Ok, I'll try tonight. El miércoles, 3 de julio de 2013 18:57:21 UTC+2, Ondřej Čertík escribió: > > Hi Pablo, > > sorry for my shortcut. :) PR = pull request, here is how it works: > > https://help.github.com/articles/using-pull-requests > > yes we use git and github. Start by: > > git clone https://github.com/sympy/sympy > > and try to follow the help article. Please ask if you get stuck. > > Using git and github is a great way to do development, you can use it > for any other project as well, not just sympy. > > Ondrej > > On Wed, Jul 3, 2013 at 10:54 AM, peibol <pab...@gmail.com <javascript:>> > wrote: > > Sure. Call me stupid, but what's a PR? I'll need some help with the > > procedure. > > > > Are you using GIT or what? > > > > > > El miércoles, 3 de julio de 2013 18:18:02 UTC+2, Ondřej Čertík escribió: > >> > >> Excellent. > >> > >> Pablo, can you please send a PR with this? We'll then improve it there > >> and I can help with setting up the tests. Please ask if you get stuck. > >> > >> Ondrej > >> > >> On Wed, Jul 3, 2013 at 9:49 AM, Aaron Meurer <asme...@gmail.com> > wrote: > >> > Yes, definitely. Eventually, I would like to have a nice framework to > >> > make parsing things like this easier and have a nicer, more > extensible > >> > API, but for now, I think even simple parsers like this are better > >> > than nothing. > >> > > >> > Aaron Meurer > >> > > >> > On Wed, Jul 3, 2013 at 10:48 AM, Ondřej Čertík <ondrej...@gmail.com> > >> > wrote: > >> >> Pablo, > >> >> > >> >> On Wed, Jul 3, 2013 at 5:38 AM, peibol <pab...@gmail.com> wrote: > >> >>> It will be something like that. For the moment, I'm just > implemented > >> >>> the > >> >>> basics of presentation mathml. I will add features as I need them. > >> >>> > >> >>> After running it, sympify should be called. What do you think about > >> >>> it? > >> >>> > >> >>> def parseMML(mmlinput): > >> >>> from lxml import etree > >> >>> from StringIO import * > >> >>> from lxml import objectify > >> >>> mmlinput= mmlinput.replace(' xmlns="', ' xmlnamespace="') > >> >>> parser = > >> >>> etree.XMLParser(ns_clean=True,remove_pis=True,remove_comments=True) > >> >>> tree = etree.parse(StringIO(mmlinput), parser) > >> >>> > >> >>> > objectify.deannotate(tree,cleanup_namespaces=True,xsi=True,xsi_nil=True) > >> >>> mmlinput=etree.tostring(tree.getroot()) > >> >>> exppy="" #this is the python expression > >> >>> symvars=[] #these are symbolic variables which can eventually take > >> >>> part in > >> >>> the expression > >> >>> events = ("start", "end") > >> >>> level = 0 > >> >>> context = etree.iterparse(StringIO(mmlinput),events=events) > >> >>> for action, elem in context: > >> >>> if (action=='start') and (elem.tag=='mfrac'): > >> >>> level += 1 > >> >>> mmlaux=etree.tostring(elem[0]) > >> >>> (a,b)=parseMML(mmlaux) > >> >>> symvars.append(b) > >> >>> exppy+=a > >> >>> exppy+='/' > >> >>> mmlaux=etree.tostring(elem[1]) > >> >>> (a,b)=parseMML(mmlaux) > >> >>> symvars.append(b) > >> >>> exppy+=a > >> >>> if (action=='end') and (elem.tag=='mfrac'): > >> >>> level -= 1 > >> >>> if level: > >> >>> continue > >> >>> if (action=='start') and (elem.tag=='mrow'): > >> >>> exppy+='(' > >> >>> if (action=='end') and (elem.tag=='mrow'): > >> >>> exppy+=')' > >> >>> if action=='start' and elem.tag=='mn': #this is a number > >> >>> exppy+=elem.text > >> >>> if action=='start' and elem.tag=='mi': #this is a variable > >> >>> exppy+=elem.text > >> >>> symvars.append(elem.text) #we'll return the variable, so sympy can > >> >>> sympify > >> >>> it afterwards > >> >>> if action=='start' and elem.tag=='mo': #this is a operation > >> >>> exppy+=elem.text > >> >>> return (exppy, symvars) > >> >>> > >> >>> > >> >>> With the example: mmlinput='''<?xml version="1.0"?> <math > >> >>> xmlns="http://www.w3.org/1998/Math/MathML"; > >> >>> xmlns:mml="http://www.w3.org/1998/Math/MathML"; > >> >>> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; > >> >>> xsi:schemaLocation="http://www.w3.org/1998/Math/MathML > >> >>> http://www.w3.org/Math/XMLSchema/mathml2/mathml2.xsd";> <mrow> > <mfrac> > >> >>> <mrow> > >> >>> <mn>3</mn> </mrow> <mrow> <mn>57</mn> </mrow> </mfrac> </mrow> > >> >>> </math>''' > >> >>> > >> >>> We get: > >> >>> exppy='((3)/(57))' > >> >> > >> >> > >> >> I think that's a great start. I assume you pass the expression to > >> >> sympify() and obtain a SymPy expression as a result. > >> >> > >> >> Aaron, I think we should have this in sympy, what do you think? We > can > >> >> install lxml in .travis.yml and have this tested. If so, I can help > >> >> you Pablo with sending a PR and get it setup. > >> >> > >> >> Ondrej > >> >> > >> >> -- > >> >> You received this message because you are subscribed to the Google > >> >> Groups "sympy" group. > >> >> To unsubscribe from this group and stop receiving emails from it, > send > >> >> an email to sympy+un...@googlegroups.com. > >> >> To post to this group, send email to sy...@googlegroups.com. > >> >> Visit this group at http://groups.google.com/group/sympy. > >> >> For more options, visit https://groups.google.com/groups/opt_out. > >> >> > >> >> > >> > > >> > -- > >> > You received this message because you are subscribed to the Google > >> > Groups "sympy" group. > >> > To unsubscribe from this group and stop receiving emails from it, > send > >> > an email to sympy+un...@googlegroups.com. > >> > To post to this group, send email to sy...@googlegroups.com. > >> > Visit this group at http://groups.google.com/group/sympy. > >> > For more options, visit https://groups.google.com/groups/opt_out. > >> > > >> > > > > > -- > > You received this message because you are subscribed to the Google > Groups > > "sympy" group. > > To unsubscribe from this group and stop receiving emails from it, send > an > > email to sympy+un...@googlegroups.com <javascript:>. > > To post to this group, send email to sy...@googlegroups.com<javascript:>. > > > Visit this group at http://groups.google.com/group/sympy. > > For more options, visit https://groups.google.com/groups/opt_out. > > > > >
-- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at http://groups.google.com/group/sympy. For more options, visit https://groups.google.com/groups/opt_out.
