如果我想在考试中使用逗号作为分数的小数分隔符，我通常会使用@clemens 在评论中提出的解决方案这里如下例所示。
但是自从我更新到 texlive 2017 后它就不再起作用了，这尤其破坏了很多旧文档。
那么，对此有新的解决方案吗（然后我可以在旧文档中进行查询替换）？
\documentclass{article}
\usepackage{icomma}
\usepackage[locale=DE]{siunitx}
\usepackage{exsheets}
\usepackage{tasks}
\ExplSyntaxOn \cs_set_protected:Npn \exsheets_num:n #1 { \num {#1} } \ExplSyntaxOff
\begin{document}
\begin{question}{2.5}
This is a question.
\end{question}
\end{document}
错误信息是：
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ./test_exam.tex:16:
!siunitx error: "invalid-token-in-number" Invalid token '\s ' in
!numerical input. See the siunitx documentation for further
!information. For immediate help type H <return>.
!...............................................
l.16 \end{question}
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ./test_exam.tex:16:
!siunitx error: "invalid-number" Invalid numerical input '\s__fp
!\__fp_chk:w 10{1}{2500}{0000}{0000}{0000};'. See the siunitx
!documentation for further information. For immediate help type H
!<return>. ...............................................
l.16 \end{question}
\listfiles结果是
*File List*
article.cls 2014/09/29 v1.4h Standard LaTeX document class
size10.clo 2014/09/29 v1.4h Standard LaTeX file (size option)
icomma.sty 2002/03/10 v2.0 (WaS)
siunitx.sty 2017/08/02 v2.7j A comprehensive (SI) units package
expl3.sty 2017/09/18 L3 programming layer (loader)
expl3-code.tex 2017/09/18 L3 programming layer
l3pdfmode.def 2017/03/18 v L3 Experimental driver: PDF mode
xparse.sty 2017/09/18 L3 Experimental document command parser
amstext.sty 2000/06/29 v2.01 AMS text
amsgen.sty 1999/11/30 v2.0 generic functions
array.sty 2016/10/06 v2.4d Tabular extension package (FMi)
l3keys2e.sty 2017/09/18 LaTeX2e option processing using LaTeX3 keys
translator.sty 2010/06/12 ver 1.10
keyval.sty 2014/10/28 v1.15 key=value parser (DPC)
translator-language-mappings.tex
exsheets.sty 2017/02/08 v0.21i Yet another package for the creation of exercise sheets and exams.
xtemplate.sty 2017/09/18 L3 Experimental prototype document functions
etoolbox.sty 2017/01/02 v2.4 e-TeX tools for LaTeX (JAW)
environ.sty 2014/05/04 v0.3 A new way to define environments
trimspaces.sty 2009/09/17 v1.1 Trim spaces around a token list
pgfcore.sty 2010/04/11 v3.0.1a (rcs-revision 1.7)
graphicx.sty 2017/06/01 v1.1a Enhanced LaTeX Graphics (DPC,SPQR)
graphics.sty 2017/06/25 v1.2c Standard LaTeX Graphics (DPC,SPQR)
trig.sty 2016/01/03 v1.10 sin cos tan (DPC)
graphics.cfg 2016/06/04 v1.11 sample graphics configuration
pdftex.def 2017/06/24 v1.0g Graphics/color driver for pdftex
pgfsys.sty 2014/07/09 v3.0.1a (rcs-revision 1.48)
pgfrcs.sty 2015/08/07 v3.0.1a (rcs-revision 1.31)
everyshi.sty 2001/05/15 v3.00 EveryShipout Package (MS)
pgfrcs.code.tex
pgfsys.code.tex
pgfsyssoftpath.code.tex 2013/09/09 (rcs-revision 1.9)
pgfsysprotocol.code.tex 2006/10/16 (rcs-revision 1.4)
xcolor.sty 2016/05/11 v2.12 LaTeX color extensions (UK)
color.cfg 2016/01/02 v1.6 sample color configuration
pgfcore.code.tex
cntformats.sty 2014/07/20 v0.7 A different way to read counters. (CN)
cnltx-base.sty 2015/08/17 v0.13 LaTeX tools and documenting facilities (CN)
pgfopts.sty 2014/07/10 v2.1a LaTeX package options with pgfkeys
pgfkeys.sty
pgfkeys.code.tex
ltxcmds.sty 2016/05/16 v1.23 LaTeX kernel commands for general use (HO)
pdftexcmds.sty 2017/03/19 v0.25 Utility functions of pdfTeX for LuaTeX (HO)
infwarerr.sty 2016/05/16 v1.4 Providing info/warning/error messages (HO)
ifluatex.sty 2016/05/16 v1.4 Provides the ifluatex switch (HO)
ifpdf.sty 2017/03/15 v3.2 Provides the ifpdf switch
exsheets_headings.def 2017/02/08 v0.21i ExSheets headings object
exsheets_headings.cfg 2017/02/08 v0.21i ExSheets headings instances
tasks.sty 2016/08/13 v0.12 Horizontalcolumnedlists (CN)
epic.sty
tasks.cfg 2016/08/13 v0.12 tasks instances
ulem.sty 2012/05/18
translations.sty 2017/08/31 v1.7a internationalization of LaTeX2e packages (CN)
scrlfile.sty 2017/09/07 v3.24 KOMA-Script package (loading files)
translator-basic-dictionary-English.dict
siunitx-abbreviations.cfg 2017/08/02 v2.7j siunitx: Abbreviated units
supp-pdf.mkii
epstopdf-base.sty 2016/05/15 v2.6 Base part for package epstopdf
grfext.sty 2016/05/16 v1.2 Manage graphics extensions (HO)
kvdefinekeys.sty 2016/05/16 v1.4 Define keys (HO)
kvoptions.sty 2016/05/16 v3.12 Key value format for package options (HO)
kvsetkeys.sty 2016/05/16 v1.17 Key value parser (HO)
etexcmds.sty 2016/05/16 v1.6 Avoid name clashes with e-TeX commands (HO)
epstopdf-sys.cfg 2010/07/13 v1.3 Configuration of (r)epstopdf for TeX Live
translations-basic-dictionary-english.trsl (english translation file `translations-basic-dictionary')
exsheets_configurations.cfg
***********
答案1
添加\fp_eval:n；显然，exsheets传递一个浮点数给\exsheets_num:n并且这必须被“规范化”。
\documentclass{article}
\usepackage[locale=DE]{siunitx}
\usepackage{exsheets}
\usepackage{tasks}
\ExplSyntaxOn
\cs_set_protected:Npn \exsheets_num:n #1
{
\num{\fp_eval:n{#1}}
}
\ExplSyntaxOff
\begin{document}
\begin{question}{2.5}
This is a question.
\end{question}
\end{document}
