Don't compare to None, use "is None" instead.
Don't compare to None, use "is None" instead.

kevalds51/sympy,jerli/sympy,Designist/sympy,jaimahajan1997/sympy,VaibhavAgarwalVA/sympy,pandeyadarsh/sympy,iamutkarshtiwari/sympy,bukzor/sympy,kevalds51/sympy,cccfran/sympy,kaushik94/sympy,cswiercz/sympy,ahhda/sympy,yashsharan/sympy,chaffra/sympy,garvitr/sympy,Sumith1896/sympy,farhaanbukhsh/sympy,diofant/diofant,Vishluck/sympy,saurabhjn76/sympy,Davidjohnwilson/sympy,dqnykamp/sympy,ga7g08/sympy,grevutiu-gabriel/sympy,atreyv/sympy,chaffra/sympy,AkademieOlympia/sympy,sahmed95/sympy,moble/sympy,mafiya69/sympy,kaushik94/sympy,MridulS/sympy,yukoba/sympy,ahhda/sympy,vipulroxx/sympy,ga7g08/sympy,sunny94/temp,MechCoder/sympy,hargup/sympy,MridulS/sympy,Shaswat27/sympy,AunShiLord/sympy,sampadsaha5/sympy,rahuldan/sympy,jbbskinny/sympy,Shaswat27/sympy,Mitchkoens/sympy,saurabhjn76/sympy,wyom/sympy,shipci/sympy,yashsharan/sympy,pandeyadarsh/sympy,skidzo/sympy,souravsingh/sympy,Davidjohnwilson/sympy,VaibhavAgarwalVA/sympy,debugger22/sympy,pandeyadarsh/sympy,Vishluck/sympy,sahmed95/sympy,mafiya69/sympy,beni55/sympy,shikil/sympy,beni55/sympy,flacjacket/sympy,moble/sympy,Davidjohnwilson/sympy,skirpichev/omg,maniteja123/sympy,pbrady/sympy,garvitr/sympy,vipulroxx/sympy,postvakje/sympy,Designist/sympy,wyom/sympy,sahilshekhawat/sympy,kumarkrishna/sympy,maniteja123/sympy,srjoglekar246/sympy,AunShiLord/sympy,farhaanbukhsh/sympy,kumarkrishna/sympy,sunny94/temp,meghana1995/sympy,sahmed95/sympy,wanglongqi/sympy,Curious72/sympy,rahuldan/sympy,asm666/sympy,Sumith1896/sympy,yukoba/sympy,rahuldan/sympy,meghana1995/sympy,ga7g08/sympy,postvakje/sympy,madan96/sympy,beni55/sympy,meghana1995/sympy,grevutiu-gabriel/sympy,jerli/sympy,garvitr/sympy,Gadal/sympy,jaimahajan1997/sympy,Arafatk/sympy,hargup/sympy,hrashk/sympy,sunny94/temp,saurabhjn76/sympy,cswiercz/sympy,Curious72/sympy,lindsayad/sympy,MechCoder/sympy,souravsingh/sympy,aktech/sympy,abhiii5459/sympy,mafiya69/sympy,abloomston/sympy,kmacinnis/sympy,toolforger/sympy,liangjiaxing/sympy,iamutkarshtiwari/sympy,hrashk/sympy,cccfran/sympy,vipulroxx/sympy,bukzor/sympy,Curious72/sympy,Arafatk/sympy,drufat/sympy,abloomston/sympy,AkademieOlympia/sympy,Titan-C/sympy,AkademieOlympia/sympy,emon10005/sympy,sahilshekhawat/sympy,AunShiLord/sympy,amitjamadagni/sympy,lidavidm/sympy,kmacinnis/sympy,abloomston/sympy,abhiii5459/sympy,atsao72/sympy,chaffra/sympy,bukzor/sympy,Designist/sympy,hargup/sympy,jerli/sympy,ahhda/sympy,abhiii5459/sympy,skidzo/sympy,MechCoder/sympy,kaichogami/sympy,jamesblunt/sympy,sampadsaha5/sympy,atsao72/sympy,Arafatk/sympy,wyom/sympy,amitjamadagni/sympy,aktech/sympy,sahilshekhawat/sympy,Shaswat27/sympy,pbrady/sympy,skidzo/sympy,Titan-C/sympy,Gadal/sympy,shipci/sympy,postvakje/sympy,drufat/sympy,farhaanbukhsh/sympy,liangjiaxing/sympy,cccfran/sympy,maniteja123/sympy,lindsayad/sympy,shikil/sympy,shikil/sympy,toolforger/sympy,mcdaniel67/sympy,yashsharan/sympy,jbbskinny/sympy,asm666/sympy,Gadal/sympy,oliverlee/sympy,iamutkarshtiwari/sympy,asm666/sympy,dqnykamp/sympy,jaimahajan1997/sympy,debugger22/sympy,kmacinnis/sympy,oliverlee/sympy,madan96/sympy,jamesblunt/sympy,MridulS/sympy,madan96/sympy,toolforger/sympy,sampadsaha5/sympy,Vishluck/sympy,shipci/sympy,jamesblunt/sympy,liangjiaxing/sympy,kumarkrishna/sympy,yukoba/sympy,emon10005/sympy,atreyv/sympy,kaichogami/sympy,ChristinaZografou/sympy,mcdaniel67/sympy,ChristinaZografou/sympy,kaichogami/sympy,atreyv/sympy,oliverlee/sympy,souravsingh/sympy,atsao72/sympy,jbbskinny/sympy,dqnykamp/sympy,pbrady/sympy,wanglongqi/sympy,grevutiu-gabriel/sympy,debugger22/sympy,hrashk/sympy,lidavidm/sympy,emon10005/sympy,ChristinaZografou/sympy,mcdaniel67/sympy,drufat/sympy,moble/sympy,Mitchkoens/sympy,Sumith1896/sympy,kevalds51/sympy,Mitchkoens/sympy,cswiercz/sympy,wanglongqi/sympy,VaibhavAgarwalVA/sympy,lindsayad/sympy,lidavidm/sympy,aktech/sympy,kaushik94/sympy,Titan-C/sympy