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Simple Python library to leverage the SCANOSS APIs

Project description

SCANOSS Python Package

The SCANOSS python package provides a simple easy to consume library for interacting with SCANOSS APIs/Engine.


To install (from, please run:

pip3 install scanoss

To upgrade an existing installation please run:

pip3 install --upgrade scanoss

Fast Winnowing

To take advantage of faster fingerprinting, please install the optional scanoss_winnowing package:

pip3 install scanoss_winnowing

Or directly using:

pip3 install scanoss[fast_winnowing]


Alternatively, there is a docker image of the compiled package. It can be found here. Details of how to run it can be found here.

Externally Managed Environments on Linux

If installing on Ubuntu 2023.04, Fedora 38, Debian 11, etc. a few additional steps are required before installing scanoss-py. More details can be found here.

The recommended method is to install pipx and use it to install scanoss-py:

sudo apt install pipx
pipx ensurepath

This will install the pipx package manager, which can then be used to install scanoss-py:

pipx install scanoss[fast_winnowing]

This will install the scanoss-py app in a separate virtual environment and create a link to the local path for execution.


The package can be run from the command line, or consumed from another Python script.

CLI Usage

The Python package manager (pip), will register the following command during installation:


It is also possible to launch it using:

python3 -m scanoss.cli

Running the bare command will list the available sub-commands:

> scanoss-py

usage: scanoss-py [-h] [--version]

SCANOSS Python CLI. Ver: 1.6.1, License: MIT, Fast Winnowing: True

  -h, --help            show this help message and exit
  --version, -v         Display version details

Sub Commands:
  valid subcommands

                        sub-command help
    version (ver)       SCANOSS version
    scan (sc)           Scan source code
    fingerprint (fp, wfp)
                        Fingerprint source code
    dependencies (dp, dep)
                        Scan source code for dependencies, but do not decorate them
    file_count (fc)     Search the source tree and produce a file type summary
    convert (cv, cnv, cvrt)
                        Convert file format
    component (comp)    Component support commands
    utils (ut)          General utility support commands

From there it is possible to scan a source code folder:

> scanoss-py scan -o scan-output.json <source-folder>

Scanning for Dependencies

The SCANOSS CLI supports dependency decoration. In order for this to work, it requires the installation of scancode:

pip install scancode-toolkit

Dependencies can then be decorated by adding the --dependencies option to the scanner:

> scanoss-py scan --dependencies -o scan-output.json <source-folder>

Package Usage

The scanoss package can also be used in other Python projects/scripts. A good example of how to consume it can be found here.

In general the easiest way to consume it is to import the required module as follows:

from scanoss.scanner import Scanner

def main():
    scanner = Scanner()
    scanner.scan_folder( '.' )
if __name__ == "__main__":

Scanning URL and API Key

By Default, scanoss uses the API URL endpoint for SCANOSS OSS KB: This API does not require an API key.

These values can be changed from the command line using:

> scanoss-py scan --apiurl <URL> --key <KEY>

From code, it would look like this:

from scanoss.scanner import Scanner

def main():
    scanner = Scanner(url='new-url', api_key='key')
    scanner.scan_folder( '.' )
if __name__ == "__main__":


Python 3.7 or higher.

Source code

The source for this package can be found here.


For client usage help please look here.


Details of each release can be found here.

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