diff --git a/third_party/3/lxml/etree.pyi b/third_party/3/lxml/etree.pyi
index 958c82a1d7a9..ec2d9989537d 100644
--- a/third_party/3/lxml/etree.pyi
+++ b/third_party/3/lxml/etree.pyi
@@ -17,15 +17,35 @@ _DictAnyStr = Union[Dict[str, str], Dict[bytes, bytes]]
 _Dict_Tuple2AnyStr_Any = Union[Dict[Tuple[str, str], Any], Tuple[bytes, bytes], Any]
 
 
-class ElementChildIterator(Iterator['_Element']):
+class _ElementMatchIterator(Iterator['_Element']):
+    def __iter__(self) -> '_ElementMatchIterator': ...
+    def __next__(self) -> '_Element': ...
+
+class ElementChildIterator(_ElementMatchIterator):
     def __iter__(self) -> 'ElementChildIterator': ...
+
+class AncestorsIterator(_ElementMatchIterator):
+    def __iter__(self) -> 'AncestorsIterator': ...
+
+class SiblingsIterator(_ElementMatchIterator):
+    def __iter__(self) -> 'SiblingsIterator': ...
+
+class ElementDepthFirstIterator(Iterator['_Element']):
+    def __iter__(self) -> 'ElementDepthFirstIterator': ...
     def __next__(self) -> '_Element': ...
 
+class ElementTextIterator(Iterator[str]):
+    def __iter__(self) -> 'ElementTextIterator': ...
+    def __next__(self) -> str: ...
+
 class _Element(Iterable['_Element']):
+    # Docs: http://lxml.de/api/lxml.etree._Element-class.html
     def addprevious(self, element: '_Element') -> None: ...
     def addnext(self, element: '_Element') -> None: ...
     def clear(self) -> None: ...
+    # Attributes
     def get(self, key: _AnyStr, default: Optional[_AnyStr] = ...) -> _AnyStr: ...
+    def set(self, key: str, value: str) -> None: ...
     def xpath(self, _path: _AnyStr, namespaces: Optional[_DictAnyStr] = ..., extensions: Any = ..., smart_strings: bool = ..., **_variables: Any) -> Any: ...
     # indeed returns a Union[bool, float, _AnyStr, List[Union[ElementBase, _AnyStr, Tuple[]]]]: ...
     # http://lxml.de/xpathxslt.html#xpath-return-values
@@ -33,7 +53,31 @@ class _Element(Iterable['_Element']):
     text = ...  # type: _AnyStr
     tag = ...  # type: str
     def append(self, element: '_Element') -> '_Element': ...
+
+    # Iterators
     def __iter__(self) -> ElementChildIterator: ...
+    def iter(self,
+        tag: Optional[Union[str, _Element]]=...,
+        *tags: Any) -> ElementDepthFirstIterator: ...
+    def iterancestors(self,
+        tag: Optional[Union[str, _Element]]=...,
+        *tags: Any) -> AncestorsIterator: ...
+    def iterchildren(self,
+        tag: Optional[Union[str, _Element]]=...,
+        reversed=False,
+        *tags: Any) -> ElementChildIterator: ...
+    def iterdescendants(self,
+        tag: Optional[Union[str, _Element]]=...,
+        *tags: Any) -> ElementDepthFirstIterator: ...
+    def itersiblings(self,
+        tag: Optional[Union[str, _Element]]=...,
+        preceding=False,
+        *tags: Any) -> SiblingsIterator: ...
+    def itertext(self,
+        tag: Optional[Union[str, _Element]]=...,
+        with_tail=True,
+        *tags: Any) -> ElementTextIterator: ...
+
 
 class ElementBase(_Element): ...