web-scraping

问题 I'm using Selenium and Chromdriver which will load the site just fine including the Javascript loaded data. My problem is a normal Chrome browser will update over time when this data changes and the Chromedriver holds the first static data it was sent. I haven't had any better luck with PhantomJS or firefox as a webdriver. So is there anyway to use a normal Chrome browser? Or even IE? I know in theory I could have it load a Chrome browser and watch the network traffic for the data I'm looking

问题 I'm using Selenium and Chromdriver which will load the site just fine including the Javascript loaded data. My problem is a normal Chrome browser will update over time when this data changes and the Chromedriver holds the first static data it was sent. I haven't had any better luck with PhantomJS or firefox as a webdriver. So is there anyway to use a normal Chrome browser? Or even IE? I know in theory I could have it load a Chrome browser and watch the network traffic for the data I'm looking

问题 I'm using Selenium and Chromdriver which will load the site just fine including the Javascript loaded data. My problem is a normal Chrome browser will update over time when this data changes and the Chromedriver holds the first static data it was sent. I haven't had any better luck with PhantomJS or firefox as a webdriver. So is there anyway to use a normal Chrome browser? Or even IE? I know in theory I could have it load a Chrome browser and watch the network traffic for the data I'm looking

问题 I want to collect all the revisions history data at once. Pywikibot page.revisions() does not have the parameter to fetch number of bytes changed. It gives me all the data that I need except the number of bytes changed. How do I get the number of bytes changed? for example: for the article Main Page the revision history is here: history screenshot My current code: import pywikibot site = pywikibot.Site("en", "wikipedia") page = pywikibot.Page(site, "Main_Page") revs = page.revisions() Showing

问题 I want to collect all the revisions history data at once. Pywikibot page.revisions() does not have the parameter to fetch number of bytes changed. It gives me all the data that I need except the number of bytes changed. How do I get the number of bytes changed? for example: for the article Main Page the revision history is here: history screenshot My current code: import pywikibot site = pywikibot.Site("en", "wikipedia") page = pywikibot.Page(site, "Main_Page") revs = page.revisions() Showing

问题 I am trying to get data from PDFs available on the site https://usda.library.cornell.edu/concern/publications/3t945q76s?locale=en For example, If I look at November 2019 report https://downloads.usda.library.cornell.edu/usda-esmis/files/3t945q76s/dz011445t/mg74r196p/latest.pdf I need the data on Page 12 for corns, I have to create separate files for ending stocks, exports etc. I am new to Python and I am not sure how to scrape the content separately. If I can figure it out for one month then

问题 What I need is to add a script tag to the head of html document. I am using the code below but when I view page source, the script is not there. Thank you in advance, driver = webdriver.Chrome() driver.get("http://www.x.org") execu = ''' var scr = document.createElement('script'); scr.type = 'text/javascript'; scr.text = `let calls = (function(){ let calls = 0; let fun = document.createElement; document.createElement = function(){ calls++; return fun.apply(document, arguments); } return ()=

问题 I'm trying to search the ProQuest Archiver using R. I'm interested in finding the number of articles for a newspaper containing a certain keyword. It generally works well using the rvest tool. However, the program sometimes breaks down. See this minimal example: library(xml2) library(rvest) # Retrieve the title of the first search hit on the page of search results for (p in seq(0, 150, 10)) { searchURL <- paste("http://pqasb.pqarchiver.com/djreprints/results.html?st=advanced&QryTxt=bankruptcy

问题 This is a follow up to the solution to this question: How to extract data from HTML page source of (a tab within) a webpage? I am trying to do the same for Cash Flow Stmt at finance.yahoo.com/quote/AAPL/cash-flow?p=AAPL - using .getJSONObject("dispatcher") .getJSONObject("stores") .getJSONObject("QuoteSummaryStore") .getJSONObject("cashflowStatementHistory") .getJSONArray("cashflowStatements"); trying to extract the value of the key trailingFreeCashFlow - BUT, it failes with the error "No

问题 I am trying to extract the plot of a movie, from the wikipedia page, in Python using BeautifulSoup. I am new to Python and BeautifulSoup so I am not sure how to actually approach it. This is the input code. <h2><span class="mw-headline" id="Plot">Plot</span><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php? title=Moana_(2016_film)&action=edit&section=1" title="Edit section: Plot">edit</a><span class="mw-editsection-bracket">]</span></span></h2> <p