Less cahching warnings and closes #111

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/) (+ the Migration Guide),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.33.1] - 2024-06-14
+
+- Only warning about global caching once.
+
 ## [0.33.0] - 2024-05-23
 
 ### Added

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "tpcp"
-version = "0.33.0"
+version = "0.33.1"
 description = "Pipeline and Dataset helpers for complex algorithm evaluation."
 authors = [
     "Arne Küderle <[email protected]>",

tpcp/__init__.py

@@ -23,7 +23,7 @@
 )
 from tpcp._pipeline import OptimizablePipeline, Pipeline
 
-__version__ = "0.33.0"
+__version__ = "0.33.1"
 
 
 __all__ = [

tpcp/caching.py

@@ -11,16 +11,21 @@
 from tpcp import Algorithm, get_action_methods_names, get_results, make_action_safe
 from tpcp._hash import custom_hash
 
+_ALREADY_WARNED = False
+
 
 def _global_cache_warning():
-    if multiprocessing.parent_process() is None:
+    global _ALREADY_WARNED  # noqa: PLW0603
+
+    if multiprocessing.parent_process() is None and not _ALREADY_WARNED:
         # We want to avoid spamming the user with warnings if they are running multiple processes
         warnings.warn(
             "Global caching is a little tricky to get right and our implementation is not yet battle-tested. "
             "Please double check that the results are correct and report any issues you find.",
             UserWarning,
-            stacklevel=2,
+            stacklevel=3,
         )
+        _ALREADY_WARNED = True
 
 
 _instance_level_disk_cache_key = "__tpcp_disk_cached_action_method"