Log a warning for the user about changed dimensionality

Author: jorenretel

bigwig_loader/__init__.py

@@ -1,5 +1,4 @@
-__author__ = ["Joren Retel"]
-__email__ = ["joren.retel@pfizer.com"]
+import logging
 
 try:
     from bigwig_loader._version import version as __version__
@@ -11,4 +10,21 @@
 
 from bigwig_loader.settings import Settings as _Settings
 
+__author__ = ["Joren Retel"]
+__email__ = ["joren.retel@pfizer.com"]
+
+logger = logging.getLogger("bigwig_loader")
+if not logger.hasHandlers():
+    handler = logging.StreamHandler()
+    formatter = logging.Formatter("[%(levelname)s] %(name)s: %(message)s")
+    handler.setFormatter(formatter)
+    logger.addHandler(handler)
+logger.setLevel(logging.WARNING)
+
+
+logger.warning(
+    "Since bigwig-loader v0.3.0 the order of the output "
+    "has changed to (batch x sequence x tracks)"
+)
+
 config = _Settings()