From 9de5eb278d4bb7834c1abf15ddefdf4c85b29465 Mon Sep 17 00:00:00 2001
From: Paul Sokolovsky <pfalcon@users.sourceforge.net>
Date: Fri, 10 Jun 2016 23:06:56 +0300
Subject: [PATCH] docs/sys: Detailed description of print_exception() diff from
 traceback module.

---
 docs/library/sys.rst | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/docs/library/sys.rst b/docs/library/sys.rst
index b5a9138c0..ebde2b191 100644
--- a/docs/library/sys.rst
+++ b/docs/library/sys.rst
@@ -21,7 +21,12 @@ Functions
    .. admonition:: Difference to CPython
       :class: attention
 
-      This function appears in the ``traceback`` module in CPython.
+      This is simplified version of a function which appears in the
+      ``traceback`` module in CPython. Unlike ``traceback.print_exception()``,
+      this function takes just exception value instead of exception type,
+      exception value, and traceback object; `file` argument should be
+      positional; further arguments are not support. Compliant
+      ``traceback`` module can be found in micropython-lib.
 
 Constants
 ---------
-- 
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