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Python's Data Model Explained through Visualization
(programming.dev)
An exercise to help build the right mental model for Python data.
- Solution: https://memory-graph.com/#codeurl=https%3A%2F%2Fraw.githubusercontent.com%2Fbterwijn%2Fmemory_graph_videos%2Frefs%2Fheads%2Fmain%2Fexercises%2Fexercise9.py&play=
- Explanation: https://github.com/bterwijn/memory_graph?tab=readme-ov-file#python-data-model
The โSolutionโ link visualizes execution and reveals whatโs actually happening using ๐บ๐ฒ๐บ๐ผ๐ฟ๐_๐ด๐ฟ๐ฎ๐ฝ๐ต: https://github.com/bterwijn/memory_graph
Let's look at the suspects.
b.append(), you add to the existing list. This mutates the current list. You can not be the culprit.
b = b + [], you join up lists, making a new list in the process, that then gets stored in variable b, without changing the original list that's still stored in variable a. You are not the culprit either.
No, the culprit must be someone that ambiguously looks both like a mutation and an instantiation.
Isn't that right, b += []? Because the culprit... IS YOU!