Issue #13782: streamline argument type-checking in ET.Element
append, extend and insert now consistently type-check their argument in both
the C and Python implementations, and raise TypeError for non-Element
argument.
Added tests
diff --git a/Lib/xml/etree/ElementTree.py b/Lib/xml/etree/ElementTree.py
index 10ee896..5f974f6 100644
--- a/Lib/xml/etree/ElementTree.py
+++ b/Lib/xml/etree/ElementTree.py
@@ -298,7 +298,7 @@
# @param element The element to add.
def append(self, element):
- # assert iselement(element)
+ self._assert_is_element(element)
self._children.append(element)
##
@@ -308,8 +308,8 @@
# @since 1.3
def extend(self, elements):
- # for element in elements:
- # assert iselement(element)
+ for element in elements:
+ self._assert_is_element(element)
self._children.extend(elements)
##
@@ -318,9 +318,13 @@
# @param index Where to insert the new subelement.
def insert(self, index, element):
- # assert iselement(element)
+ self._assert_is_element(element)
self._children.insert(index, element)
+ def _assert_is_element(self, e):
+ if not isinstance(e, Element):
+ raise TypeError('expected an Element, not %s' % type(e).__name__)
+
##
# Removes a matching subelement. Unlike the <b>find</b> methods,
# this method compares elements based on identity, not on tag