New ask Hacker News story: Ask HN: What's your most “salient lines of code” from your weekend project?

Ask HN: What's your most “salient lines of code” from your weekend project?
2 by faizshah | 2 comments on Hacker News.
I made this ~10 liner deep dict diff. It's an abomination but also kind of fun, useful for my project where I'm reverse engineering a deeply nested api. ``` def deep_diff(first, second): """~10 liner find the differences between deeply nested dictionaries.""" return { # recursive case k: deep_diff(v1, v2) # Base case, if this depth differs, return the diff. if isinstance(v1, dict) and isinstance(v2, dict) else {"diff": diff, "first": v1, "second": v2} # Get the keys from both dictionaries at the same level of depth. for k in first.keys() | second.keys() # Test the differences at this depth level. for diff, v1, v2 in [ (operator.ne(first.get(k), second.get(k)), first.get(k), second.get(k)) ] } ``` ``` >>> pprint(deep_diff(a,{*a, 'hello': None})) {'hello': {'diff': True, 'first': {'chello': 1}, 'second': None}} >>> pprint(deep_diff(a,{*a, 'hello': {'chello': 1, 'aloha': 2}})) {'hello': {'aloha': {'diff': True, 'first': None, 'second': 2}, 'chello': {'diff': False, 'first': 1, 'second': 1}}} ```