Pipenv is primarily meant to provide users and developers of applications with an easy method to setup a working environment.
It automatically creates and manages a virtualenv for your projects, as well as adds/removes packages from your Pipfile as you install/uninstall packages.
It also generates the ever-important Pipfile.lock, which is used to produce deterministic builds.
We install pipenv using pip:
pip install pipenv
This will spawn a new shell subprocess in a virtual environment to isolate the development.
Pipenv creates all your virtual environments in a default location. To know the location of virtual env run below command:
Importing from requirements.txt
If you already have a
requirements.txt file, running
pipenv install will automatically import the contents of the file and create a
You can also specify
pipenv install -r path/to/requirements.txt to import a requirements file.
Specify Python Version
To create a new virtualenv, using a specific version of Python you have installed, use
--python VERSION flag.
pipenv --python 3.7
If you don’t specify a Python version on the command–line, pipenv will default to the system installation.
Install Runtime Packages
To install a 3rd party package e.g. boto3 we use below command:
pipenv install boto3
This will create two new files
Pipfile.lock if they don’t exist.
|Pipfile.lock||Declares all dependencies, sub-dependencies, versions, current hashes for the downloaded files and ensures repeatable, deterministic builds|
To specify versions of a package:
pipenv install "boto3~=1.10"
|~=||Locks major version of the package and installs any minor updates. Equivalent to |
|>=||will install a version equal or larger than|
|<=||will install a version equal or lower than|
|==||Installs specific version and prevents minor updates|
|>||Installs version greater than|
Install Dev Packages
To install packages to be used only for development e.g. pytest use
pipenv install pytest --dev
Pipfile uses the TOML Spec.
You can also create the Pipfile yourself with the required package versions and install them using
pipenv install --dev command.
[[source]] name = "pypi" url = "https://pypi.org/simple" verify_ssl = true [dev-packages] boto3 = "*" pytest = "*" [packages] pyteams = "==0.1.1" [requires] python_version = "3.7"
[dev-packages] for development-only packages.
* tells pipenv to install any version.
[packages] for minimally required packages.
[requires] specifies target Python version
To uninstall a particular package:
pipenv uninstall boto3
To purge all the files from the virtual environment but to keep the Pipfile:
pipenv uninstall --all
To remove all the development packages from the virtual environment and to remove them from Pipfile:
pipenv uninstall --all-dev
Once you are done installing your packages, you can freeze your
Install from Pipfile.lock
In your production environment, you need to install the packages from your
Pipfile.lock file to re-create the same environment which you had when you ran
pipenv install --ignore-pipfile
--ignore-pipfile tells pipenv to ignore
Pipfile and install from
The lock file enables deterministic builds by taking a snapshot of all the versions of packages in an environment.
Install from Pipfile
If you already have a
Pipfile and want to install the packages in your local, run below command in your working directory:
To install both dev and regular packages use
pipenv install --dev
You can also show a dependency graph to understand your top-level dependencies and their sub-dependencies.
This command will print out a tree-like structure showing your dependencies.
Check for security vulnerabilities in your environment using below command:
Depending on the package you are trying to install, sometimes locking of pipfile hangs. In those cases, you can skip the lock file with
pipenv install --skip-lock pipenv install boto3 --skip-lock