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-rw-r--r--docs/library/sys.rst6
1 files changed, 6 insertions, 0 deletions
diff --git a/docs/library/sys.rst b/docs/library/sys.rst
index aee2e54ee..d3cc308d8 100644
--- a/docs/library/sys.rst
+++ b/docs/library/sys.rst
@@ -134,3 +134,9 @@ Constants
.. data:: version_info
Python language version that this implementation conforms to, as a tuple of ints.
+
+ .. admonition:: Difference to CPython
+ :class: attention
+
+ Only the first three version numbers (major, minor, micro) are supported and
+ they can be referenced only by index, not by name.