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posted on 2020-08-22, 23:13 authored by Jackson BurnsJackson Burns


Simple thin client to interface python scripts with SambVca catalytic pocket Fortran calculator.


py2sambvca is available on PyPi and can be installed like so:

pip install py2sambvca

py2sambvca has zero external depdencies.


After installation, py2sambvca can be added to a Python script via import and instantiated:

from py2sambvca import p2s

nhc_p2s = p2s(

From here, running can be done stepwise or with a single function:
# equivalent to

All values for the total complex, quadrants, and octants are available through getters:

Total Values:

  • get_free_volume()
  • get_buried_volume()
  • get_exact_volume()
  • get_total_volume()
  • get_percent_buried_volume()
  • get_percent_free_volume()
  • get_percent_total_volume()

Quadrant Values:

  • get_quadrant_free_volume()
  • get_quadrant_buried_volume()
  • get_quadrant_total_volume()
  • get_quadrant_percent_buried_volume()
  • get_quadrant_percent_free_volume()

Octant Values:

  • get_octant_free_volume()
  • get_octant_buried_volume()
  • get_octant_total_volume()
  • get_octant_percent_buried_volume()
  • get_octant_percent_free_volume()

Results can also be accessed through a general getter method: get(), get_quadrant_result(), and get_octant_result().

All results can also be directly accessed through dictionaries, returned from a call to run() or parse_output() and availabel through p2s.total_results, p2s.quadrant_results, and p2s.octant_results.

In case there is something else you are looking for, you can use a general purpose get_regex() function to return the line containing a pattern.


Here are a couple repositories using py2sambvca as a Python package or extending its source code, check them out:


py2sambvca is available under the GNU GPLv3 in accordance with the base Fortran code which is available under the same license and can be retreieved here:

The original fortran program (sambvca21.f) is also included in the test directory for testing purposes. It is still under the same terms of the GNU license:

  • This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation.
  • This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
  • The results obtained from using the source code shall be used for scientific purposes only, excluding industrial or commercial purposes. To use the SambVca suite for industrial or commercial purposes, contact lcavallo|@|
  • Proper acknowledgement shall be made to the author of the source code in publications resulting from the use of it in its original form or modified.
  • The results from using the source code are provided "AS IS" without warranty of any kind.


Please cite the SambVca base fortran tool as: Falivene, L. et al. Nat. Chem. 2019, DOI:10.1038/s41557-019-0319-5

py2sambvca has been uploaded to Figshare and may be cited as: Burns, J. figshare. 2020, DOI:10.6084/m9.figshare.12846707.v2