René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Functions notes","articleBody":"\u003cul\u003e\r\n\u003cli\u003eNamespaces are new (I know they're marked as \"revisited\" in the notes, but they never appear before – alternatively, we can add them to Python basics?\u003c/li\u003e\r\n\u003cli\u003e\r\n\r\n\u003e Builtins: you shouldn't be naming variables that overwrite Python's builtins (abs, len, list - a full list is available here) in the first place, but in the event that you are, Python will check here anyways. 🙃\r\n\r\nEither this is incorrect or I'm getting confused by it. Consider, for example:\r\n\r\n```python\r\nsum = 3\r\nsum(1, 2, 3) # TypeError: 'int' object is not callable\r\n```\r\n\r\nIn this code, Python will use `3` in place of the builtin `sum` when `sum` is referenced. That means Python a) doesn't \"check here [the builtins] anyways\" because it stops once it finds `sum` in the global table, b) it's a little misleading to say that we're \"overwriting\" the builtin even though we talk that way – you can still access it with `__builtins__.sum`.\r\n\u003c/li\u003e\r\n\u003cli\u003e\r\n\r\n\u003e When calling a function, Python enforces that positional arguments must appear in the function call before keyword arguments.\r\n\r\nMight want to mention why?\r\n\u003c/li\u003e\r\n\u003cli\u003eThis is kinda painful, but it's not precise to describe the first/second line(s) of execution like you do.\u003c/li\u003e\r\n\u003cli\u003eYou never mentioned that \"if this is confusing, you can treat mutable objects like pass-by-reference and immutable objects like pass-by-value.\"\u003c/li\u003e\r\n\u003cli\u003eCan we rename `euclidean_dist`? I think some students might not know what that means.\u003c/li\u003e\r\n\u003c/ul\u003e\r\n\r\nI didn't look over everything, but these are my initial thoughts!","author":{"url":"https://github.com/parthsarin","@type":"Person","name":"parthsarin"},"datePublished":"2020-08-22T04:10:29.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/2/course-reader/issues/2"}