Added a path extension that exposes datum's path from the jsonpath itself

jsonpath_ng/ext/iterable.py

@@ -116,3 +116,28 @@ def __str__(self):
 
     def __repr__(self):
         return 'Keys()'
+
+class Path(JSONPath):
+    """The JSONPath referring to the path of the current object.
+    Concrete syntax is 'path`'.
+    """
+
+    def find(self, datum):
+        datum = DatumInContext.wrap(datum)
+        try:
+            value = str(datum.path)
+        except Exception as e:
+            return []
+        else:
+            return [DatumInContext(value,
+                                   context=datum,
+                                   path=Path())]
+
+    def __eq__(self, other):
+        return isinstance(other, Path)
+
+    def __str__(self):
+        return '`path`'
+
+    def __repr__(self):
+        return 'Path()'

jsonpath_ng/ext/parser.py

@@ -96,6 +96,8 @@ def p_jsonpath_named_operator(self, p):
             p[0] = _iterable.Len()
         elif p[1] == 'keys':
             p[0] = _iterable.Keys()
+        elif p[1] == 'path':
+            p[0] = _iterable.Path()
         elif p[1] == 'sorted':
             p[0] = _iterable.SortedThis()
         elif p[1].startswith("split("):

tests/test_jsonpath_rw_ext.py

@@ -68,6 +68,12 @@
         ["cow", "cat"],
         id="keys_dict",
     ),
+    pytest.param(
+        "objects.cow.`path`",
+        {"objects": {"cow": "moo", "cat": "neigh"}},
+        "cow",
+        id="path_dict",
+    ),
     pytest.param(
         "objects[?cow]",
         {"objects": [{"cow": "moo"}, {"cat": "neigh"}]},