Python Memory Management and Tips Transcripts
Chapter: Python variables and memory
Lecture: CPython long source
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Alright, we've taken the red pill, let's go explore. Over here, I'd like to enter that link bit.ly/cPythonlong
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and it'll redirect us over to this horrible url, which you can see now why I was using Bitly to shorten it. This is, in the Python organization,
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the CPython project in the longobject.c file, and this is the PyObject
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PyLong_FromLong, and you can just go through and you can see all the stuff that's
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happening that's going on here. So there's all the stuff I deleted we're still in the same function and still in the same function.
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When are we done? Goes for aways. There's quite a bit going on here. Let's go to the top. You can see that this is the long,
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arbitrary precision integer object implementation. And in this objects section, you'll see all different sorts of things,
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like Booleans, and then you've got dictionaries, here's part of the dictionary implementation. There's the allocation stuff. obmalloc.
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Here's the base PyObject. Um, yup, PyObject pointers all over the place,
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Right? This thing. So this is the implementation for that and one thing that's interesting
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is, you would think just the base class would be pretty simple, but it's 2000 lines long, like the header file. The header file, if you go up,
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is already, I think, like 600 lines long. So there's a lot of stuff going on with every one of these objects,
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and throughout various places in the course, I'll be giving you the short your url's, which will take you to different locations in the source code.
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You don't have to go look at it, especially if all the code here makes your eyes water. That's fine. You don't have to look at it.
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But this is where you can go and see exactly what is happening and when or
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what kind of data is being stored and what structure and how the runtime is using that to manage the memory or allocate things and so on.