解析Python队列对象
我在思考代码中的问题所在解析Python队列对象,python,python-multithreading,Python,Python Multithreading,我在思考代码中的问题所在 from queue import Queue from threading import Thread from html.parser import HTMLParser import urllib.request hosts = ["http://yahoo.com", "http://google.com", "http://ibm.com"] queue = Queue() class ThreadUrl(Thread): def __init__
from queue import Queue
from threading import Thread
from html.parser import HTMLParser
import urllib.request
hosts = ["http://yahoo.com", "http://google.com", "http://ibm.com"]
queue = Queue()
class ThreadUrl(Thread):
def __init__(self, queue):
Thread.__init__(self)
self.queue = queue
def run(self):
while True:
host = self.queue.get()
url=urllib.request.urlopen(host)
url.read(4096)
self.queue.task_done()
class MyHTMLParser(HTMLParser):
def handle_starttag(self, tag, attrs):
print("Start tag:", tag)
for attr in attrs:
print(" attr:", attr)
def consumer():
for i in range(3):
t = ThreadUrl(queue)
t.setDaemon(True)
t.start()
for host in hosts:
parser = MyHTMLParser()
parser.feed(host)
queue.put(host)
queue.join()
consumer()
我的目标是提取URL的内容,读取队列并最终解析它。当我执行代码时,它不会打印任何内容。我应该将解析器放在哪里 以下是一个示例:
from queue import Queue
from threading import Thread
from html.parser import HTMLParser
import urllib.request
NUMBER_OF_THREADS = 3
HOSTS = ["http://yahoo.com", "http://google.com", "http://ibm.com"]
class MyHTMLParser(HTMLParser):
def handle_starttag(self, tag, attrs):
print("Start tag:", tag)
for attr in attrs:
print("\tattr:", attr)
class ThreadUrl(Thread):
def __init__(self, queue):
Thread.__init__(self)
self.queue = queue
def run(self):
while True:
host = self.queue.get()
url = urllib.request.urlopen(host)
content = str(url.read(4096))
parser = MyHTMLParser()
parser.feed( content )
self.queue.task_done()
def consumer():
queue = Queue()
for i in range(NUMBER_OF_THREADS):
thread = ThreadUrl(queue)
thread.setDaemon(True)
thread.start()
for host in HOSTS:
queue.put(host)
queue.join()
if __name__ == '__main__':
consumer()
parser.feedhost没有意义,您需要使用url.read4096返回的HTML调用feed方法。@lcastillov我现在明白了,但是我应该创建新类还是什么?在run方法中使用解析器,只需在队列中插入url即可。在ThreadUrl.run方法内创建MyHTMLParser类并处理传入的主机。