On Tue, Mar 4, 2014 at 6:37 PM, Ambar Mehrotra <ambar.pri...@gmail.com> wrote: > @Tim > > Even in python an integer is automatically converted to long type but it > cannot go further. And as sympy has a numbers class for other data types as
You might be misunderstanding how Python integers work. Your BigInteger class is just Python int. E.g., in pure Python: >>> 2**100 1267650600228229401496703205376L >>> 2**1000 10715086071862673209484250490600018105614048117055336074437503883703510511249361224931983788156958581275946729175531468251871452856923140435984577574698574803934567774824230985421074605062371141877954182153046474983581941267398767559165543946077062914571196477686542167660429831652624386837205668069376L >>> 2**10000 19950631168807583848837421626835850838234968318861924548520089498529438830221946631919961684036194597899331129423209124271556491349413781117593785932096323957855730046793794526765246551266059895520550086918193311542508608460618104685509074866089624888090489894838009253941633257850621568309473902556912388065225096643874441046759871626985453222868538161694315775629640762836880760732228535091641476183956381458969463899410840960536267821064621427333394036525565649530603142680234969400335934316651459297773279665775606172582031407994198179607378245683762280037302885487251900834464581454650557929601414833921615734588139257095379769119277800826957735674444123062018757836325502728323789270710373802866393031428133241401624195671690574061419654342324638801248856147305207431992259611796250130992860241708340807605932320161268492288496255841312844061536738951487114256315111089745514203313820202931640957596464756010405845841566072044962867016515061920631004186422275908670900574606417856951911456055068251250406007519842261898059237118054444788072906395242548339221982707404473162376760846613033778706039803413197133493654622700563169937455508241780972810983291314403571877524768509857276937926433221599399876886660808368837838027643282775172273657572744784112294389733810861607423253291974813120197604178281965697475898164531258434135959862784130128185406283476649088690521047580882615823961985770122407044330583075869039319604603404973156583208672105913300903752823415539745394397715257455290510212310947321610753474825740775273986348298498340756937955646638621874569499279016572103701364433135817214311791398222983845847334440270964182851005072927748364550578634501100852987812389473928699540834346158807043959118985815145779177143619698728131459483783202081474982171858011389071228250905826817436220577475921417653715687725614904582904992461028630081535583308130101987675856234343538955409175623400844887526162643568648833519463720377293240094456246923254350400678027273837755376406726898636241037491410966718557050759098100246789880178271925953381282421954028302759408448955014676668389697996886241636313376393903373455801407636741877711055384225739499110186468219696581651485130494222369947714763069155468217682876200362777257723781365331611196811280792669481887201298643660768551639860534602297871557517947385246369446923087894265948217008051120322365496288169035739121368338393591756418733850510970271613915439590991598154654417336311656936031122249937969999226781732358023111862644575299135758175008199839236284615249881088960232244362173771618086357015468484058622329792853875623486556440536962622018963571028812361567512543338303270029097668650568557157505516727518899194129711337690149916181315171544007728650573189557450920330185304847113818315407324053319038462084036421763703911550639789000742853672196280903477974533320468368795868580237952218629120080742819551317948157624448298518461509704888027274721574688131594750409732115080498190455803416826949787141316063210686391511681774304792596709376L etc. Yes, Python ints are not as optimized as GMP for large integers, but it shouldn't run out of memory or have other issues. It is just slower, though usually fast enough for most applications. If this speed really matters to you, then use gmpy with sympy and you are all set. Ondrej > well this can also be included. Wanted to build something similar to this > http://docs.oracle.com/javase/7/docs/api/java/math/BigInteger.html. > > On Wednesday, 5 March 2014 06:38:47 UTC+5:30, Ondřej Čertík wrote: >> >> On Tue, Mar 4, 2014 at 4:59 PM, Ambar Mehrotra <ambar....@gmail.com> >> wrote: >> > Hi, >> > >> > I am Ambar Mehrotra and undergraduate from BITS Pilani, India pursuing >> > Information Systems. >> > I like to play with numbers and have a descent experience with python. >> > >> > I would like to suggest the addition of a 'BigInteger' module in the >> > sympy.core.numbers class. >> > Currently there is no convenient way of storing and working with very >> > large >> > numbers in python. I came across this problem while solving a question >> > of >> > Google Code Jam where python ran out of memory while doing a long >> > calculation. >> > I would like to take user input in form of a string and then use >> > algorithms >> > to do some basic math operations using numpy to make things faster. >> > >> > Please tell me if this idea is worth considering and guide me further if >> > you >> > like it. >> >> SymPy can also use GMP through gmpy through mpmath, so that should be >> able to handle any large integers. >> >> Can you post your code where you need large integers in Python that >> runs out of memory? >> >> Ondrej >> >> > >> > with regards, >> > Ambar Mehrotra. >> > >> > -- >> > 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. >> > To view this discussion on the web visit >> > >> > https://groups.google.com/d/msgid/sympy/7ec24c8c-02d0-4e02-afb4-ca35a75207f5%40googlegroups.com. >> > 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. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sympy/7312fed9-2752-4de0-a9c1-9ddbd8b08767%40googlegroups.com. > > 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. 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