Modified nltk stopwords taken from https://gist.github.com/sebleier/554280#gistcomment-3126707

gist_stopwords.txt

0o,0s,3a,3b,3d,6b,6o,a,a1,a2,a3,a4,ab,able,about,above,abst,ac,accordance,according,accordingly,across,act,actually,ad,added,adj,ae,af,affected,affecting,affects,after,afterwards,ag,again,against,ah,ain,ain't,aj,al,all,allow,allows,almost,alone,along,already,also,although,always,am,among,amongst,amoungst,amount,an,and,announce,another,any,anybody,anyhow,anymore,anyone,anything,anyway,anyways,anywhere,ao,ap,apart,apparently,appear,appreciate,appropriate,approximately,ar,are,aren,arent,aren't,arise,around,as,a's,aside,ask,asking,associated,at,au,auth,av,available,aw,away,awfully,ax,ay,az,b,b1,b2,b3,ba,back,bc,bd,be,became,because,become,becomes,becoming,been,before,beforehand,begin,beginning,beginnings,begins,behind,being,believe,below,beside,besides,best,better,between,beyond,bi,bill,biol,bj,bk,bl,bn,both,bottom,bp,br,brief,briefly,bs,bt,bu,but,bx,by,c,c1,c2,c3,ca,call,came,can,cannot,cant,can't,cause,causes,cc,cd,ce,certain,certainly,cf,cg,ch,changes,ci,cit,cj,cl,clearly,cm,c'mon,cn,co,com,come,comes,con,concerning,consequently,consider,considering,contain,containing,contains,corresponding,could,couldn,couldnt,couldn't,course,cp,cq,cr,cry,cs,c's,ct,cu,currently,cv,cx,cy,cz,d,d2,da,date,dc,dd,de,definitely,describe,described,despite,detail,df,di,did,didn,didn't,different,dj,dk,dl,do,does,doesn,doesn't,doing,don,done,don't,down,downwards,dp,dr,ds,dt,du,due,during,dx,dy,e,e2,e3,ea,each,ec,ed,edu,ee,ef,effect,eg,ei,eight,eighty,either,ej,el,eleven,else,elsewhere,em,empty,en,end,ending,enough,entirely,eo,ep,eq,er,es,especially,est,et,et-al,etc,eu,ev,even,ever,every,everybody,everyone,everything,everywhere,ex,exactly,example,except,ey,f,f2,fa,far,fc,few,ff,fi,fifteen,fifth,fify,fill,find,fire,first,five,fix,fj,fl,fn,fo,followed,following,follows,for,former,formerly,forth,forty,found,four,fr,from,front,fs,ft,fu,full,further,furthermore,fy,g,ga,gave,ge,get,gets,getting,gi,give,given,gives,giving,gj,gl,go,goes,going,gone,got,gotten,gr,greetings,gs,gy,h,h2,h3,had,hadn,hadn't,happens,hardly,has,hasn,hasnt,hasn't,have,haven,haven't,having,he,hed,he'd,he'll,hello,help,hence,her,here,hereafter,hereby,herein,heres,here's,hereupon,hers,herself,hes,he's,hh,hi,hid,him,himself,his,hither,hj,ho,home,hopefully,how,howbeit,however,how's,hr,hs,http,hu,hundred,hy,i,i2,i3,i4,i6,i7,i8,ia,ib,ibid,ic,id,i'd,ie,if,ig,ignored,ih,ii,ij,il,i'll,im,i'm,immediate,immediately,importance,important,in,inasmuch,inc,indeed,index,indicate,indicated,indicates,information,inner,insofar,instead,interest,into,invention,inward,io,ip,iq,ir,is,isn,isn't,it,itd,it'd,it'll,its,it's,itself,iv,i've,ix,iy,iz,j,jj,jr,js,jt,ju,just,k,ke,keep,keeps,kept,kg,kj,km,know,known,knows,ko,l,l2,la,largely,last,lately,later,latter,latterly,lb,lc,le,least,les,less,lest,let,lets,let's,lf,like,liked,likely,line,little,lj,ll,ll,ln,lo,look,looking,looks,los,lr,ls,lt,ltd,m,m2,ma,made,mainly,make,makes,many,may,maybe,me,mean,means,meantime,meanwhile,merely,mg,might,mightn,mightn't,mill,million,mine,miss,ml,mn,mo,more,moreover,most,mostly,move,mr,mrs,ms,mt,mu,much,mug,must,mustn,mustn't,my,myself,n,n2,na,name,namely,nay,nc,nd,ne,near,nearly,necessarily,necessary,need,needn,needn't,needs,neither,never,nevertheless,new,next,ng,ni,nine,ninety,nj,nl,nn,no,nobody,non,none,nonetheless,noone,nor,normally,nos,not,noted,nothing,novel,now,nowhere,nr,ns,nt,ny,o,oa,ob,obtain,obtained,obviously,oc,od,of,off,often,og,oh,oi,oj,ok,okay,ol,old,om,omitted,on,once,one,ones,only,onto,oo,op,oq,or,ord,os,ot,other,others,otherwise,ou,ought,our,ours,ourselves,out,outside,over,overall,ow,owing,own,ox,oz,p,p1,p2,p3,page,pagecount,pages,par,part,particular,particularly,pas,past,pc,pd,pe,per,perhaps,pf,ph,pi,pj,pk,pl,placed,please,plus,pm,pn,po,poorly,possible,possibly,potentially,pp,pq,pr,predominantly,present,presumably,previously,primarily,probably,promptly,proud,provides,ps,pt,pu,put,py,q,qj,qu,que,quickly,quite,qv,r,r2,ra,ran,rather,rc,rd,re,readily,really,reasonably,recent,recently,ref,refs,regarding,regardless,regards,related,relatively,research,research-articl,respectively,resulted,resulting,results,rf,rh,ri,right,rj,rl,rm,rn,ro,rq,rr,rs,rt,ru,run,rv,ry,s,s2,sa,said,same,saw,say,saying,says,sc,sd,se,sec,second,secondly,section,see,seeing,seem,seemed,seeming,seems,seen,self,selves,sensible,sent,serious,seriously,seven,several,sf,shall,shan,shan't,she,shed,she'd,she'll,shes,she's,should,shouldn,shouldn't,should've,show,showed,shown,showns,shows,si,side,significant,significantly,similar,similarly,since,sincere,six,sixty,sj,sl,slightly,sm,sn,so,some,somebody,somehow,someone,somethan,something,sometime,sometimes,somewhat,somewhere,soon,sorry,sp,specifically,specified,specify,specifying,sq,sr,ss,st,still,stop,strongly,sub,substantially,successfully,such,sufficiently,suggest,sup,sure,sy,system,sz,t,t1,t2,t3,take,taken,taking,tb,tc,td,te,tell,ten,tends,tf,th,than,thank,thanks,thanx,that,that'll,thats,that's,that've,the,their,theirs,them,themselves,then,thence,there,thereafter,thereby,thered,therefore,therein,there'll,thereof,therere,theres,there's,thereto,thereupon,there've,these,they,theyd,they'd,they'll,theyre,they're,they've,thickv,thin,think,third,this,thorough,thoroughly,those,thou,though,thoughh,thousand,three,throug,through,throughout,thru,thus,ti,til,tip,tj,tl,tm,tn,to,together,too,took,top,toward,towards,tp,tq,tr,tried,tries,truly,try,trying,ts,t's,tt,tv,twelve,twenty,twice,two,tx,u,u201d,ue,ui,uj,uk,um,un,under,unfortunately,unless,unlike,unlikely,until,unto,uo,up,upon,ups,ur,us,use,used,useful,usefully,usefulness,uses,using,usually,ut,v,va,value,various,vd,ve,ve,very,via,viz,vj,vo,vol,vols,volumtype,vq,vs,vt,vu,w,wa,want,wants,was,wasn,wasnt,wasn't,way,we,wed,we'd,welcome,well,we'll,well-b,went,were,we're,weren,werent,weren't,we've,what,whatever,what'll,whats,what's,when,whence,whenever,when's,where,whereafter,whereas,whereby,wherein,wheres,where's,whereupon,wherever,whether,which,while,whim,whither,who,whod,whoever,whole,who'll,whom,whomever,whos,who's,whose,why,why's,wi,widely,will,willing,wish,with,within,without,wo,won,wonder,wont,won't,words,world,would,wouldn,wouldnt,wouldn't,www,x,x1,x2,x3,xf,xi,xj,xk,xl,xn,xo,xs,xt,xv,xx,y,y2,yes,yet,yj,yl,you,youd,you'd,you'll,your,youre,you're,yours,yourself,yourselves,you've,yr,ys,yt,z,zero,zi,zz

You can easily load it into your NLP project and use this as a python list. Below are the steps to do so.

wget https://gist.githubusercontent.com/ZohebAbai/513218c3468130eacff6481f424e4e64/raw/b70776f341a148293ff277afa0d0302c8c38f7e2/gist_stopwords.txt

gist_file = open("gist_stopwords.txt", "r")
try:
    content = gist_file.read()
    stopwords = content.split(",")
finally:
    gist_file.close()