def randomGraph(request):
   #Defaults for Generating random graphs
   random.seed()
   numnodes=5
   format="svg"
   size="2,2"
   mime="image/svg+xml"
 
 
   if "format" in request.GET:
       infor=request.GET["format"]
       if(infor=="png"):
           mime="image/png"
           format="png"
 
       elif(infor=="gif"):
           mime="image/gif"
           format="gif"
 
   if "size" in request.GET:
       size=request.GET["size"]
 
 
   if "numnodes" in request.GET:
       numnodes=int(request.GET["numnodes"])
 
 
   dot="""digraph G{
       size ="%s";
       orientation=portrait;
       {{{dot}}}
   }""" % (size)
 
   nodes=[]
   shapes=['ellipse','box','circle','record','triangle','doublecircle']
   styles=['bold','dotted','normal']
   colors=['cadetblue2','dimgray','dodgerblue1','beige','aliceblue','ghostwhite',
                   'greenyellow','hotpink4','lightgoldenrod2']
 
   st=""
   for i in range(numnodes):
       nodes.append("a"+str(i));
 
   for node in nodes:
       s1=random.randint(0,len(shapes)-1)
       c1=random.randint(0,len(colors)-1)
       st=st+" %s [shape=%s fillcolor=%s style=filled];\n" %(node,shapes[s1],colors[c1])
 
   for i in range(numnodes):
       r1=random.randint(0,numnodes-1)
       r2=random.randint(0,numnodes-1)
       s2=random.randint(0,len(styles)-1)
       st=st+nodes[r1]+"->"+nodes[r2]+" [style=%s];\n" %(styles[s2])
 
   dot=dot.replace("{{{dot}}}",st)
 
   tmpout, filename = mkstemp()
 
   pobj=Popen('dot -T%s -o %s' % (format,filename),shell=True,stdin=PIPE,stdout=PIPE)
 
   fin = pobj.stdin
   fout = pobj.stdout
   fin.write(dot)
   fin.flush()
   fin.close()
   pobj.wait()
 
   fout = os.fdopen(tmpout, 'r')
   jpeg = fout.read()
   fout.close()
 
   os.remove(filename)
 
   #jpeg=dot
 
   return HttpResponse(content=jpeg, mimetype='%s' % (mime))