Handle conflicting lib name prefix blosc/blosc2

src/hdf5plugin/__init__.py

@@ -557,10 +557,19 @@ def _init_filters():
                 continue
 
         # Load DLL
-        filename = _glob(_os.path.join(
+        filenames = _glob(_os.path.join(
             PLUGIN_PATH, 'libh5' + name + '*' + config.filter_file_extension))
-        if len(filename):
-            filename = filename[0]
+        if len(filenames):
+            if name == 'blosc':  # Handle name prefix conflict with blosc2
+                for filename in filenames:
+                    if not _os.path.basename(filename).startswith('libh5blosc2'):
+                        break  # That the blosc(1) filename
+                else:
+                    _logger.error("Cannot initialize filter %s: File not found", name)
+                    continue
+            else:
+                filename = filenames[0]
+
         else:
             _logger.error("Cannot initialize filter %s: File not found", name)
             continue