On Sun, Sep 5, 2021 at 10:32 AM David Mertz, Ph.D. <david.me...@gmail.com> wrote:
> Most Pandas read methods take either a path-like argument or a file-like > argument, and figure out which it is by introspection when called. > Actually, most of them even accept a URL-like argument as well > > I don't think this is a terrible approach. It doesn't make things quite as > explicit as the standard library generally does. > The folks in favor of adding this to json are split between overloading load() (my preference) and adding a new, explicit method: loadf() or something like that. Either way, it's useful. I honestly don't get the objection. MY takle is that mosto f the core devs are doing "systsms programming" rather than "scripting" -- which means that they a: Want to be more explicit and robust Need more flexibiilty around various file-like objects Don't mind a bit more expertise required. (e.g. specifying the encoding correctly) Don't mind a couple extra lines of code. So why add a function to make it simple and easy to read a file fro a path-like? I really wish the core devs would remember how useful Python is as a scripting language, and how many people use it that way. Pandas is a good example, I lot of folks use it in a scripting context, so it provided features that make it easy to do so. -CHB On Sun, Sep 5, 2021, 1:19 PM Christopher Barker <python...@gmail.com> wrote: > >> >> This would only be helpful when the CSV is on the disk but csv.reader() >>> takes a file object so that it can used with anything like a socket for >>> example. json.load() does the same thing. >>> >> >> There has been discussion about adding loading from a “path like” to the >> JSON lib. See this list about ten months ago and a recent thread on discuss. >> >> There resistance, but it ended with the idea that maybe there should be a >> PEP for a common interface for all “file” readers — eg JSON, CSV, etc.. And >> that interface could be supported by third party libs. That interface >> *maybe* would include a single step load from a path-like functionality. >> >> It seems to me that it is better to keep a generic interface that are >>> composable. >>> >> >> No one is suggesting removing the load-from-a-file-like interface. I have >> no idea why the fact that some people sometimes need a more flexible >> interface (maybe most people, even) somehow means that we shouldn’t make >> things easy and obvious for a common use case. >> >> -CHB >> >> >> >> >>> Cheers, >>> Rémi >>> >>> >>> >>> ? And something similar for ‘csv.reader’? I’m not wedded to the details >>> here. >>> >>> The two main reasons I think this might be a positive addition are - >>> >>> * you wouldn’t have to know or remember the right way to open a CSV file >>> (newline=“”). >>> * it elides very common code. >>> >>> but perhaps there are things I’m missing here? >>> >>> As a side note, I think ‘csv.reader’ could usefully be renamed to >>> something else (maybe just Reader?), since it’s kind of out of sync with >>> the CamelCase used in ‘DictReader’. But maybe that’s just an attempt at >>> foolish consistency :). >>> >>> best, >>> —titus >>> >>> _______________________________________________ >>> Python-ideas mailing list -- python-ideas@python.org >>> To unsubscribe send an email to python-ideas-le...@python.org >>> https://mail.python.org/mailman3/lists/python-ideas.python.org/ >>> Message archived at >>> https://mail.python.org/archives/list/python-ideas@python.org/message/EKHYCTYMXZG3VI4JYFA3Y3LD3ZNMI3IX/ >>> Code of Conduct: http://python.org/psf/codeofconduct/ >>> >>> >>> _______________________________________________ >>> Python-ideas mailing list -- python-ideas@python.org >>> To unsubscribe send an email to python-ideas-le...@python.org >>> https://mail.python.org/mailman3/lists/python-ideas.python.org/ >>> Message archived at >>> https://mail.python.org/archives/list/python-ideas@python.org/message/ZJNJQFC2LKQ76GTEBQNKTB3WO2POTKEN/ >>> Code of Conduct: http://python.org/psf/codeofconduct/ >>> >> -- >> Christopher Barker, PhD (Chris) >> >> Python Language Consulting >> - Teaching >> - Scientific Software Development >> - Desktop GUI and Web Development >> - wxPython, numpy, scipy, Cython >> _______________________________________________ >> Python-ideas mailing list -- python-ideas@python.org >> To unsubscribe send an email to python-ideas-le...@python.org >> https://mail.python.org/mailman3/lists/python-ideas.python.org/ >> Message archived at >> https://mail.python.org/archives/list/python-ideas@python.org/message/GAPBNBGLOWD27FCTJJV7FEPUZRKUE6FL/ >> Code of Conduct: http://python.org/psf/codeofconduct/ >> > -- Christopher Barker, PhD (Chris) Python Language Consulting - Teaching - Scientific Software Development - Desktop GUI and Web Development - wxPython, numpy, scipy, Cython
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