🌐 Mailman 3 February 2023 - Python-list - python.org

Re: one Liner: Lisprint(x) --> (a, b, c) instead of ['a', 'b', 'c']
by Greg Ewing Feb. 28, 2023

Feb. 28, 2023

On 28/02/23 4:24 pm, Hen Hanna wrote: > is it poss. to peek at the Python-list's messages without joining ? It's mirrored to the comp.lang.python usenet group, or you can read it through gmane with a news client. -- Greg

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Rob Cliffe should stop sending me rude email messages.
by Hen Hanna Feb. 27, 2023

Feb. 27, 2023

Rob Cliffe should stop sending me rude email messages. At the very least, Rob Cliffe should stop sending me ANY email messages, if he doesn't intend to an email i've sent him.

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Re: How to escape strings for re.finditer?
by Jen Kris Feb. 27, 2023

Feb. 27, 2023

string.count() only tells me there are N instances of the string; it does not say where they begin and end, as does re.finditer. Feb 27, 2023, 16:20 by bobmellowood(a)gmail.com: > Would string.count() work for you then? > > On Mon, Feb 27, 2023 at 5:16 PM Jen Kris via Python-list <> python-list(a)python.org> > wrote: > >> >> I went to the re module because the specified string may appear more than once in the string (in the code I'm writing). For example: >> >> a = "X - abc_degree + 1 + qq + abc_degree + 1" >> b = "abc_degree + 1" >> q = a.find(b) >> >> print(q) >> 4 >> >> So it correctly finds the start of the first instance, but not the second one. The re code finds both instances. If I knew that the substring occurred only once then the str.find would be best. >> >> I changed my re code after MRAB's comment, it now works. >> >> Thanks much. >> >> Jen >> >> >> Feb 27, 2023, 15:56 by >> cs(a)cskk.id.au>> : >> >> > On 28Feb2023 00:11, Jen Kris <>> jenkris(a)tutanota.com>> > wrote: >> > >> >> When matching a string against a longer string, where both strings have spaces in them, we need to escape the spaces. >> >> >> >> This works (no spaces): >> >> >> >> import re >> >> example = 'abcdefabcdefabcdefg' >> >> find_string = "abc" >> >> for match in re.finditer(find_string, example): >> >> print(match.start(), match.end()) >> >> >> >> That gives me the start and end character positions, which is what I want. >> >> >> >> However, this does not work: >> >> >> >> import re >> >> example = re.escape('X - cty_degrees + 1 + qq') >> >> find_string = re.escape('cty_degrees + 1') >> >> for match in re.finditer(find_string, example): >> >> print(match.start(), match.end()) >> >> >> >> I’ve tried several other attempts based on my reseearch, but still no match. >> >> >> > >> > You need to print those strings out. You're escaping the _example_ string, which would make it: >> > >> > X - cty_degrees \+ 1 \+ qq >> > >> > because `+` is a special character in regexps and so `re.escape` escapes it. But you don't want to mangle the string you're searching! After all, the text above does not contain the string `cty_degrees + 1`. >> > >> > My secondary question is: if you're escaping the thing you're searching _for_, then you're effectively searching for a _fixed_ string, not a pattern/regexp. So why on earth are you using regexps to do your searching? >> > >> > The `str` type has a `find(substring)` function. Just use that! It'll be faster and the code simpler! >> > >> > Cheers, >> > Cameron Simpson <>> cs(a)cskk.id.au>> > >> > -- >> > >> https://mail.python.org/mailman/listinfo/python-list >> > >> >> -- >> >> https://mail.python.org/mailman/listinfo/python-list >> > > > -- > **** Listen to my CD at > http://www.mellowood.ca/music/cedars> **** > Bob van der Poel ** Wynndel, British Columbia, CANADA ** > EMAIL: > bob(a)mellowood.ca > WWW: > http://www.mellowood.ca >

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Re: it seems like a few weeks ago... but actually it was more like 30 years ago that i was programming in C, and
by Greg Ewing Feb. 27, 2023

Feb. 27, 2023

On 28/02/23 7:40 am, avi.e.gross(a)gmail.com wrote: > inhahe <inhahe(a)gmail.com> made the point that this may not have been the original intent for python and may be a sort of bug that it is too late to fix. Guido has publically stated that it was a deliberate design choice. The merits of that design choice can be debated, but it wasn't a bug or an accident. -- Greg

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Re: Python 3.10 Fizzbuzz
by rbowman Feb. 27, 2023

Feb. 27, 2023

On Mon, 27 Feb 2023 11:08:22 -0500, Thomas Passin wrote: > I prefer single quotes because they are easier to type. There is that. JavaScript makes me lazy and C# slaps my knuckles with a steel edged ruler.

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Re: TypeError: can only concatenate str (not "int") to str
by Hen Hanna Feb. 27, 2023

Feb. 27, 2023

On Sunday, February 26, 2023 at 6:41:01 AM UTC-8, Thomas Passin wrote: > On 2/25/2023 8:12 PM, Hen Hanna wrote: > > 2. the rude guy ('dn') hasn't offered a single word of comment that's directly relevant to it. > > > -------- but he did offer related stuff which he thinks i should be [grateful] for > Please let's stop the ad hominem messages. If someone doesn't like a > particular person's messages, send them to spam or don't read them. If > too many people start to get too rude or personal, remind the whole list > of the guidelines for respectful participation. If you feel that > someone's contribution was especially helpful in part because it was > concise and to the point, you could say that. yes. let's stop... If you (Thomas Passin) feel that someone's contribution was especially helpful in part because it was concise and to the point, you could say that. and pls don't hesitate to reproduce such a comment. i'm sure a few others were also rude, but it was the rudest of them all ('dn') that told me to read some [Code of Conduct] document. -------- Do not EVER do that again. Another rude guy who "asked" me why i write in a Hard-to-read way.... Why don't you at least also make a comment that's On-Topic besides the insulting remark ? so far, i think Paul Rubin's post (in another thread) was esp. concise, informative, --- but he's also made a comment about 'shunting' beginners (questions) to a concentration camp, and sounded a bit like a cold-hearted (or warm-hearted) Nazi officer / scientist. I think you can speed this up by building two sets and intersecting them: ================================================================ from itertools import combinations ww = "JSOYOMFUBELR SCDUARWDRLYE DASNAGEFERTY CLULOOTSCEHN USENEARSEYNE".split() ss = set(''.join(s) for w in ww for s in combinations(w.lower(),6)) d6 = set(d.strip().lower() for d in open('/usr/share/dict/words') if len(d)==7) print(ss & d6) i too often use short Var names x, xx, w,ww, s,ss .......... and also long ones.

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it seems like a few weeks ago... but actually it was more like 30 years ago that i was programming in C, and
by Hen Hanna Feb. 27, 2023

Feb. 27, 2023

it seems like a few weeks ago... but actually it was more like 30 years ago that i was programming in C, and i'd get [Segmentation Fault] (core dumped) [Bus Error] (core dumped) [access violation] (core dumped) [bad address] and, yes, some of us sometimes analyzed the core file. i (vaguely) fantasized that someday programming would be much more pleasant ---------- and that programming language would be something like Common Lisp with a more Algol, Pascal (C) like syntax. i've been using Python for 3,4 years and .............. for the first several weeks... whenever i used Python... all i could think of....was -------- this is really Lisp (inside) with a thin veil of Java/Pascal syntax.......... ----- that everything is first converted (macro-expanded) into (intermediated) Lisp code, and then.........

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Python type system
by Weatherby,Gerard Feb. 27, 2023

Feb. 27, 2023

When I first started transitioning to Python as a Perl replacement, with my Java/C++ baggage, I thought Pythnon had some loosey-goosey type system. I thought int() and str() were casts, not constructors. I now realize Python has a great strong type system. Duck typing. If it walks like a duck, quacks like a duck, it’s probably a duck. (C++ added the auto keyword at some point to get analogous behavior). Beyond Python, I’ve also found duck typing useful in real life. If it walks like a troll, quacks like a troll …

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Hen Hanna & google groups
by Ethan Furman Feb. 27, 2023

Feb. 27, 2023

Greetings, all! As has been stated, Hen Hanna is posting through Google Groups, over which the Python List moderators have zero control. The only thing we can do, and which has now been done, is not allow those posts in to the Python List. -- ~Ethan~ Moderator

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Re: Line continuation and comments
by Robert Latest Feb. 27, 2023

Feb. 27, 2023

Paul Bryan wrote: > Adding to this, there should be no reason now in recent versions of > Python to ever use line continuation. Black goes so far as to state > "backslashes are bad and should never be used": > > https://black.readthedocs.io/en/stable/the_black_code_style/ future_style.html#using-backslashes-for-with-statements Then I wonder how Mr. Black would go about these long "dot chaining" expressions that packages like pandas and sqlalchemy require.

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