diff --git a/workspaces/adventure-pack/goodies/python3/src/traverse_postorder/__init__.py b/workspaces/adventure-pack/goodies/python3/src/traverse_postorder/__init__.py
new file mode 100644
index 00000000..df2a821e
--- /dev/null
+++ b/workspaces/adventure-pack/goodies/python3/src/traverse_postorder/__init__.py
@@ -0,0 +1,30 @@
+from typing import Generator, Optional
+
+
+class TreeNode:
+    def __init__(
+        self,
+        val: int = 0,
+        left: Optional["TreeNode"] = None,
+        right: Optional["TreeNode"] = None,
+    ):
+        self.val = val
+        self.left = left
+        self.right = right
+
+
+def traverse_postorder(
+    root: Optional[TreeNode],
+) -> Generator[TreeNode, None, None]:
+    stack = [(root, False)] if root else []
+    while stack:
+        node, did_traverse_children = stack.pop()
+        if did_traverse_children:
+            yield node
+            continue
+
+        stack.append((node, True))
+        if node.right:
+            stack.append((node.right, False))
+        if node.left:
+            stack.append((node.left, False))
diff --git a/workspaces/adventure-pack/goodies/python3/src/traverse_postorder/goody.json b/workspaces/adventure-pack/goodies/python3/src/traverse_postorder/goody.json
new file mode 100644
index 00000000..eb00d32e
--- /dev/null
+++ b/workspaces/adventure-pack/goodies/python3/src/traverse_postorder/goody.json
@@ -0,0 +1,3 @@
+{
+  "name": "traverse_postorder"
+}
diff --git a/workspaces/adventure-pack/goodies/python3/src/traverse_postorder/test.py b/workspaces/adventure-pack/goodies/python3/src/traverse_postorder/test.py
new file mode 100644
index 00000000..bbe67841
--- /dev/null
+++ b/workspaces/adventure-pack/goodies/python3/src/traverse_postorder/test.py
@@ -0,0 +1,82 @@
+from . import *
+
+
+def test_empty_tree() -> None:
+    assert list(traverse_postorder(None)) == []
+
+
+def test_root_only() -> None:
+    root = TreeNode(10)
+    assert [node.val for node in traverse_postorder(root)] == [10]
+
+
+def test_left_child_only() -> None:
+    root = TreeNode(10)
+    root.left = TreeNode(4)
+    assert [node.val for node in traverse_postorder(root)] == [4, 10]
+
+
+def test_right_child_only() -> None:
+    root = TreeNode(10)
+    root.right = TreeNode(6)
+    assert [node.val for node in traverse_postorder(root)] == [6, 10]
+
+
+def test_unbalanced_tree() -> None:
+    root = TreeNode(2)
+    root.left = TreeNode(4)
+    root.right = TreeNode(5)
+    root.left.left = TreeNode(7)
+    root.left.right = TreeNode(8)
+    root.left.left.left = TreeNode(10)
+
+    assert [node.val for node in traverse_postorder(root)] == [
+        10,
+        7,
+        8,
+        4,
+        5,
+        2,
+    ]
+
+
+def test_large_tree() -> None:
+    root = TreeNode(1)
+    root.left = TreeNode(2)
+    root.right = TreeNode(3)
+    root.left.left = TreeNode(4)
+    root.left.right = TreeNode(5)
+    root.right.left = TreeNode(6)
+    root.right.right = TreeNode(7)
+    root.left.left.left = TreeNode(8)
+    root.left.left.right = TreeNode(9)
+    root.left.right.left = TreeNode(10)
+    root.left.right.right = TreeNode(11)
+
+    assert [node.val for node in traverse_postorder(root)] == [
+        8,
+        9,
+        4,
+        10,
+        11,
+        5,
+        2,
+        6,
+        7,
+        3,
+        1,
+    ]
+
+
+# TODO: delete test case once types are enforced for python goodies
+def test_traverse_generator() -> None:
+    root = TreeNode(1)
+    root.left = TreeNode(2)
+    root.right = TreeNode(3)
+    root.left.left = TreeNode(4)
+
+    traverse = traverse_postorder(root)
+    assert next(traverse).val == 4
+    assert next(traverse).val == 2
+    assert next(traverse).val == 3
+    assert next(traverse).val == 1
diff --git a/workspaces/adventure-pack/goodies/python3/src/traverse_preorder/test.py b/workspaces/adventure-pack/goodies/python3/src/traverse_preorder/test.py
index 94c7e865..5e3e2e70 100644
--- a/workspaces/adventure-pack/goodies/python3/src/traverse_preorder/test.py
+++ b/workspaces/adventure-pack/goodies/python3/src/traverse_preorder/test.py
@@ -61,6 +61,7 @@ def test_large_tree() -> None:
     ]
 
 
+# TODO: delete test case once types are enforced for python goodies
 def test_traverse_generator() -> None:
     root = TreeNode(1)
     root.left = TreeNode(2)
diff --git a/workspaces/adventure-pack/src/app/__tests__/__snapshots__/equip-test.ts.snap b/workspaces/adventure-pack/src/app/__tests__/__snapshots__/equip-test.ts.snap
index c4483bcc..fd75986e 100644
--- a/workspaces/adventure-pack/src/app/__tests__/__snapshots__/equip-test.ts.snap
+++ b/workspaces/adventure-pack/src/app/__tests__/__snapshots__/equip-test.ts.snap
@@ -2321,6 +2321,45 @@ def is_palindrome(sequence: list | str) -> bool:
 ########################### END ADVENTURE PACK CODE ############################"
 `;
 
+exports[`App can equip single goody: Python 3 traverse_postorder 1`] = `
+"########################## BEGIN ADVENTURE PACK CODE ###########################
+# Adventure Pack commit fake-commit-hash
+# Running at: https://example.com/
+
+from typing import Generator, Optional
+
+
+class TreeNode:
+    def __init__(
+        self,
+        val: int = 0,
+        left: Optional["TreeNode"] = None,
+        right: Optional["TreeNode"] = None,
+    ):
+        self.val = val
+        self.left = left
+        self.right = right
+
+
+def traverse_postorder(
+    root: Optional[TreeNode],
+) -> Generator[TreeNode, None, None]:
+    stack = [(root, False)] if root else []
+    while stack:
+        node, did_traverse_children = stack.pop()
+        if did_traverse_children:
+            yield node
+            continue
+
+        stack.append((node, True))
+        if node.right:
+            stack.append((node.right, False))
+        if node.left:
+            stack.append((node.left, False))
+
+########################### END ADVENTURE PACK CODE ############################"
+`;
+
 exports[`App can equip single goody: Python 3 traverse_preorder 1`] = `
 "########################## BEGIN ADVENTURE PACK CODE ###########################
 # Adventure Pack commit fake-commit-hash
diff --git a/workspaces/adventure-pack/src/app/__tests__/__snapshots__/render-test.ts.snap b/workspaces/adventure-pack/src/app/__tests__/__snapshots__/render-test.ts.snap
index e9704e85..3bb3edee 100644
--- a/workspaces/adventure-pack/src/app/__tests__/__snapshots__/render-test.ts.snap
+++ b/workspaces/adventure-pack/src/app/__tests__/__snapshots__/render-test.ts.snap
@@ -1343,6 +1343,39 @@ exports[`App can render goody: Python 3 is_palindrome 1`] = `
     return True"
 `;
 
+exports[`App can render goody: Python 3 traverse_postorder 1`] = `
+"from typing import Generator, Optional
+
+
+class TreeNode:
+    def __init__(
+        self,
+        val: int = 0,
+        left: Optional["TreeNode"] = None,
+        right: Optional["TreeNode"] = None,
+    ):
+        self.val = val
+        self.left = left
+        self.right = right
+
+
+def traverse_postorder(
+    root: Optional[TreeNode],
+) -> Generator[TreeNode, None, None]:
+    stack = [(root, False)] if root else []
+    while stack:
+        node, did_traverse_children = stack.pop()
+        if did_traverse_children:
+            yield node
+            continue
+
+        stack.append((node, True))
+        if node.right:
+            stack.append((node.right, False))
+        if node.left:
+            stack.append((node.left, False))"
+`;
+
 exports[`App can render goody: Python 3 traverse_preorder 1`] = `
 "from typing import Generator, Optional