7)

Option #2: Install Pip with Yum
Add the EPEL Repository through the following command.

[root@linuxhelp1 ~]# rpm -iUvh https://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-8.noarch.rpm
Retrieving https://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-8.noarch.rpm
warning: /var/tmp/rpm-tmp.gYs7ep: Header V3 RSA/SHA256 Signature, key ID 352c64e5: NOKEY
Preparing...                          ################################# [100%]
Updating / installing...
   1:epel-release-7-8                 ################################# [100%]

Then let’ s install python-pip and any required packages.

[root@linuxhelp1 ~]# yum -y install python-pip
Loaded plugins: fastestmirror, langpacks
base                                                                          | 3.6 kB  00:00:00     
epel/x86_64/metalink                                                          | 7.1 kB  00:00:00     
epel                                                                          | 4.3 kB  00:00:00     
http://epel.mirror.net.in/epel/7/x86_64/repodata/repomd.xml: [Errno -1] repomd.xml does not match metalink for epel
Trying other mirror.
epel                                                                          | 4.3 kB  00:00:00     
extras                                                                        | 3.4 kB  00:00:00     
updates                                                                       | 3.4 kB  00:00:00     
(1/4): epel/x86_64/group_gz                                                   | 170 kB  00:00:01     
(2/4): epel/x86_64/updateinfo                                                 | 696 kB  00:00:06     
(3/4): updates/7/x86_64/primary_db                                            | 1.2 MB  00:00:15     
(4/4): epel/x86_64/primary_db                                                 | 4.4 MB  00:00:33     
Determining fastest mirrors
.
.
Installed:
  python2-pip.noarch 0:8.1.2-5.el7                                                                   

Complete!

You can check the version of PHP by using -V option.

[root@linuxhelp1 ~]# pip -V
pip 8.1.2 from /usr/lib/python2.7/site-packages (python 2.7)