Demo关键技术

#!/usr/bin/env python
# A higher-level way
import dns.resolver
import time
resolver = dns.resolver.Resolver(configure=False)
resolver.nameservers = ['8.8.8.8']
time_start=time.time()
for i in range(50):
    answer = resolver.query(str(i)+'ip.taobao.com', 'A')
time_end=time.time()
print('The nameservers are:')
for rr in answer:
    print(rr)
print('totally cost',time_end-time_start)

#!/usr/bin/env python
# A higher-level way
import dns.resolver
import time
resolver = dns.resolver.Resolver(configure=False)
resolver.nameservers = ['223.5.5.5']
time_start=time.time()
all = 500
fp = open("subresult.txt","a")
rp = open("domains.txt","r")
for line in rp.readlines():
    try:
        sdomain = line.strip()
        answer = resolver.query(sdomain,"A")
        #print('The nameservers are:')
        for rr in answer:
            print(sdomain + " --- " + str(rr))
            fp.write(sdomain + " --- " + str(rr) + "\n")
    except:
        print("Error when" + sdomain)
fp.close()
rp.close()
time_end=time.time()
print("totally cost : " ,time_end-time_start)
#print('totally cost' + str(all) ,time_end-time_start)

工程化设计