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Author: Stephen Thompson

scikit-surgery-sphere-fitting is part of the SNAPPY software project, developed at the Wellcome EPSRC Centre for Interventional and Surgical Sciences, part of University College London (UCL).

scikit-surgery-sphere-fitting supports Python 3.6.

scikit-surgery-sphere-fitting fits a sphere to a set of 3D points. It includes a user interface that will read data from a vtk polydata file create an output polydata file showing the fitted sphere. Example usage:

python polydata_in.vtp --output polydatata_out.vtp --config conf.json

It was created in part to provide a simple demonstration of algorithm development as part of a program of SNAPPY Tutorials, but also provides a useful service should you want to fit a sphere to some data.



You can clone the repository using the following command:

git clone

Running tests

Pytest is used for running unit tests:

pip install pytest
python -m pytest


This code conforms to the PEP8 standard. Pylint can be used to analyse the code:

pip install pylint
pylint --rcfile=tests/pylintrc sksurgeryspherefitting


You can pip install directly from the repository as follows:

pip install git+

or directly from pypi

pip install scikit-surgery-sphere-fitting


Please see the contributing guidelines.