commit 5affd23e6f42125998724787025080a24839266e
author Serhiy Storchaka <storchaka@gmail.com> Wed Apr 05 09:37:24 2017 +0300
committer GitHub <noreply@github.com> Wed Apr 05 09:37:24 2017 +0300
tree 8b7ca82362e78a32805b117d574082d512251d3c
parent 43ba8861e0ad044efafa46a7cc04e12ac5df640e

bpo-29762: More use "raise from None". (#569)

This hides unwanted implementation details from tracebacks.

Lib/xml/etree/ElementPath.py

diff --git a/Lib/xml/etree/ElementPath.py b/Lib/xml/etree/ElementPath.py
index ab6b79a..361f6d5 100644
--- a/Lib/xml/etree/ElementPath.py
+++ b/Lib/xml/etree/ElementPath.py
@@ -80,7 +80,7 @@
                     raise KeyError
                 yield token[0], "{%s}%s" % (namespaces[prefix], uri)
             except KeyError:
-                raise SyntaxError("prefix %r not found in prefix map" % prefix)
+                raise SyntaxError("prefix %r not found in prefix map" % prefix) from None
         else:
             yield token