Python multi-threaded crawling reptiles _ real examples piece of embarrassments Encyclopedia

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a multi-threaded crawler: that certain block of the program is executed in parallel,

Reasonable to set up multiple threads to have higher efficiency reptiles

Embarrassments Encyclopedia scripts ordinary reptile reptiles and multithreading

The URL link analysis results:

https://www.qiushibaike.com/8hr/page/ Page /

Multithreading reptiles and also multi-threaded JAVA almost directly on the code

'''
#此处代码为普通爬虫
import urllib.request
import urllib.error
import re
headers = ("User-Agent","Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36")
opener = urllib.request.build_opener()
opener.addheaders = [headers]
urllib.request.install_opener(opener)
for i in range(1,2):
 url = "https://www.qiushibaike.com/8hr/page/"+str(i)+"/"
 pagedata = urllib.request.urlopen(url).read().decode("utf-8","ignore")
 pattern = '<div class="content">.*?<span>(.*?)</span>(.*?)</div>'
 datalist = re.compile(pattern,re.S).findall(pagedata)
 for j in range(0,len(datalist)):
  print("第"+str(i)+"页第"+str(j)+"个段子内容是：")
  print(datalist[j])
'''
'''
#此处为多线程介绍代码
import threading #导入多线程包
class A(threading.Thread): #创建一个多线程A
 def __init__(self):  #必须包含的两个方法之一:初始化线程
  threading.Thread.__init__(self)
 def run(self):   #必须包含的两个方法之一：线程运行方法
  for i in range(0,11):
   print("我是线程A")
class B(threading.Thread): #创建一个多线程A
 def __init__(self):  #必须包含的两个方法之一:初始化线程
  threading.Thread.__init__(self)
 def run(self):   #必须包含的两个方法之一：线程运行方法
  for i in range(0,11):
   print("我是线程B")
t1 = A() #线程实例化
t1.start() #线程运行
t2 = B()
t2.start()
'''
 
#此处为修改后的多线程爬虫
#使用多线程进行奇偶页的爬取
import urllib.request
import urllib.error
import re
import threading
headers = ("User-Agent","Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36")
opener = urllib.request.build_opener()
opener.addheaders = [headers]
urllib.request.install_opener(opener)
class one(threading.Thread): #爬取奇数页内容
 def __init__(self):
  threading.Thread.__init__(self)
 def run(self):
  for i in range(1,12,2):
   url = "https://www.qiushibaike.com/8hr/page/"+str(i)+"/"
   pagedata = urllib.request.urlopen(url).read().decode("utf-8","ignore")
   pattern = '<div class="content">.*?<span>(.*?)</span>(.*?)</div>'
   datalist = re.compile(pattern,re.S).findall(pagedata)
   for j in range(0,len(datalist)):
    print("第"+str(i)+"页第"+str(j)+"段子内容为：")
    print(datalist[j])
 
class two(threading.Thread): #爬取奇数页内容
 def __init__(self):
  threading.Thread.__init__(self)
 def run(self):
  for i in range(2,12,2):
   url = "https://www.qiushibaike.com/8hr/page/"+str(i)+"/"
   pagedata = urllib.request.urlopen(url).read().decode("utf-8","ignore")
   pattern = '<div class="content">.*?<span>(.*?)</span>(.*?)</div>'
   datalist = re.compile(pattern,re.S).findall(pagedata)
   for j in range(0,len(datalist)):
    print("第"+str(i)+"页第"+str(j)+"段子内容为：")
    print(datalist[j])
t1 = one()
t2 = two()
t1.start()
t2.start()

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