Update to release v2.0.5

.travis.yml

@@ -4,7 +4,7 @@ python:
   - "3.7"
   - "3.8"
   - "3.9"
-  - "pypy3"
+  - "pypy3.7"
 before_install:
   - sudo apt-get update && sudo apt-get --reinstall install -qq language-pack-en language-pack-de language-pack-it
 install:

CHANGELOG.rst

@@ -4,6 +4,7 @@ CHANGELOG
 
 `v2.0.5`_ (2020-12-02)
 ======================
+* Increase the speed of path step selection on large trees
 * More tests and small fixes to XSD builtin datatypes
 
 `v2.0.4`_ (2020-10-30)

elementpath/xpath2/xpath2_functions.py

@@ -45,10 +45,7 @@
 def evaluate(self, context=None):
     if context is None:
         raise self.missing_context()
-    elif context.item is None:
-        return context.root
-    else:
-        return context.item
+    return context.root if context.item is None else context.item
 
 
 ###
@@ -124,9 +121,7 @@ def select(self, context=None):
         # For lxml returns Element's prefixes
         if 'xml' not in elem.nsmap:
             yield 'xml'
-        for prefix in elem.nsmap:
-            if prefix:
-                yield prefix
+        yield from filter(lambda x: x, elem.nsmap)
     else:
         # For ElementTree returns module registered prefixes
         prefixes = {x for x in self.parser.namespaces if x}

tests/test_xpath1_parser.py

@@ -1149,6 +1149,7 @@ def test_namespace_axis(self):
             + [('tst', 'http://xpath.test/ns')]
         self.check_selector('/A/namespace::*', root, expected=set(namespaces),
                             namespaces=namespaces[-1:])
+        self.check_value('namespace::*', MissingContextError)
 
     def test_parent_shortcut_and_axis(self):
         root = self.etree.XML(

tests/test_xpath2_functions.py

@@ -740,9 +740,19 @@ def test_in_scope_prefixes_function(self):
             self.assertNotIn('p1', prefixes)
             self.assertIn('p2', prefixes)
 
+            # Provides namespaces through the dynamic context
+            selector = Selector("fn:in-scope-prefixes(.)", parser=type(self.parser))
+            prefixes = selector.select(root, namespaces=namespaces)
+
+            self.assertIn('p0', prefixes)
+            self.assertNotIn('p1', prefixes)
+            self.assertIn('p2', prefixes)
+
         with self.assertRaises(TypeError):
             select(root, "fn:in-scope-prefixes('')", namespaces, parser=type(self.parser))
 
+
+
         if xmlschema is not None:
             schema = xmlschema.XMLSchema("""
                 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" 

tests/test_xpath_context.py

@@ -103,6 +103,13 @@ def test_get_parent(self):
             id(context._parent_map), parent_map_id  # LRU cache prevents parent map rebuild
         )
 
+        document = ElementTree.ElementTree(root)
+        context = XPathContext(root=document)
+
+        self.assertEqual(context.get_parent(root[1]), root)
+        self.assertEqual(context.get_parent(root[2]), root)
+        self.assertEqual(context.get_parent(root[2][1]), root[2])
+
     def test_get_path(self):
         root = ElementTree.XML('<A><B1><C1/></B1><B2/><B3><C1/><C2 max="10"/></B3></A>')
 
@@ -119,6 +126,11 @@ def test_get_path(self):
         context._elem = root[2][1]
         self.assertEqual(context.get_path(AttributeNode('max', '10')), '/A/B3/C2/@max')
 
+        document = ElementTree.ElementTree(root)
+        context = XPathContext(root=document)
+
+        self.assertEqual(context.get_path(root[2][0]), '/A/B3/C1')
+
         root = ElementTree.XML('<A><B1>10</B1><B2 min="1"/><B3/></A>')
         context = XPathContext(root)
         with patch.object(DummyXsdType(), 'is_simple', return_value=True) as xsd_type: