Multithreaded subdomain bruteforce tool

sub_brute.py

#python sub_brute.py example.com[domain] 10[thread]
#Coder:- Anirban Singha
import threading
import urllib2,sys
domain=sys.argv[1]
mythread=int(sys.argv[2])
def bruteforce_subdomain(domain,result,mylist):
    for line in mylist:
        try:
            url='https://'+line+'.'+domain
            r=urllib2.urlopen(url).getcode()
            if r == 200:
                print ('[+] '+url)
                result.append(url)
        except urllib2.URLError:
            pass
        except InvalidURL:
            print ('[-] '+url+' -----> invalid url')
            pass
print ('Starting Engline.....')
keyword = []
c=0
with open('vestige.txt') as l:
    for line in l:
        keyword.append(line)
        c+=1
x=[]
k=0
wlc=c//mythread
print ('Warming Up Engine...')
for i in range(mythread):
    x.append([])
    for line in keyword:
        x[i].append(line.strip())
        k=k+1
        if k == wlc:
            k = 0
            del keyword[:wlc]
            break
result = []
print ('Finish making wordlist.')
for xy in range(mythread):
    t=threading.Thread(target=bruteforce_subdomain,args=(domain,result,x[xy],))
    t.start()
t.join()
z=open('bruteforce_subdomain.txt','w')
for line in result:
    z.write(line.strip()+'\n')
z.close()