Fix issue #214

CHANGELOG.md

@@ -7,6 +7,7 @@ Changelog
 * Please add an item to this CHANGELOG for any new features or bug fixes when creating a PR.
 * Increase the default `cutoff` from 7.5 Å to 9 Å, matching common practice and giving faster PME on current GPUs, since the shorter cutoff shifts too much work onto the reciprocal space grid [#209](https://github.com/OpenBioSim/somd2/pull/209).
 * Buffer energy components and write them at checkpoint time, rather than rewriting the parquet file on every energy save, which cost a few milliseconds per replica per cycle and grew with the length of the run [#212](https://github.com/OpenBioSim/somd2/pull/212).
+* Silence Sire's progress bars when a runner is constructed rather than when `somd2` is imported, so that importing `somd2` as a library no longer changes how Sire reports progress [#215](https://github.com/OpenBioSim/somd2/pull/215).
 
 [2026.2.0](https://github.com/openbiosim/somd2/compare/2026.1.0...2026.2.0) - Sep 2026
 --------------------------------------------------------------------------------------

src/somd2/__init__.py

@@ -19,14 +19,6 @@
 # along with SOMD2. If not, see <http://www.gnu.org/licenses/>.
 #####################################################################
 
-# Disable Sire progress bars until we work out the best way to handle
-# them for the SOMD2 runner, i.e. when running multiple dynamics objects
-# in parallel.
-from sire.base import ProgressBar as _ProgressBar
-
-_ProgressBar.set_silent()
-del _ProgressBar
-
 from loguru import logger as _logger
 
 from . import runner

src/somd2/runner/_base.py

@@ -85,6 +85,11 @@ def __init__(self, system, config):
         # user's final choice of output directory is known.
         self._config._setup_output_directory()
 
+        # Progress is reported through the logger, so silence Sire's progress
+        # bars. This also lets Sire run dynamics in longer blocks, since the
+        # blocks only exist to update the bar.
+        _sr.base.ProgressBar.set_silent()
+
         if self._config.replica_exchange and self._config.perturbed_system is not None:
             # Make sure the number of positions is correct.
             num_atoms = self._system.num_atoms()