Python has no(?) multiset

I saw an online resource that claimed “The collections.Counter class in the Python standard library implements a multiset (or bag) type that allows elements in the set to have more than one occurrence.” However, (and despite the fact that he is quoting comments in the CPython source code,) this is misleading. While the collections.Counter class does allow you to have more than 1 occurrence of elements in a set, …

Weird issues trying to transfer a domain (XYZ's EPP infrastructure broken?)

tldr: XYZ infrastructure is literally collapsing, they couldn't transfer in one of their own domains without a staff override. Initial transfer attempt Namecheap e-mails me the “transfer Authorization Code” Gen.xyz web interface claims “Invalid EPP Code” I contact Gen.xyz support Gen.xyz staff tells me“Please request a new EPP code from Namecheap” I contact Namecheap support via web chat “I need a new EPP for my domain, ishygddt.xyz; XYZ support …

EC point serialization formats

I looked into this when trying to make a piece of toy software to serialize and de-serialize *all* OpenSSH-supported public key formats. While OpenSSH uses standardized formats for private keys, the ssh-* AAAA/3NzaC0… format you're used to pasting into remote servers is actually a "proprietary" (though with freely-licensed spec and implementation) encoding—it's not JSON, and not any standardized BER/DER codec; instead, it's mostly a Length-Value encoding (think TLV without the T) …

the real frozendict was the standard library we neglected along the way

If you need a quick immutable representation of dictionaries, but can't be bothered with a 3rd-party library, why not try frozenset(dict_items)? It is immutable. It is in the standard library. It is unordered, so you're guaranteed that frozenset([('a', 1), ('b', 2)]) == frozenset([('b', 2), ('a', 1)]). And it is the case that, for dictionaries with all immutable values (which is implied by the problem statement anyway), dict(frozenset(d.items())) == d. …

IA5string definition

From ITU-T Rec. X.680 (02/21): C.5.7 IA5String [is] mapped into UniversalString by mapping each character into the UniversalString character that has the identical (32-bit) value in the BER encoding of UniversalString as the (8-bit) value of the BER encoding of IA5String[.] 41.6 The characters which can appear in the UniversalString type are any of the characters allowed by ISO/IEC 10646 [aka Unicode]. 43.8 For IA5String, [the] entire character set …

Ordered merge of iterables in Python

Just found out about this cool feature in the Python standard library that allows you to merge two iterables based on a comparison: from heapq import merge as merge_heapwise some_numbers = (1, 5, 10, 15) other_numbers = (2, 4, 6, 8, 10, 12, 14, 16) merged_numbers = tuple(merge_heapwise(some_numbers, other_numbers)) # Using a tuple so comparisons work, for didactic demo reasons assert merged_numbers == (1, 2, 4, 5, 6, 8, …

[DRAFT] Transcript: Lance Owens MD, “Jung, Tolkien, and the Hermeneutics of Vision”, 2015

“Jung, Tolkien and the Hermeneutics of Vision” Dr. Lance S. Owens 23 October 2015 California Institute of Integral Studies The Philosophy, Cosmology and Consciousness Forum Transcribed from youtube.com/video/GxVaxOco7kg and adapted for the web [PUNCTUATION, GRAMMAR, AND QUALITY PASSES STILL WIP] by James Edington in 2023 Opening Remarks (A shout out to my introduction speaker tonight, Becca; the stuff she has done on Jung, The Red Book, and Tolkien is …