bs4 python

First, the environment (1) WINDWS 10 (2) Python 2.7 (3) Pycharm Second, detailed code (1) Log Analysis class Import logging Import getpass import sys to define MyLog class class MyLog (object): The constructor def mylog (self) for the class __init__: Self . user = Getpass.getuser () Self.logger = Logging.getlogger (self.user) self.logger.setLevel (logging. DEBUG) The log file name Self.logfile = sys.argv[0][0:-3] + '. Log ' self.formatter = loggin

The Prettify () method of the BS4 library: To print a label: For Chinese HTML code, you can also print directly: Method of HTML content lookup based on BS4 library Name: Retrieves a string for the label name. where (Import re) is the import of the regular expression library. Attrs: A string that retrieves the value of a tag property, which can b

Label:Example:http://xyzp.haitou.cc/article/722427.html The first is to download each page directly, you can use Os.system ("wget" +str (URL)) or Urllib2.urlopen (URL), very simple not to repeat. Then, the plays, to extract information: #!/usr/bin/env python #Coding=utf-8 fromBs4ImportBeautifulSoupImportCodecsImportSYSImportOS Reload (SYS) sys.setdefaultencoding ("Utf-8") ImportRe fromPymongoImportmongoclientdefget_jdstr (fname): Soup=""retdict={} w

'soup.a.next_sibling.next_sibling# return to soup.a.previous_siblingsoup.a.previous_sibling.previous_sibling# parallel traversal of the tag tree # Traverse subsequent nodes for inch soup.a.next_siblings: Print (sibling) # traversing a previous node for inch soup.a.previous_siblings: Print (sibling)HTML formatting and encoding based on BS4Formatting:When we use the soup.prettify () statement, Prettiffy () adds a newline character to the HTML file so that the file is properly output as

#https://www.crummy.com/software/beautifulsoup/bs4/doc/index.zh.html#find-all#beautifulSoup可以解析HTML, download the installation using PIP install BEAUTIFULSOUP4, the module is imported using BS4.Import BS4NOSTARCHSOUP=BS4. BeautifulSoup (Res.text)#bs4. The BeautifulSoup () function returns a BeautifulSoup object.#也可以像Be

Recently used in the Project crawler, also read a lot of modules, and finally chose the more useful requests and BS4, in which the confusion to explain. Requests Area Load page, use BeautifulSoup to do parsing Response = Requests.get (' http://www.infoq.com/cn/articles ') print response >>>200 Here 200 is the HTTP status code, And 200 indicates that the server successfully processed the request Response = Response. Text The above actions will get the

{Code ...} the above is my code, using soup. after the find_all () function is used, 64 tag segments are obtained in coursera. However, after recursive objects and files are written, controlb obtains the names of 64 first courses, as shown below,

Python web crawler and information extraction (2) -- BeautifulSoup, BeautifulSoup official introduction: Beautiful Soup is a Python library that can extract data from HTML or XML files. It can implement the usual document navigation, searching, and modifying methods through your favorite converter. Https://www.crummy.com/software/BeautifulSoup/Install BeautifulSoup Find "cmd.exe" in "C: \ Windows \ System3

1. Installing BEAUTIFULSOUP4Easy_install installation method, Easy_install need to be installed in advance Easy_install BEAUTIFULSOUP4 Pip installation method, Pip also needs to be installed in advance. There is also a BeautifulSoup package in PyPI, which is the release version of Beautiful Soup3. Installation is not recommended here. Pip Install Beautifulsoup4 Debain or Ubuntu installation mode Apt-get Install PYTHON-

Learning notes for python crawler Beautifulsoup,Related content: What is beautifulsoup? Bs4 usage Import Module Select use parser Search by Tag Name Use find \ find_all to find Search Using select Start Time: What is beautifulsoup: Is a Python library that can extract data from HTML or XML files. It can use your favorite co

Learning python Network Data Collection notes-Chapter 1 and Chapter 2: python data collection If the English version is poor, you can only view the Chinese version. The translation of Posts and Telecommunications publishing house is really bad. The above is the message, and the following is the text. We recommend that you install Python or a later version of ptho

Python Network data collection 3-data stored in CSV and MySQL Warm up first and download all the pictures from a page. Import requestsfrom BS4 Import beautifulsoupheaders = {' user-agent ': ' mozilla/5.0 (Windows NT 10.0; Win64; x64) applewebkit/537.36 (khtml, like Gecko) ' chrome/52.0.2743.116 safari/537.36 edge/15.16193 '}start_url = ' https ://www.pythonscraping.com ' r = Requests.get (Start_url, header