(11).scrapy依賴的模塊Twisted
阿新 • • 發佈：2018-07-03
acc 裝飾 port domain erro pad 三次 repl 得到
#!/usr/bin/env python
# -*- coding:utf-8 -*-
# author:love_cat
from twisted.internet import reactor # 事件循環（終止條件，所有的socket都已經移除）
from twisted.internet import defer # defer.Deferred 特殊的socket對象（不發請求，手動移除）
from twisted.web.client import getPage # 用於創建socket對象（下載完成，自動從事件循環中移除）
# 1. 利用getPage創建socket
# 2. 將socket添加到事件循環
# 3. 開始事件循環（內部發送請求，並接受響應；當所有的socket完成後，終止事件循環）
def response(content):
print(content.decode(‘utf-8‘))
@defer.inlineCallbacks
def task():
url = ‘http://www.bilibili.com‘
d = getPage(url.encode(‘utf-8‘)) # 加上裝飾器，得到特殊的socket對象。不發請求，只待在事件循環裏面，用於讓事件循環一直持續，直到我們手動移除
d.addCallback(response)
yield d
task()
reactor.run()
# 程序的輸出結果如下
‘‘‘
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‘‘‘
@defer.inlineCallbacks
def task1():
url = ‘http://www.bilibili.com‘
d = getPage(url.encode(‘utf-8‘))
d.addCallback(response)
yield d
@defer.inlineCallbacks
def task2():
url=‘http://www.baidu.com‘
d = getPage(url.encode(‘utf-8‘))
d.addCallback(response)
url = ‘http://www.bilibili.com‘
d = getPage(url.encode(‘utf-8‘))
d.addCallback(response)
yield d
def response(content):
print(content.decode(‘utf-8‘)[0:1000]) # 這裏只取前1000個字符
def run_until_complete(*args,**kwargs):
reactor.stop()
t1 = task1()
t2 = task2()
all_task = defer.DeferredList([t1,t2])
all_task.addBoth(run_until_complete)
reactor.run()
# 程序的輸出結果如下
‘‘‘
<!DOCTYPE html>
<!--STATUS OK-->
<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=Edge">
<meta content="always" name="referrer">
<meta name="theme-color" content="#2932e1">
<link rel="shortcut icon" href="/favicon.ico" type="image/x-icon" />
<link rel="search" type="application/opensearchdescription+xml" href="/content-search.xml" title="百度搜索" />
<link rel="icon" sizes="any" mask href="//www.baidu.com/img/baidu_85beaf5496f291521eb75ba38eacbd87.svg">
<link rel="dns-prefetch" href="//s1.bdstatic.com"/>
<lin
<!DOCTYPE html><html lang="zh-Hans"><head><meta charset="utf-8"><title>嗶哩嗶哩 (゜-゜)つロ 幹杯~-bilibili</title><meta name="description" content="bilibili是國內知名的視頻彈幕網站，這裏有最及時的動漫新番，最棒的ACG氛圍，最有創意的Up主。大家可以在這裏找到許多歡樂。"><meta name="keywords" content="B站,彈幕,字幕,AMV,MAD,MTV,ANIME,動漫,動漫音樂,遊戲,遊戲解說,ACG,galgame,動畫,番組,新番,初音,洛天依,vocaloid"><meta name="renderer" content="webkit"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="spm_prefix" content="333.334"><meta name="baidu-site-verification" content="gbRdPloQBZ"><meta name="360-site-verification" content="6057b3e352a63d37c14dfc82e2ccb288"><meta name="shenma-site-verification" content="a24cb5f89c4c9cb6d35c24236f4bf36d_1527561745"><meta name="google-site-verification" content="P_nC9t8BcWeyX8lXsTAUIAeHKrFuOYQ_uuCDC9mavwg"><link rel="dns-prefetch" href="//s1.hdslb.com"><link rel="dns-prefetch" href="//i0.hdslb.com"><link rel="dns-prefetch" href="//i1.hdslb.com"><link rel="dns-prefetch" href="//i2.hdslb.com"><link rel="dns-prefetch" href="//static.h
<!DOCTYPE html><html lang="zh-Hans"><head><meta charset="utf-8"><title>嗶哩嗶哩 (゜-゜)つロ 幹杯~-bilibili</title><meta name="description" content="bilibili是國內知名的視頻彈幕網站，這裏有最及時的動漫新番，最棒的ACG氛圍，最有創意的Up主。大家可以在這裏找到許多歡樂。"><meta name="keywords" content="B站,彈幕,字幕,AMV,MAD,MTV,ANIME,動漫,動漫音樂,遊戲,遊戲解說,ACG,galgame,動畫,番組,新番,初音,洛天依,vocaloid"><meta name="renderer" content="webkit"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="spm_prefix" content="333.334"><meta name="baidu-site-verification" content="gbRdPloQBZ"><meta name="360-site-verification" content="6057b3e352a63d37c14dfc82e2ccb288"><meta name="shenma-site-verification" content="a24cb5f89c4c9cb6d35c24236f4bf36d_1527561745"><meta name="google-site-verification" content="P_nC9t8BcWeyX8lXsTAUIAeHKrFuOYQ_uuCDC9mavwg"><link rel="dns-prefetch" href="//s1.hdslb.com"><link rel="dns-prefetch" href="//i0.hdslb.com"><link rel="dns-prefetch" href="//i1.hdslb.com"><link rel="dns-prefetch" href="//i2.hdslb.com"><link rel="dns-prefetch" href="//static.h
‘‘‘
#!/usr/bin/env python
# -*- coding:utf-8 -*-
# author:love_cat
from twisted.internet import reactor,task
def hello(name):
print(‘hello‘, name)
task1 = task.LoopingCall(hello, ‘satori‘) # 每隔十秒鐘運行一次
task1.start(10)
reactor.callWhenRunning(hello, ‘mmp‘) # 當循環開始時，運行
reactor.callLater(3, hello, ‘mmppp‘) # 循環開始後三秒，運行
reactor.run()
‘‘‘
hello satori
hello mmp
hello mmppp
hello satori
hello satori
hello satori
hello satori
hello satori
.....
.....
.....
‘‘‘
(11).scrapy依賴的模塊Twisted