The pip package should already be installed on the remote server.
Virtualenv package should be installed on the remote server already if you need to manage the packages in the python virtual environment.

NOTE: If you get the error “unable to find any of pip2, pip to use. Pip needs to be installed”. The pip module is not available on the remote server during the execution.

Installing a Pip Module

To install a new python library, you need to set the name of the package against the “name” parameter. By default, the “state” parameter is “present”, the module will try to install the library.

If the library is already installed, then nothing will be done. And if a new version of the library exists, it will not be upgraded.

- hosts: all
  tasks:
- name: Installing NumPy python library using pip module
    pip:
name: NumPy

Installing Using a Requirement File

Another way to install the libraries is via the requirements file. If you have any requirements file with all the libraries in the remote servers, give it as input to the “requirements” parameters.

Also, you can use the copy module beforehand to copy the requirements file to every remote server. In the following code, install the requirements file in the location/tmp/req.txt.

- hosts: all
  tasks:
- name: Installing python libraries using requirements file
    pip:
requirements: req.txt
      chdir: /tmp
req.txt
-------
nltk==3.0.0
numpy<0.0scipy>=1.0.0

Installing Multiple Python Libraries

To install the multiple packages, set all the libraries against the “name” parameter, separated by a comma.

- hosts: all
  tasks:
- name: Installing multiple python packages
    pip:
name: NumPy,SciPy

Installing a Particular Version of Pip Library

There is a “version” parameter, which can be used to install only the mentioned version of a library. In the following code, install the version of nltk library.

- hosts: all
  tasks:
- name: Installing a required version of python library
    pip:
name: nltk
      version: '3.0.0'

Reinstall a Python Library

You can reinstall the python library by using the “forcereinstall” value for the “state” parameter.

This will reinstall the latest version of the library. You can use the “version” parameter along with it. The following code will install the version 3.0.0 of the nltk library.

– hosts: all

tasks:

– name: Reinstalling a python library

pip:

name: nltk

version: 3.0.0

state: forcereinstall

Removing a Python Library

You can delete a python library by changing the state to “absent”. In the following code, we will remove the “NumPy” and “SciPy” python libraries from the remote servers.

- hosts: all
  tasks:
- name: Removing Python libraries
    pip:
name: NumPy,SciPy
      state: absent

So, this brings us to the end of blog. This Tecklearn ‘Deep dive into Pip module in Ansible’ blog helps you with commonly asked questions if you are looking out for a job in DevOps. If you wish to learn Ansible and build a career in DevOps domain, then check out our interactive, Configuration Management using Ansible Training, that comes with 24*7 support to guide you throughout your learning period. Please find the link for course details:

https://www.tecklearn.com/course/configuration-management-using-ansible/

Configuration Management using Ansible Training

About the Course

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What you will Learn in this Course?

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Software Development Life Cycle
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DevOps Tools
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Configuration Management using Ansible

What is Ansible?
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Ansible Installation
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Got a question for us? Please mention it in the comments section and we will get back to you.

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