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爬虫的多线程爬出网页的URL

醉东枫 2022-04-27 阅读 30
python爬虫

代码

import urllib.request
import time
import queue
from threading import Thread
import threading
url = "https://www.pythontab.com/html/pythonjichu/"(可以根据自己的实际情况选取url)
#构建队列
queue = queue.Queue()
queue.put(url)
for i in range(2,10):
    new_url = url+str(i)+'.html'
    queue.put(new_url)
#获取url,多线程获取url
def fetchurl(urlQueue):
    while True:
        try:
            urlQueue.get_nowait()
            number = urlQueue.qsize()
            print(number)
        except Exception as e:
            break
        print('当前的url是:','url')
        print('当前线性{}获取的url是:{}'.format(threading.currentThread().name,url))
        try:
            #获取url
            response = urllib.request.urlopen(url)
            status_code = response.getcode()
            if status_code == 200:
                time.sleep(0.5)
        except Exception as e:
            continue
stat_time = time.time()
#准备线程列表
threads = []
thread_num = 10(线程的个数)
for i in range(thread_num):
    thread = Thread(target=fetchurl,args=(queue,))
    threads.append(thread)
for t in threads:
    t.start()
for t in threads:
    t.join()
end_time = time.time()
print('消耗的时间是:',end_time-stat_time)

爬出结果展示

在这里插入图片描述

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