With NetworKit as a Python extension module, you get access to native high-performance code and can at the same time work interactively in the Python ecosystem. Although the standard Python interpreter works fine, we recommend IPython as a great environment for scientific workflows. View the IPython Quickstart Guide for installation instructions and how to use NetworKit with IPython.
Once you have installed NetworKit, please make sure to check out our NetworKit UserGuide for an overview of the features provided in NetworKit.
You will need the following software to install NetworKit as a python package:
OpenMP for parallelism (usually ships with the compiler)
Python3 (3.5 or higher is supported)
Development libraries for Python3. The package name depends on your distribution. Examples:
apt-get install python3-dev
dnf install python3-devel
CMake version 3.5 or higher (e.g.,
pip3 install cmake)
Cython version 0.29 or higher (e.g.,
pip3 install cython)
There are several ways to install NetworKit. Besides using
pip3 (the common Python module way), it is also possible to get it via package manager channels like
brew. The complete list of possibilities is available on Github .
The following example uses
pip3 for installation on a recent Debian/Ubuntu-based distribution. Asume you have a clean minimal system, you will first have to install all requirements:
# On Ubuntu or equivalent, python3 is pre-installed. # Install compilation tools (includes compiler, OpenMP) sudo apt install build-essential # Install Python3, pip3 sudo apt install python3-dev python3-pip # Install cmake, cython pip3 install cmake cython # And finally ... install NetworKit pip3 install networkit
For macOS you can follow similar steps as shown for
pip3 under Linux. However we recommend using
brew for managing NetworKit installations.
Apart from the compilation environment all other dependencies are handled the brew formula.
# Install xcode command line tools xcode-select --install # Install Homebrew (if needed) ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" # Install NetworKit via brew brew install python3
With the release of NetworKit 9.0 we have an experimental support for Windows installations. While installation is also possible via
pip, requirements include the official Python package and at least the free Community-Edition of Visual Studio.
You also have to make sure that MSVC-compiler (
cl.exe) can be found during installation. One possible way to achieve this is to call
pip from within the “Native Tools Command Prompt” provided by Visual Studio.
# Requirements: Official Python release is installed and cl.exe can be found. # If "Native Tools Command Prompt" is used, cmake and ninja are already installed. # Install cython pip3 install cython # And finally ... install NetworKit pip3 install networkit
For Windows 10, it is also possible to use the Windows Subsystem for Linux See the official documentation on how to activate the Linux Subsystem.
The Linux Subsystem is fully compatible with NetworKit. After a successful installation, simply open a new command line and start a new bash shell. From there you can follow the instructions for Linux.
For further information, we refer to the README file of our GitHub repository, which contains instructions for building NetworKit from source.
First make sure you have installed IPython, e.g. via pip:
pip3 install ipython.
If you want to use NetworKit in the IPython terminal, type the following commands in your OS terminal:
from networkit import *
The first line opens the IPython terminal. The second line imports the networkit Python module. After that, you should be able to use NetworKit interactively. For usage examples, refer to the NetworKit UserGuide.
Additionally, we recommend that you familiarize yourself with NetworKit through experimenting with the interactive IPython Notebook NetworKit_UserGuide.ipynb located in the folder Doc/Notebooks. The user guide also introduces a large portion of NetworKits functionality with usage examples. To display and work with these notebooks, you have to install jupyter and start a local notebook server from the terminal with:
If you run into any problems with jupyter, head over to the jupyter documentation. If the notebook server starts as it is supposed to, your default browser should open a web interface or you have to open it manually. Then you can add NetworKit_UserGuide.ipynb from the above mentioned location or browse to the location through the web interface.
To show plots within the notebooks, place the following two lines at the beginning of your notebook:
%matplotlib inline import matplotlib.pyplot as plt
Note: Instead of running jupyter, it may still be possible to run
ipython3 notebook. However, the notebook functionality of the ipython package is deprecated and has been moved to jupyter, which we strongly recommend.
Now that you are done installing NetworKit, you might want to try the following example:
>>> from networkit import * >>> g = generators.HyperbolicGenerator(1e5).generate() >>> overview(g) Network Properties for: G#5 nodes, edges 100000, 300036 directed? False weighted? False isolated nodes 1815 self-loops 0 density 0.000060 clustering coefficient 0.720003 min/max/avg degree 0, 1174, 6.000720 degree assortativity 0.001383 number of connected components 4026 size of largest component 78387 (78.39 %) >>> communities = community.detectCommunities(g, inspect=True) PLM(balanced,pc,turbo) detected communities in 0.14902853965759277 [s] solution properties: ------------------- ----------- # communities 4253 min community size 1 max community size 1821 avg. community size 23.5128 modularity 0.987991 ------------------- ----------- >>>
Mac OS X 10.10 “Yosemite”: Some users have reported compilation problems on Yosemite with g++ 4.9. The compiler errors mention register problems.
While the exact reason remains unclear, the actual issue seems to be that the compiler tries to perform a dual architecture build.
Fix: Enforce a 64-bit build by prepending
ARCHFLAGS="-arch x86_64" to your setup/pip command, e.g. as in
sudo ARCHFLAGS="-arch x86_64" python3 setup.py build_ext --inplace -j4 or
sudo ARCHFLAGS="-arch x86_64" pip3 install networkit.
NetworKit has not yet been successfully built on Windows 8 and below in a reproducible way. This is partially due to the fact that Windows ships without a C++ compiler which is necessary to build the Python extensions. Even with the Visual C++ Redistributable our attempts were not successful. Any help is appreciated. It may be possible to build NetworKit as a library on Windows in environments like MinGW or Cygwin.
Some algorithms (e.g. StronglyConnectedComponents) are implemented in a recursive manner and for large input may exceed the default stack size on your platform.
To work around this issue, you can lift the stack size limit for your terminal process and subsequent child processes with
ulimit -s unlimited or
ulimit -Hs (to the hard limit if there is one). It is also possible to change resource limits from Python directly with
import resource; resource.setrlimit(resource.RLIMIT_STACK, (-1, -1)).
On macOS, it can happen that the g++ compiler is unable to locate specific Linux-based header files. An example would be an error during the compilation of a C++ header which includes
stdint. This can generate the following error message:
fatal error: sys/_types/_int8_t.h: No such file or directory. This error will most likely happen on new systems or after a major system upgrade. In this case you need to (again) install the Xcode command line tools:
xcode-select --install. Afterwards the code should compile completely.