urllib2 | 易学教程

Python Requests Multipart HTTP POST

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问题 I was wondering how do you translate something like this using Python Requests? In urllib2, you can manually manipulate the data that is being sent over the wire to the API service, but Requests claims multipart file uploads are easy. However, when trying to send over the same request using the Requests library, I believe that it is not specifying some key parameters in the content-type for each of the two parts correctly. Can someone please shed some light on this matter. Thank you in

史上最权威Python爬虫入门教程，15天就能轻松搞定，自嗨玩到爆

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Python是一种简单易学，功能强大的编程语言，它有高效率的高层数据结构，简单而有效地实现面向对象编程。Python简洁的语法和对动态输入的支持，再加上解释性语言的本质，使得它在大多数编程语言的使用场景中都堪称最优解。成熟的Python工程师在自己的工作中会使用不同的工具，也因此产生不同见解，有人爱Django，有人爱Numpy，有人爱Tensorflow，甚至有些程序员会自己创造工具。不过对于初学者而言，答案可能只有一个：爬虫。那么什么是爬虫？互联网上有着无数的网页，包含着海量的信息，无孔不入、森罗万象。但很多时候，无论出于数据分析或产品需求，我们需要从某些网站，提取出我们感兴趣、有价值的内容，那么我们如何去提取？难道还是要靠传统模式去粘贴和复制吗？在当今大数据时代，显然这种模式已经不适用，所以我们需要一种能自动获取网页内容并可以按照指定规则提取相应内容的程序。这就是爬虫！特别的Python爬虫入门到实战课程，从最基础的爬虫分类讲起，用史上最详细的视频教程帮助你快速入门爬虫。只需要10个小时，你就能从新手完成进阶！这是一门什么样的课程？这是一门面向Python初学者和爬虫爱好者，提供爬虫知识入门和进阶的课程，可以帮助你快速入门。这门课程有什么特点？这门课程为零基础人士进行了特别优化。我们将从爬虫基础开始讲起，视频教程内容十分详细，涵盖几乎所有初学者必备知识点

Cannot fetch URLs from GAE local environment

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问题 I'm getting the following error when trying to fetch an URL with urllib2 in the google app engine: error: An error occured while connecting to the server: Unable to fetch URL: http://www.google.com Error: [Errno 10106] getaddrinfo failed This is the code calling the urllib2 open read methods: def get(self): self.write(urllib2.urlopen("http://www.google.com").read()) self.render_index() Nothing fancy, just a call to the library inside the main handler to ouptut the fetched text. My PC resolves

urllib2 returns 404 for a website which displays fine in browsers

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问题 I am not able to open one particular url using urllib2. Same approach works well with other websites such as "http://www.google.com" but not this site (which also displays fine in the browser). my simple code: from BeautifulSoup import BeautifulSoup import urllib2 url="http://www.experts.scival.com/einstein/" response=urllib2.urlopen(url) html=response.read() soup=BeautifulSoup(html) print soup Can anyone help me to make it work? this is error I got: Traceback (most recent call last): File "

Make Urllib2 move through pages

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问题 I am trying to scrape http://targetstudy.com/school/schools-in-chhattisgarh.html I am usling lxml.html, urllib2 I want somehow, follow all the pages by clicking the next page link and download its source. And make it stop at the last page. The href for next page is ['?recNo=25'] Could someone please advise how to do that, Thanks in advance. Here is my code, import urllib2 import lxml.html import itertools url = "http://targetstudy.com/school/schools-in-chhattisgarh.html" req = urllib2.Request

Python: urllib2.HTTPError: HTTP Error 300: Multiple Choices

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问题 I have a script that is looking for informations in web text pages and then store them in a dictionary. The script is looking for URL in a list and then process them all in a loop, however it get interrupted in the middle of the process by this error: Traceback (most recent call last): File "<stdin>", line 3, in <module> File "/usr/lib/python2.7/urllib2.py", line 126, in urlopen return _opener.open(url, data, timeout) File "/usr/lib/python2.7/urllib2.py", line 406, in open response = meth(req

Python autologin using mechanize

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问题 FIXED! updated with working code I have been going about trying to make this auto login thing working for me. Do note I'm still a Python novice at this point. The following is the html code I found when I inspected the relevant form: <form action="/cgi-bin/netlogin.pl" method="post" name="netlogin"> <tr> <td><div align="right">Intranet userid:</div></td> <td><input type="text" size="20" maxlength="50" name="uid" id="uid" class="formField" /></td> </tr> <tr> <td><div align="right">Wachtwoord:<

Python/Urllib2/Threading: Single download thread faster than multiple download threads. Why?

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问题 i am working on a project that requires me to create multiple threads to download a large remote file. I have done this already but i cannot understand while it takes a longer amount of time to download a the file with multiple threads compared to using just a single thread. I used my xampp localhost to carry out the time elapsed test. I would like to know if its a normal behaviour or is it because i have not tried downloading from a real server. Thanks Kennedy 回答1: 9 women can't combine to

Urllib2 raises 403 error while the same request in curl works fine

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问题 how would i tranfoms this curl command: curl -v -d email=onlinecrapbox@gmail.com -d password=mypassword -X POST https://www.toggl.com/api/v6/sessions.json into urlib2? Why is this not working: url= 'https://www.toggl.com/api/v6/sessions.json' username = 'onlinecrapbox@gmail.com' password = 'mypassword' passman = urllib2.HTTPPasswordMgrWithDefaultRealm() passman.add_password(None, url, username, password) authhandler = urllib2.HTTPBasicAuthHandler(passman) opener = urllib2.build_opener

Python TypeError while using xml.etree.ElemenTree and requests

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问题 This works for me: import xml.etree.ElementTree as ET from urllib2 import urlopen url = 'http://example.com' # this url points to a `xml` page tree = ET.parse(urlopen(url)) However, when I switch to requests , something was wrong: import requests import xml.etree.ElementTree as ET url = 'http://example.com' # this url points to a `xml` page tree = ET.parse(requests.get(url)) The trackback error is showed below: ---------------------------------------------------------------------------