Install and manage packages in python

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install_and_manage_python_packages

Skill - Install and manage python packages

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Skills Required

Please make sure to have all the skills mentioned above to understand and execute the code mentioned below. Go through the above skills if necessary for reference or revision

In this post we will learn how to use the pip command to manage python packages

Install a python package

  • Open command prompt
  • Use command pip install <package_name>
  • For example, to install a package named pandas, you need to run
    pip install pandas

Install specific version of a python package

  • Open command prompt
  • Use command pip install <package_name>==<version_number>
  • For example, to install a package named numpy with version 1.11.1, you need to run
    pip install numpy==1.11.1

list all the packages in a python environment

  • Open command prompt
  • Use command pip list
  • All the installed python packages along with their version numbers will be displayed

install packages from a file using ‘-r’ flag

  • If we have a text file named requirements.txt with packages information as shown below
MySQL-python==1.2.3
WebOb==1.2.3
numpy==1.11.1
  • We can install all the packages from the file like the one file shown above using the following command
    pip install -r requirements.txt
  • To install packages from a file located at a specific path, use a command something like the one below
    pip install -r C:\Users\Nagasudhir\Documents\requirements.txt

dump all the packages information into a text file

  • In order to dump the installed packages information of the current python environment use the following command
    pip freeze > requirements.txt

Further Reading

Video

The video for this post can be seen here

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