Python 103: Mmmm... Understanding Python's Memory Model, Mutability, and Methods
summary
Explains why Python passes object references and how mutability changes observable behavior, demonstrates CPython’s reference counting plus a cycle detector and the undocumented small-int interning up to 256, shows pitfalls with aliasing vs shallow copies and how copy.deepcopy fixes them. Builds a Time60 class with __str__ and __add__ that normalizes minutes to hours (works in examples). Gives performance tips using timeit, caching repeated len()/func calls, describes list growth (amortized doubling then tapering) and recommends collections.deque for fast pops/pushes at both ends.
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chapters (6)
- 0:00Start
- 1:58How I Got Started
- 23:23Special Methods
- 1:11:59Memory Allocation
- 1:14:58Shrinking
- 1:15:50Double Ended Queue
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