added pool destructor, addressing #57

CHANGELOG.md

@@ -5,6 +5,11 @@ All notable changes to nautilus will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Fixed
+- Added an explicit destructor for pool objects to prevent rare freezes.
+
 ## [1.0.5] - 2023-10-18
 
 ### Added

nautilus/pool.py

@@ -56,6 +56,7 @@ def __init__(self, pool, likelihood=None):
             workers.
 
         """
+        print("iniating...")
         if isinstance(pool, int):
             self.pool = Pool(pool, initializer=initialize_worker,
                              initargs=(likelihood, ))
@@ -106,3 +107,12 @@ def size(self):
             if hasattr(self.pool, attr):
                 return getattr(self.pool, attr)
         raise ValueError('Cannot determine size of pool.')
+
+    def __del__(self):
+        """
+        Close the pool.
+
+        """
+        for attr in ['close', 'shutdown']:
+            if hasattr(self.pool, attr):
+                getattr(self.pool, attr)()