Python Lists Are NOT Lists — How They Work Under the Hood #shorts #python

Python lists aren't linked lists; they're dynamic arrays of C pointers. Python allocates a contiguous memory block, a PyListObject, with an internal capacity. When you append, Python often just places the new item's pointer into an existing empty slot within that block—a single, efficient memory write.

Understanding these python internals helps you write more performant Python code by anticipating how CPython handles memory. This is Day 7 of Python under the hood — follow Devlore for daily deep dives.

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