Installation¶
Pegasus works with Python 3.7, 3.8 and 3.9.
Linux¶
Ubuntu/Debian¶
Prerequisites¶
On Ubuntu/Debian Linux, first install the following dependency by:
sudo apt install build-essential
Next, you can install Pegasus system-wide by PyPI (see Ubuntu/Debian install via PyPI), or within a Miniconda environment (see Install via Conda).
To use the Force-directed-layout (FLE) embedding feature, you’ll need Java. You can either install Oracle JDK, or install OpenJDK which is included in Ubuntu official repository:
sudo apt install default-jdk
Ubuntu/Debian install via PyPI¶
First, install Python 3 and pip tool for Python 3:
sudo apt install python3 python3-pip
python3 -m pip install --upgrade pip
Now install Pegasus via pip:
python3 -m pip install pegasuspy
There are optional packages that you can install:
mkl: This package improves math routines for science and engineering applications:
python3 -m pip install mkl
fitsne: This package is to calculate t-SNE plots using a fast algorithm FIt-SNE:
sudo apt install libfftw3-dev python3 -m pip install fitsne
leiden: This package provides Leiden clustering algorithm, besides the default Louvain algorithm in Pegasus:
python3 -m pip install leidenalg
Note
If installing from Python 3.9, you’ll need to install the following packages system-wide first in order to locally compile louvain
package, one of Pegasus’ dependencies:
sudo apt install flex bison libtool
Fedora¶
Prerequisites¶
On Fedora Linux, first install the following dependency by:
sudo dnf install gcc gcc-c++
Next, you can install Pegasus system-wide by PyPI (see Fedora install via PyPI), or within a Miniconda environment (see Install via Conda).
To use the Force-directed-layout (FLE) embedding feature, you’ll need Java. You can either install Oracle JDK, or install OpenJDK which is included in Fedora official repository (e.g. java-latest-openjdk
):
sudo dnf install java-latest-openjdk
or other OpenJDK version chosen from the searching result of command:
dnf search openjdk
Fedora install via PyPI¶
Fedora 33+ has set Python 3.9 as the default Python 3 version. However, Pegasus has not supported it yet. So we’ll use Python 3.8 in this tutorial.
First, install Python 3 and pip tool for Python 3:
sudo dnf install python3.8
python3.8 -m ensurepip --user
python3.8 -m pip install --upgrade pip
Now install Pegasus via pip:
python3.8 -m pip install pegasuspy
There are optional packages that you can install:
mkl: This package improves math routines for science and engineering applications:
python3.8 -m pip install mkl
fitsne: This package is to calculate t-SNE plots using a faster algorithm FIt-SNE:
sudo dnf install fftw-devel python3.8 -m pip install fitsne
leiden: This package provides Leiden clustering algorithm, besides the default Louvain algorithm in Pegasus:
python3.8 -m pip install leidenalg
Note
If installing from Python 3.9, you’ll need to install the following packages system-wide first in order to locally compile louvain
package, one of Pegasus’ dependencies:
sudo dnf install flex bison libtool
macOS¶
Prerequisites¶
First, install Homebrew by following the instruction on its website: https://brew.sh/. Then install the following dependencies:
brew install libomp
And install macOS command line tools:
xcode-select --install
Next, you can install Pegasus system-wide by PyPI (see macOS installation via PyPI), or within a Miniconda environment (see Install via Conda).
To use the Force-directed-layout (FLE) embedding feature, you’ll need Java. You can either install Oracle JDK, or install OpenJDK via Homebrew:
brew install java
macOS install via PyPI¶
You need to install Python and pip tool first:
brew install python3 python3 -m pip install --upgrade pip
Now install Pegasus:
python3 -m pip install pegasuspy
There are optional packages that you can install:
mkl: This package improves math routines for science and engineering applications:
python3 -m pip install mkl
fitsne: This package is to calculate t-SNE plots using a faster algorithm FIt-SNE. First, you need to install its dependency fftw:
brew install fftw
Then install fitsne by:
python3 -m pip install fitsne
leiden: This package provides Leiden clustering algorithm, besides the default Louvain algorithm in Pegasus:
python3 -m pip install leidenalg
Install via Conda¶
Alternatively, you can install Pegasus via Conda, which is a separate virtual environment without touching your system-wide packages and settings.
You can install Anaconda, or Miniconda (a minimal installer of conda). In this tutorial, we’ll use Miniconda.
Download Miniconda installer for your OS. For example, if on 64-bit Linux, then use the following commands to install Miniconda:
export $CONDA_PATH=/home/foo bash Miniconda3-latest-Linux-x86_64.sh -p $CONDA_PATH/miniconda3 mv Miniconda3-latest-Linux-x86_64.sh $CONDA_PATH/miniconda3 source ~/.bashrc
where /home/foo
should be replaced by the directory to which you want to install Miniconda. Similarly for macOS.
Create a conda environment for pegasus. This tutorial uses
pegasus
as the environment name, but you are free to choose your own:conda create -n pegasus -y python=3.8
Also notice that Python 3.8
is used in this tutorial. To choose a different version of Python, simply change the version number in the command above. Since Pegasus conda package only support Python 3.7 and 3.8 for now, you should choose your Python version from either of these two.
Enter
pegasus
environment by activating:conda activate pegasus
Install the following dependency:
conda install -y -c conda-forge louvain
Install Pegasus:
pip install pegasuspy
(Optional) If you want to use the FIt-SNE plot functionality in Pegasus, do the following:
conda install -y -c conda-forge fftw pip install fitsne
And use the following command to enable the Leiden clustering functionality:
pip install leidenalg
Install via Singularity¶
Singularity is a container engine similar to Docker. Its main difference from Docker is that Singularity can be used with unprivileged permissions.
Note
Please notice that Singularity Hub has been offline since April 26th, 2021 (see blog post). All existing containers held there are in archive, and we can no longer push new builds.
So if you fetch the container from Singularity Hub using the following command:
singularity pull shub://klarman-cell-observatory/pegasus
it will just give you a Singularity container of Pegasus v1.2.0 running on Ubuntu Linux 20.04 base with Python 3.8, in the name pegasus_latest.sif
of about 2.4 GB.
On your local machine, first install Singularity, then you can use our Singularity spec file to build a Singularity container by yourself.
Say the built container file has name pegasus.sif
. Now you can interact with it, e.g.:
singularity run pegasus.sif
Please refer to Singularity image interaction guide for details.
Development Version¶
To install Pegasus development version directly from its GitHub respository, please do the following steps:
Install prerequisite libraries as mentioned in above sections.
Install Git. See here for how to install Git.
Use git to fetch repository source code, and install from it:
git clone https://github.com/klarman-cell-observatory/pegasus.git cd pegasus pip install -e .
where -e
option of pip
means to install in editing mode, so that your Pegasus installation will be automatically updated upon modifications in source code.