23 def follow_path(obj, path):  argument
24   cur = obj
37 def ensure_path(obj, path):  argument
38   cur = obj
50   def apply(self, obj, val):  argument
51     cur, key = ensure_path(obj, self)
56   def apply(self, obj, val):  argument
57     cur, key = follow_path(obj, self)
63   def apply(self, obj):  argument
64     cur, key = follow_path(obj, self)
70   def apply(self, obj, *args):  argument
71     cur, key = ensure_path(obj, self)
106       obj = json.load(f, object_pairs_hook=collections.OrderedDict)
108     obj = json.load(sys.stdin, object_pairs_hook=collections.OrderedDict)
111     p[0].apply(obj, *p[1:])
115       json.dump(obj, f, indent=2, separators=(',', ': '))
118     print(json.dumps(obj, indent=2, separators=(',', ': ')))