Comments for Yet Another Python Internals Blog

Comment on The Garbage Collector by lpoulain

Mon, 19 Oct 2020 12:35:23 +0000

In reply to stef1996.

That I don’t know. That would be a question for the Python team.

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Comment on The Garbage Collector by stef1996

Mon, 19 Oct 2020 10:12:38 +0000

Ok, why using this multi-pass “gc_ref” mechanism, instead of “just” runing an “epoch” that would directly get unreachable items then deleted them ?

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Comment on The Garbage Collector by lpoulain

Sun, 18 Oct 2020 17:34:15 +0000

In reply to stef1996.

Not really. For Java and C# have a mark-and-sweep when they kick start the GC on a regular basis. When it does, they mark the objects and then remove them. Python, on the other hand, keeps a tab on the number of references pointing to each and every object and deletes them as soon as this counter is zero. The only “mark-and-sweep” is to delete circular references.

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Comment on The Garbage Collector by stef1996

Sun, 18 Oct 2020 08:59:15 +0000

Is it the famous “mark-and-sweep” ?

Nice article, thanks…

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Comment on The Garbage Collector by Python Garbage Collection – Kangho Kenneth Yoon

Sat, 16 May 2020 12:13:14 +0000

[…] are dealt with GC module, which we can call generational cyclic GC. You can read the details here (https://pythoninternal.wordpress.com/2014/08/04/the-garbage-collector/). It is optimized using 3 generations, where new objects in young generation are scanned more […]

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Comment on Everything’s an object by lpoulain

Sun, 24 Dec 2017 18:23:29 +0000

Not really. Keywords such as “def”, “=” or “class” are just a way for Python to parse the source code. When you type “def myFunc() …”, a “myFunc” object gets created but “def” is not, because it’s just a convention to tell Python that you defined a function.

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Comment on Everything’s an object by Moondra

Sun, 24 Dec 2017 18:11:42 +0000

In reply to lpoulain.

Thank you. However, if everything is an object in Python, keywords should also be an object of some class right? What class are keywords objects of?

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Comment on Everything’s an object by lpoulain

Thu, 21 Dec 2017 04:42:38 +0000

In reply to Moondra.

def is not a type, it is a keyword used to create a function.

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Comment on Everything’s an object by Moondra

Thu, 21 Dec 2017 01:46:05 +0000

What is different about def that type(def) doesn’t work?
Is def not an object?

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Comment on Variables and integers by lpoulain

Thu, 07 Aug 2014 19:17:48 +0000

In reply to xiaobingjiang.

What I meant is that the preallocated numbers seem to for the [-5, 256] range. A comment in the source says “The integers that are preallocated are those in the range -NSMALLNEGINTS (inclusive) to NSMALLPOSINTS (not inclusive).”

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