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	▲	riazrizvi 9 hours ago
		The titles are oddly worded. For example - `Collection Access and Iteration How fast can you get data out of Python’s built-in collections? Here is a dramatic example of how much faster the correct data structure is. item in set or item in dict is 200x faster than item in list for just 1,000 items!` It seems to suggest an iteration for x in mylist is 200x slower than for x in myset. It’s the membership test that is much slower. Not the iteration. (Also for x in mydict is an iteration over keys not values, and so isn’t what we think of as an iteration on a dict’s ‘data’). Also the overall title “Python Numbers Every Programmer Should Know” starts with 20 numbers that are merely interesting. That all said, the formatting is nice and engaging.