python · January 17, 2023 0

How to Install Some Project from PyPI, VCS, and some other sources with python3 pip

Table of Content

Pip is recommended installer.You need to make sure you have pip available.You can test this by running:

python3 -m pip --version

Installing from PyPI

The most common usage of pip is to install from the Python Package Index.

To install the latest version of "Some Project" on your computer:

python3 -m pip install "SomeProject"

To install a specific version, install the following :

python3 -m pip install "SomeProject==1.4"

To install more than or equal to one version and less than another :

python3 -m pip install "SomeProject>=1,<2"

To install a version that is compatible with a certain version.In this case, this means to install any version of the “1.4.4” version that’s also “4.2”.

python3 -m pip install "SomeProject~=1.4.2"

Requirements files

Put a list of requirements in a requirements file.

python3 -m pip install -r requirements.txt

Installing from VCS

VCS will install a project from VCS in "editable".

python3 -m pip install -e git+https://git.repo/some_pkg.git#egg=SomeProject          # from git
python3 -m pip install -e hg+https://hg.repo/some_pkg#egg=SomeProject                # from mercurial
python3 -m pip install -e svn+svn://svn.repo/some_pkg/trunk/#egg=SomeProject         # from svn
python3 -m pip install -e git+https://git.repo/some_pkg.git@feature#egg=SomeProject  # from a branch

Installing from other Indexes

python3 -m pip install --index-url http://my.package.repo/simple/ SomeProject

In addition to PyPI , search an additional index during installation.

python3 -m pip install --extra-index-url http://my.package.repo/simple SomeProject

Installing from a local src tree

Installing from local src in Development Mode, i.e. in such a way that the project appears to be installed, but yet is still editable from the tree of origin.

python3 -m pip install -e <path>

You can install normally from src.

python3 -m pip install <path>

Installing from local archives

python3 -m pip install ./downloads/SomeProject-1.0.4.tar.gz
python3 -m pip install --no-index --find-links=file:///local/dir/ SomeProject
python3 -m pip install --no-index --find-links=/local/dir/ SomeProject
python3 -m pip install --no-index --find-links=relative/dir/ SomeProject

Installing from other sources

To install from other data sources (for example Amazon S3 storage) you can create a helper application that presents the data in a PEP 503 compliant index format.

./s3helper --port=7777
python -m pip install --extra-index-url http://localhost:7777 SomeProject

Installing “Extras”

Extras are optional “variants” of a package. They may include additional dependencies. They enable additional functionality from the package.If you wish to install an extra for a package which you know publishes one:

python3 -m pip install SomePackage[PDF]
python3 -m pip install SomePackage[PDF]==3.0
python3 -m pip install -e .[PDF]  # editable project in current directory
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