cache: utilities to print and clear it  (#656)
cache: utilities to print and clear it  (#656)

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