Don't import sympy in isympy
Don't import sympy in isympy

This fixes issue 3949.

asm666/sympy,kaichogami/sympy,ahhda/sympy,Gadal/sympy,jerli/sympy,debugger22/sympy,yashsharan/sympy,sahilshekhawat/sympy,aktech/sympy,atreyv/sympy,grevutiu-gabriel/sympy,mcdaniel67/sympy,jamesblunt/sympy,wyom/sympy,vipulroxx/sympy,Vishluck/sympy,ahhda/sympy,chaffra/sympy,kumarkrishna/sympy,Arafatk/sympy,emon10005/sympy,pandeyadarsh/sympy,wanglongqi/sympy,asm666/sympy,asm666/sympy,Shaswat27/sympy,farhaanbukhsh/sympy,dqnykamp/sympy,madan96/sympy,debugger22/sympy,toolforger/sympy,Vishluck/sympy,dqnykamp/sympy,moble/sympy,souravsingh/sympy,kumarkrishna/sympy,kaichogami/sympy,postvakje/sympy,Vishluck/sympy,pbrady/sympy,mafiya69/sympy,kaichogami/sympy,hargup/sympy,skidzo/sympy,Arafatk/sympy,yukoba/sympy,Shaswat27/sympy,drufat/sympy,saurabhjn76/sympy,dqnykamp/sympy,VaibhavAgarwalVA/sympy,ChristinaZografou/sympy,kaushik94/sympy,madan96/sympy,jaimahajan1997/sympy,meghana1995/sympy,AunShiLord/sympy,ga7g08/sympy,MridulS/sympy,liangjiaxing/sympy,atreyv/sympy,AunShiLord/sympy,vipulroxx/sympy,Curious72/sympy,atsao72/sympy,aktech/sympy,beni55/sympy,cswiercz/sympy,abloomston/sympy,diofant/diofant,kaushik94/sympy,yashsharan/sympy,garvitr/sympy,iamutkarshtiwari/sympy,Sumith1896/sympy,sunny94/temp,AunShiLord/sympy,rahuldan/sympy,sunny94/temp,abhiii5459/sympy,drufat/sympy,kevalds51/sympy,maniteja123/sympy,sunny94/temp,Designist/sympy,yashsharan/sympy,kaushik94/sympy,Davidjohnwilson/sympy,maniteja123/sympy,mcdaniel67/sympy,aktech/sympy,souravsingh/sympy,Davidjohnwilson/sympy,lindsayad/sympy,Curious72/sympy,hargup/sympy,iamutkarshtiwari/sympy,meghana1995/sympy,sampadsaha5/sympy,AkademieOlympia/sympy,MridulS/sympy,Designist/sympy,shikil/sympy,Curious72/sympy,hrashk/sympy,pbrady/sympy,farhaanbukhsh/sympy,skidzo/sympy,moble/sympy,beni55/sympy,cswiercz/sympy,wanglongqi/sympy,cswiercz/sympy,Sumith1896/sympy,VaibhavAgarwalVA/sympy,maniteja123/sympy,bukzor/sympy,shipci/sympy,hrashk/sympy,hargup/sympy,MridulS/sympy,sampadsaha5/sympy,jaimahajan1997/sympy,oliverlee/sympy,chaffra/sympy,lindsayad/sympy,ChristinaZografou/sympy,Mitchkoens/sympy,sahmed95/sympy,yukoba/sympy,AkademieOlympia/sympy,jamesblunt/sympy,skidzo/sympy,abhiii5459/sympy,AkademieOlympia/sympy,bukzor/sympy,Shaswat27/sympy,liangjiaxing/sympy,postvakje/sympy,Titan-C/sympy,shipci/sympy,toolforger/sympy,sahmed95/sympy,jamesblunt/sympy,atreyv/sympy,lidavidm/sympy,sahilshekhawat/sympy,kmacinnis/sympy,rahuldan/sympy,Gadal/sympy,jbbskinny/sympy,VaibhavAgarwalVA/sympy,jerli/sympy,chaffra/sympy,wanglongqi/sympy,Arafatk/sympy,lidavidm/sympy,sahilshekhawat/sympy,Mitchkoens/sympy,liangjiaxing/sympy,pandeyadarsh/sympy,saurabhjn76/sympy,iamutkarshtiwari/sympy,wyom/sympy,grevutiu-gabriel/sympy,rahuldan/sympy,emon10005/sympy,ahhda/sympy,Sumith1896/sympy,abhiii5459/sympy,atsao72/sympy,garvitr/sympy,mcdaniel67/sympy,lindsayad/sympy,kmacinnis/sympy,jaimahajan1997/sympy,bukzor/sympy,ga7g08/sympy,atsao72/sympy,hrashk/sympy,kumarkrishna/sympy,oliverlee/sympy,lidavidm/sympy,moble/sympy,Titan-C/sympy,shipci/sympy,Davidjohnwilson/sympy,pbrady/sympy,drufat/sympy,MechCoder/sympy,shikil/sympy,jerli/sympy,debugger22/sympy,Mitchkoens/sympy,kmacinnis/sympy,saurabhjn76/sympy,MechCoder/sympy,Titan-C/sympy,beni55/sympy,farhaanbukhsh/sympy,pandeyadarsh/sympy,souravsingh/sympy,skirpichev/omg,ChristinaZografou/sympy,cccfran/sympy,Gadal/sympy,mafiya69/sympy,grevutiu-gabriel/sympy,jbbskinny/sympy,sahmed95/sympy,vipulroxx/sympy,cccfran/sympy,cccfran/sympy,jbbskinny/sympy,toolforger/sympy,abloomston/sympy,kevalds51/sympy,mafiya69/sympy,wyom/sympy,yukoba/sympy,kevalds51/sympy,meghana1995/sympy,shikil/sympy,postvakje/sympy,ga7g08/sympy,Designist/sympy,MechCoder/sympy,emon10005/sympy,sampadsaha5/sympy,madan96/sympy,oliverlee/sympy,garvitr/sympy,abloomston/sympy