I am very novice to Python and programming in general so please forgive my lack of insight. I have managed to web-scrape some data with Xpath.
#Dependencies
from lxml import html
import requests
#URL
url = 'https://web.archive.org/web/20171004082203/https://www.yellowpages.com/houston-tx/air-conditioning-service-repair'
#Use Requests to retrieve html
resp = requests.get(url)
#Create Tree from Request Response
tree = html.fromstring(resp.content)
#Create Tree element
elements = tree.xpath('//*[starts-with(#id,"lid-")]/div/div/div[2]/div[2]/div[2]/a[1]')
# Scrape for URL and split for just business url
websites= (elements[0].attrib['href'].split("http://")[1])
The output of this code returns a single website url. However, I would like to print all the business urls to eventually put to a Pandas data frame.
How can I retrieve elements[0],elements[1],elements[2]... in one variable or expression?
I am sure there is an iterative function or list comprehension for this but I cannot wrap my brain around it. I'm thinking something like this:
Can I create a function to iterate through the 'elements[0]' and return all my values?
Any help is greatly appreciated, Thanks!
Here is a quick fix that will get the websites from this particular site working from your code; it stores them all in the 'websites' list. That said if you're working on a webscraper you'd probably be better served working with Beautiful Soup
#Create Tree element
elements = tree.xpath('//*[starts-with(#id,"lid-")]/div/div/div[2]/div[2]/div[2]/a[1]')
websites = []
for element in elements:
try:
websites.append("http"+element.attrib['href'].split("http")[2])
except:
continue
for website in websites:
print(website, '\n')
Related
I'm very new to Python and am attempting my first web scraping project. I'm attempting to extract the data following a tag within a XML data source. I've attached an image of the data I'm working with. My issue is that, it seems like no matter what tag I try to extract I constantly return no results. I am able to return the entire data source so I know the connection is not the issue.
My ultimate goal is to loop through all of the data and return the data following a particular tag. I think if I can understand why I'm unable to print a singular particular tag I should be able to figure out how to loop through all of the data. I've looked through similar posts but I think the tree in my set of data is particularly troublesome (that and my inexperience).
My Code:
from bs4 import BeautifulSoup
import requests
#Assign URL to scrape
URL = "http://api.powertochoose.org/api/PowerToChoose/plans?zip_code=78364"
#Fetch the raw HTML Data
Data = requests.get(URL)
Soup = BeautifulSoup(Data.text, "html.parser")
tags = Soup.find_all('fact_sheet')
print (tags)
Try to check the response of your example first, it is JSON not XML so no BeautifulSoup needed here, simply iterate the data list to pick your fact_sheets:
for plan in Data.json()['data']:
print(plan['fact_sheet'])
Out:
https://rates.cleanskyenergy.com:8443/rates/DownloadDoc?path=a70e9298-5537-481a-985c-c7a005b2e4f3.html&id_plan=223344
https://texpo-prod-api.eroms.works/api/v1/document/ViewProductDocument?type=efl&rateCode=SRCPLF24PTC&lang=en
https://www.txu.com/Handlers/PDFGenerator.ashx?comProdId=TCXSIMVL1212AR&lang=en&formType=EnergyFactsLabel&custClass=3&tdsp=AEPTCC
https://signup.myvaluepower.com/Home/EFL?productId=32653&Promo=16410
https://docs.cloud.flagshippower.com/EFL?term=36&duns=007924772&product=galleon&lang=en&code=FPSPTC2
...
As you've already realized by now, you're getting the data as json, so doing something like:
fact_sheet_links = [d['fact_sheet'] for d in Data.json()['data']]
would get you the data you want.
But also, if you'd prefer to work with the xml, you can add headers to the request:
Data = requests.get(URL, headers={ 'Accept': 'application/xml' })
and get an xml response. When I did this, Soup.find_all('fact_sheet') still did not work (although I've seen this method used in some tutorials, so it might be a version problem - and it might still work for you), but it did work when I used find_all with lambda:
tags = Soup.find_all(lambda t: 'fact_sheet' in t.name)
and the results after altering your code looked like this. That just gives you the tags though, so if you want a list of the contents instead, one way would be to use list comprehension:
fact_sheet_links = [t.text for t in tags]
so that you get them like this.
I am currently learning web scraping with python. I'm reading Web scraping with Python by Ryan Mitchell.
I am stuck at Crawling Sites Through Search. For example, reuters search given in the book works perfectly but when I try to find it by myself, as I will do in the future, I get this link.
Whilst in the second link it is working for a human, I cannot figure out how to scrape it due to weird class names like this class="media-story-card__body__3tRWy"
The first link gives me simple names, like this class="search-result-content" that I can scrape.
I've encountered the same problem on other sites too. How would I go about scraping it or finding a link with normal names in the future?
Here's my code example:
from bs4 import BeautifulSoup
import requests
from rich.pretty import pprint
text = "hello"
url = f"https://www.reuters.com/site-search/?query={text}"
response = requests.get(url)
soup = BeautifulSoup(response.text, "lxml")
results = soup.select("div.media-story-card__body__3tRWy")
for result in results:
pprint(result)
pprint("###############")
You might resort to a prefix attribute value selector, like
div[class^="media-story-card__body__"]
This assumes that the class is the only one ( or at least notationally the first ). However, the idea can be extended to checking for a substring.
I am new to Python and I've been working on a program that alerts you when a new item is uploaded to jp.mercari.com (a shopping site). I have the alert part of the program working, but it operates based on the number of items that come up on the search results. When I scrape the website I am unable to find what I am looking for despite being able to locate it when I inspect element on the page. The scraping program looks like this:
from bs4 import BeautifulSoup
import requests
url = "https://jp.mercari.com/search?keyword=pachinko"
result = requests.get(url)
doc = BeautifulSoup(result.text, "html.parser")
tag = doc.find_all("mer-text")
print(tag)
For more context, this is the website and some of the HTML. I've circled the parts I am trying to find in red:
Does anyone know why I am unable to find what I'm looking for?
Here is another example of the same problem but from a website that is in English:
import requests
url = "https://www.vinted.co.uk/vetements?search_text=pachinko"
result = requests.get(url)
doc = BeautifulSoup(result.text, "html.parser")
tag = doc.find_all("span")
print(tag)
Again, I can see the part of HTML I want to find when I inspect element but I can't find it when I scrape the website:
Here's what's happening with me: the element you seek (<mer-text>) is being found. However, the output is in Japanese, and Python doesn't know what to do with that. In my browser, it's being translated to English automatically by Google, so that's easier to deal with.
I'm writing in Python to try and get exchange rates from the website:
xe.com/currency/converter (I can't post another link, sorry - I'm at limit)
I want to be able to get rates from this file, for example, for the conversion between GBP and USD:
Therefore, I would search the url: "http://www.xe.com/currencyconverter/convert/?Amount=1&From=GBP&To=USD" , then get the value printed "1.56371 USD" (the rates at the time I was writing this message), and assign that value as an int to a variable, like rate_usd.
At the moment, I was thinking about using the BeautifulSoup module and urllib.request module, and request the url ("http://www.xe.com/currencyconverter/convert/?Amount=1&From=GBP&To=USD") and search through it using BeautifulSoup. At the moment, I'm at this stage in the coding:
import urllib.request
import bs4 from BeautifulSoup
def rates_fetcher(url):
html = urllib.request.urlopen(url).read()
soup = BeautifulSoup(html)
# code to search through soup and fetch the converted value
# e.g. 1.56371
# How would I extract this value?
# I have inspected the page element and found the value I want to be in the class:
# <td width="47%" align="left" class="rightCol">1.56371
# I'm thinking about searching through the class: class="rightCol"
# and extracting the value that way, but how?
url1 = "http://www.xe.com/currencyconverter/convert/?Amount=1&From=GBP&To=USD"
rates_fetcher(url1)
Any help would be much appreciated, and thank you whoever took the time to read this.
p.s. Sorry in advance if I have made any typos, I'm kinda' in a hurry :s
It sounds like you've got the right idea.
def rates_fetcher(url):
html = urllib.request.urlopen(url).read()
soup = BeautifulSoup(html)
return [item.text for item in soup.find_all(class_='rightCol')]
That should do it... This will return a list of the text inside any tag with the class 'rightCol'.
If you haven't read through the Beautiful Soup documentation, you really oughtta. It's straightforward and very useful.
Try pyquery. It's a lot better than Soup.
PS: For urllib, try Requests: Http for humans
PS2: Actually I use Node and jQuery/jQuery-like for html scrapping at last.
I am trying to extract numeric data from a website. I tried using a simple web scraper to retrieve the data:
from mechanize import Browser
from bs4 import BeautifulSoup
mech = Browser()
url = "http://www.oanda.com/currency/live-exchange-rates/"
page = mech.open(url)
html = page.read()
soup = BeautifulSoup(html)
data1 = soup.find(id='EUR_USD-b-int')
print data1
This kind of approach normally would give the line of data from the website including the contents of the element I am trying to extract. However it gives everything but the contents which is the part I need. I have tried .contents and it returns []. I've also tried .child and it returns 'none'. Does anyone know another method that could work. I have looked through the beautiful soup documentation but I can't seem to find a solution?
The value on this page is updated using Javascript by making a request to
GET http://www.oanda.com/lfr/rates_lrrr?tstamp=1392757175089&lrrr_inverts=1
Referer: http://www.oanda.com/currency/live-exchange-rates/
(Be aware that I was blocked 4 times just looking at this, they are extremely block-happy. This is because they sell this data commercially as a subscription service.)
The request is made and the response parsed in http://www.oanda.com/jslib/wl/lrrr/liverates.js. The response is "encrypted" with RC4 (http://en.wikipedia.org/wiki/RC4)
The RC4 decrypt method is coming from http://www.oanda.com/wandacache/rc4-ea63ca8c97e3cbcd75f72603d4e99df48eb46f66.js. It looks like this file is refreshed often so you'll need to grab the latest link from the homepage and extract the var key=<value> to fully decrypt the value.