--- a
+++ b/mmaction/version.py
@@ -0,0 +1,18 @@
+# Copyright (c) Open-MMLab. All rights reserved.
+
+__version__ = '0.21.0'
+
+
+def parse_version_info(version_str):
+    version_info = []
+    for x in version_str.split('.'):
+        if x.isdigit():
+            version_info.append(int(x))
+        elif x.find('rc') != -1:
+            patch_version = x.split('rc')
+            version_info.append(int(patch_version[0]))
+            version_info.append(f'rc{patch_version[1]}')
+    return tuple(version_info)
+
+
+version_info = parse_version_info(__version__)