[issue34311] locale.format() and locale.format_string() cast Decimals to float
James Emerton added the comment: It looks like a bot got a bit excited when I mentioned this issue in the PR for bpo-33731. I unlinked the PR but this issue still got flagged for review. -- ___ Python tracker <https://bugs.python.org/issue34311> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue34311] locale.format() and locale.format_string() cast Decimals to float
Change by James Emerton : -- pull_requests: -8166 ___ Python tracker <https://bugs.python.org/issue34311> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue34311] locale.format() and locale.format_string() cast Decimals to float
Change by James Emerton : -- keywords: +patch pull_requests: +8166 stage: -> patch review ___ Python tracker <https://bugs.python.org/issue34311> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue33731] string formatting that produces floats with preset precision while respecting locale
James Emerton added the comment: @rhettinger See #34311 about formatting Decimals using locale.format(). I'd like to see the problem fixed in one place or the other. Also, this is seems relatively straightforward to implement as it's really just a combination of the fixed precision 'f' and the locale specific 'n' format types. -- ___ Python tracker <https://bugs.python.org/issue33731> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue33731] string formatting that produces floats with preset precision while respecting locale
James Emerton added the comment: So far, I've implemented this for Decimal -- ___ Python tracker <https://bugs.python.org/issue33731> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue33731] string formatting that produces floats with preset precision while respecting locale
Change by James Emerton : -- nosy: +jemerton ___ Python tracker <https://bugs.python.org/issue33731> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue34311] locale.format() and locale.format_string() cast Decimals to float
James Emerton added the comment: Certainly adding another letter to the format spec would solve my issue and would in fact be somewhat preferable to using local.format directly. I think this could be fixed in the locale module by transforming the format spec and using new-style formatting, but I'm not familiar enough with the corner cases to know if its practical to cover all the possible cases; particularly those coming from format_string(). -- ___ Python tracker <https://bugs.python.org/issue34311> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue34311] locale.format() and locale.format_string() cast Decimals to float
New submission from James Emerton :
We use locale.format('%.2f', x, True) to convert Decimal values to strings for
display. Unfortunately, the locale module is using %-formatting to generate the
initial string before applying locale specific formatting. As a result, any
value which cannot be accurately represented as a float will produce incorrect
results.
I've built some formatting that uses new-style string formatting (and some
internal locale functions) which corrects the problem.
Unfortunately, making this change in the locale module would require converting
the input format string to the new syntax, so '%.2f' would become '{:.2f}'.
See also #33731
--
components: Library (Lib)
messages: 322885
nosy: jemerton
priority: normal
severity: normal
status: open
title: locale.format() and locale.format_string() cast Decimals to float
versions: Python 3.6, Python 3.7, Python 3.8
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[issue1677872] Efficient reverse line iterator
James Emerton added the comment: Attached is an implementation of BufferedReader.readprevline(), as suggested by Antoine. At this point, it seems to be working but I would like to improve the tests when a single result spans multiple chunks. I would particularly like to ensure correct behaviour when a newline ends up as the last byte of a new chunk. -- nosy: +jemerton Added file: http://bugs.python.org/file34894/readprevline-20140415.diff ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue1677872 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
