What extended ASCII character set uses 0x9D?

[John Nagle]

On 08/17/2017 05:53 PM, Chris Angelico wrote:> On Fri, Aug 18, 2017 at 
10:30 AM, John Nagle <nagle at animats.com> wrote:
 >> On 08/17/2017 05:14 PM, John Nagle wrote:
 >>>       I'm cleaning up some data which has text description fields from
 >>> multiple sources.
 >> A few more cases:
 >>
 >> bytearray(b'\xe5\x81ukasz zmywaczyk')
 >
 > This one has to be Polish, and the first character should be the
 > letter Ł U+0141 or ł U+0142. In UTF-8, U+0141 becomes C5 81, which is
 > very similar to the E5 81 that you have.
 >
 > So here's an insane theory: something attempted to lower-case the byte
 > stream as if it were ASCII. If you ignore the high bit, 0xC5 looks
 > like 0x45 or "E", which lower-cases by having 32 added to it, yielding
 > 0xE5. Reversing this transformation yields sane data for several of
 > your strings - they then decode as UTF-8:
 >
 > miguel Ángel santos
 > lidija kmetič
 > Łukasz zmywaczyk
 > jiří urbančík
 > Ľubomír mičko
 > petr urbančík

    I think you're right for those.  I'm working from a MySQL dump of
supposedly LATIN-1 data, but LATIN-1 will accept anything. I've
found UTF-8 and Windows-2152 in there. It's quite possble that someone
lower-cased UTF-8 stored in a LATIN-1 field.  There are lots of
questions on the web which complain about getting a Python decode error
on 0x9d, and the usual answer is "Use Latin-1". But that doesn't really
decode properly, it just doesn't generate an exception.

 > That doesn't work for everything, though. The 0x81 0x81 and 0x9d ones
 > are still a puzzle.

    The 0x9d thing seems unrelated to the Polish names thing.  0x9d
shows up in the middle of English text that's otherwise ASCII.
Is this something that can appear as a result of cutting and
pasting from Microsoft Word?

    I'd like to get 0x9d right, because it comes up a lot. The
Polish name thing is rare.  There's only about a dozen of those
in 400MB of database dump. There are hundreds of 0x9d hits.

Here's some more 0x9d usage, each from a different data item:


Guitar Pro, JamPlay, RedBana\\\'s Audition,\x9d Doppleganger\x99s The 
Lounge\x9d or Heatwave Interactive\x99s Platinum Life Country,\\"

for example \\"I\\\'ve seen the bull run in Pamplona, Spain\x9d.\\" 
Everything

Netwise Depot is  a \\"One Stop Web Shop\\"\x9d that provides

sustainable \\"green\\"\x9d living

are looking for a \\"Do It for Me\\"\x9d solution


This has me puzzled.  It's often, but not always after a close quote.
"TM" or "(R)" might make sense, but what non-Unicode character set
has those.  And  "green"(tm) makes no sense.

				John Nagle