Install multiple python packages at once using pip

October 17, 2021 / Python / By

This article will discuss two different ways to install multiple python packages in a single command using pip. These two ways are,

  • Using the raw pip install command.
  • Using requirements.txt with the pip install command

Let’s discuss them one by one,

Install multiple python packages in a single pip install command

We can pass the space-delimited list of package names to the pip install command. For example,

pip install pandas numpy flask pytz

It will install three packages i.e.

  • pandas
  • numpy
  • flask
  • pytz

To confirm that all the given packages have been installed or not, we can run this command to check all the installed packages i.e.

pip freeze

Output:

click==8.0.3
Flask==2.0.2
itsdangerous==2.0.1
Jinja2==3.0.2
MarkupSafe==2.0.1
numpy==1.21.2
pandas==1.3.3
python-dateutil==2.8.2
pytz==2021.3
six==1.16.0
Werkzeug==2.0.2

To install specific versions of multiple python packages in a single command, you can specify the version number along with package names in space separated list. For example,

Frequently Asked:

pip install pandas==1.3.2 numpy==1.21.2 Flask==2.0.2

It will install all the specified versions of all the given python packages.

Install multiple python packages at once using requirements.txt

If you have an extensive list of packages to install, it is better to put them in a file named reqiurements.txt and install them in a single pip command. But command will be relatively shorter in this case. Let’s understand by an example,

Suppose you want to install four python packages, i.e., pandas, numpy, pytz, and flask. Then create requirements.txt with is content i.e.

Flask==2.0.2
numpy==1.21.2
pandas==1.3.2
pytz==2021.3

We have specified the version of packages too. The version number is optional, and if not provided, it will install the latest version of the package by default.

Now run the pip install command to install all the packages in requirements.txt i.e.

pip install -r requirements.txt

It will install all the packages specified in the requirements.txt

Summary

We learned two different ways to install multiple python packages in a single command.

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