DEV Community

Cover image for Scrape Yahoo! Finance Home Page with Python
Dmitriy Zub ☀️
Dmitriy Zub ☀️

Posted on • Originally published at serpapi.com

Scrape Yahoo! Finance Home Page with Python

#python #tutorial #html #webscraping

Contents:

Intro

This blog post is a continuation of Yahoo! web scraping series. Here you'll see how to scrape Yahoo! Finance Home Page stock and news results data using Python with beautifulsoup, requests, lxml, json, re libraries.

Prerequisites: understanding of beautifulsoup, requests, lxml, json libraries, and regular expressions.

Imports

import requests, lxml, json, re, datetime
from bs4 import BeautifulSoup
Enter fullscreen mode Exit fullscreen mode

What will be scraped

  1. Header stock results
  2. Top news results
  3. Top video news results
  4. Top multiuse news results
  5. Scrolling news results
  6. Right side stock results image

🔝Difference between existing Yahoo! Finance parsers

Since Yahoo! Finance deprecated their API there're a lot of custom solutions out there.

The differences between those parsers and the one you'll see below are:

  • Firstly, this blog post is more educational rather than a complete solution.
  • Secondly, all/most of existing Yahoo! Finance parsers (at least those what I looked at) extract only ticket(s) data, without news results that Yahoo! Finance has.

🔝Process

You can access and navigate through header stock results, news results json string data here.

Dadroit was used to preview json and copy path to specific key, value. Here's how UI looks like:
image

🔝Get header stock results

Firstly, we need to locate where the data is located, since we can't just use CSS selectors to extract the data, because it is dynamically updating from the server.

The way I found where the data is located is very simple. Just copied the stock name and pasted it in the source code and checked if there's a match under the <script> tags.
image

After several matches was found in the same place under the <script> tag I began to look where the <script> tag starts and ends in order to extract the correct one using regular expression. Here's the start of the needed <script> tag.
image

And the end of the <script> tag.
image

Then, regular expression comes into play to extract json string from the <script> tag. Here's a screenshot to see what is being captured (link to regular expression):
image

Note: There's obviously a better regex could be used, I used the easiest a very basic one.

Next is to extract the data and convert it to an iterable json string since re.findall() returns a list, ''.join() making it a string to use json.loads() in the next step.

matched_string = ''.join(re.findall(r'root\.App\.main = (.*);\n+}\(this\)\);\n+</script>', str(all_script_tags)))
matched_string_json = json.loads(matched_string)
Enter fullscreen mode Exit fullscreen mode

After that, the for key, value in dict(...).items() option was used to make the code shorter and easier.

.items() returns a key, value pair so I don't have to specify which stock symbol to iterate over.

It will iterate over each available stock from the response instead and will substitute the correct stock key symbol with appropriate value data.

for key, value in dict(matched_string_json['context']['dispatcher']['stores']['StreamDataStore']['quoteData']).items():
   # extracting header stocks data
   # iterating over "value" variable
Enter fullscreen mode Exit fullscreen mode

Because json response contains unique stock key symbols and creating a different function for each stock symbol will lead to a lot of code, and if some symbol will be changed in the future it will throw an error.
image

If you want to iterate over specific stocks, then you can skip this step and write few functions just to iterate over specific stock results.

Example of Header stock response:

{
  "sourceInterval": 30,
  "exchange": "NYB",
  "regularMarketTime": {
    "raw": 1627325996,
    "fmt": "2:59PM EDT"
  },
  "shortName": "10-Yr Bond",
  "exchangeTimezoneName": "America/New_York",
  "regularMarketChange": {
    "raw": 0,
    "fmt": "0.0000"
  },
  "regularMarketPreviousClose": {
    "raw": 1.276,
    "fmt": "1.2760"
  },
  "exchangeTimezoneShortName": "EDT",
  "exchangeDataDelayedBy": 30,
  "priceHint": 4,
  "regularMarketPrice": {
    "raw": 1.276,
    "fmt": "1.2760"
  },
  "triggerable": false,
  "gmtOffSetMilliseconds": -14400000,
  "firstTradeDateMilliseconds": -252356400000,
  "region": "US",
  "marketState": "REGULAR",
  "quoteType": "INDEX",
  "symbol": "^TNX",
  "language": "en-US",
  "market": "us24_market",
  "regularMarketChangePercent": {
    "raw": 0,
    "fmt": "0.00%"
  },
  "fullExchangeName": "NYBOT",
  "tradeable": false
}
Enter fullscreen mode Exit fullscreen mode

🔝Get Top News Results

for top_news_result_index, top_news in enumerate(matched_string_json_stream):
   # extracting data
Enter fullscreen mode Exit fullscreen mode

🔝Get Top News Video Results

for top_news_video_index, top_news_video in enumerate(matched_string_json_video):
   # extracting data
Enter fullscreen mode Exit fullscreen mode

🔝Get Multiuse News Results

for multiuse_index, multiuse_news in enumerate(matched_string_json_multiuse):
  # extracting data
Enter fullscreen mode Exit fullscreen mode

🔝Get Scrolling News Results

for yahoo_news_index in matched_string_json['context']['dispatcher']['stores']['StreamStore']['streams']['mega.c']['data']['stream_items']:
   # extracting data
Enter fullscreen mode Exit fullscreen mode

🔝Get Right Side Stocks Results

In the dev tools network tab you can see requests being send to the server with GET method, thus you can call them directly to get a json string.

In total, there're 11 URLs (might be changed in the future) but you can make a 1 request call with additional symbols added to the url string without need to make 11 url calls async. Look at yahoo_finance_urls.py.

Note: User-Agent needs to be used, otherwise it will throw a 403 forbidden. What is my user-agent

Approach was the same as in previous section of the post, where received response was converted to a json string for further manipulation.

Headers tab
image

Preview tab
image

🔝File Structure

File structure is basic:

Yahoo_Finance_Main.py
├── Yahoo_Finance_Header_Stocks_News.py
├── Yahoo_Finance_Right_Side_Stocks.py
└── Yahoo_Finance_Urls.py
Enter fullscreen mode Exit fullscreen mode

Jump to specific part:

🔝Full Code

Use fullscreen mode in the top right corner when mouseover a code snippet.

🔙yahoo_finance_main.py
from yahoo_finance_right_side_stocks import yahoo_get_right_side_stocks

from yahoo_finance_header_stocks_news import (
    yahoo_get_header_stock_data,
    yahoo_get_top_news_data,
    yahoo_get_top_news_video_results,
    yahoo_get_multiuse_news_results,
    yahoo_get_news_results,
)


yahoo_get_header_stock_data()
yahoo_get_top_news_data()
yahoo_get_top_news_video_results()
yahoo_get_multiuse_news_results()
yahoo_get_news_results()

yahoo_get_right_side_stocks()
Enter fullscreen mode Exit fullscreen mode
🔙yahoo_finance_header_stocks_news.py
import requests, lxml, json, re, datetime
from bs4 import BeautifulSoup

headers = {
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36"
                  "(KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 Edge/18.19582"
}

html = requests.get('https://finance.yahoo.com/', headers=headers)
soup = BeautifulSoup(html.text, 'lxml')

all_script_tags = soup.select('script')

# https://regex101.com/r/IJloEU/2
matched_string = ''.join(re.findall(r'root\.App\.main = (.*);\n+}\(this\)\);\n+</script>', str(all_script_tags)))
matched_string_json = json.loads(matched_string)


def yahoo_get_header_stock_data():
    for key, value in dict(matched_string_json['context']['dispatcher']['stores']['StreamDataStore']['quoteData']).items():
        symbol = value['symbol']
        exchange = value['exchange']
        full_exchange_name = value['fullExchangeName']

        try:
            short_name = value['shortName']
        except:
            short_name = 'no shorten name'

        exchange_time_zone_name = value['exchangeTimezoneName']
        regular_market_change = value['regularMarketChange']['fmt']
        regular_market_previous_close = value['regularMarketPreviousClose']['fmt']
        regular_market_price = value['regularMarketPrice']['fmt']
        regular_market_change_percent = value['regularMarketChangePercent']['fmt']
        market_state = value['marketState']
        market = value['market']
        quote_type = value['quoteType']


        print(f'Symbol: {symbol}\n'
              f'Short name: {short_name}\n'
              f'Exchange: {exchange}\n'
              f'Full exchange name: {full_exchange_name}\n'
              f'Exchange timezone: {exchange_time_zone_name}\n'
              f'Market state: {market_state}\n'
              f'Market name: {market}\n'
              f'Quote type: {quote_type}\n'
              f'Market price: {regular_market_price}\n'
              f'Market change: {regular_market_change}\n'
              f'Market % change: {regular_market_change_percent}\n'
              f'Market previous close: {regular_market_previous_close}\n')



def yahoo_get_top_news_data():
    matched_string_json_stream = matched_string_json['context']['dispatcher']['stores']['ThreeAmigosStore']['data']['ntk']['stream']

    for top_news_result_index, top_news in enumerate(matched_string_json_stream):
        teaser = top_news['editorialContent']['teaser']
        title = top_news['editorialContent']['title']

        try:
            source = top_news['editorialContent']['content']['provider']['displayName']
        except:
            source = None

        try:
            source_site_link = top_news['editorialContent']['content']['provider']['url']
        except:
            source_site_link = None

        try:
            canonical_url = top_news['editorialContent']['content']['canonicalUrl']['url']
        except:
            canonical_url = None

        try:
            canonical_url_website = top_news['editorialContent']['content']['canonicalUrl']['site']
        except:
            canonical_url_website = None

        try:
            click_through_url = top_news['editorialContent']['content']['clickThroughUrl']['url']
        except:
            click_through_url = None

        try:
            click_through_url_website = top_news['editorialContent']['content']['clickThroughUrl']['site']
        except:
            click_through_url_website = None


        print(f'News result number: {top_news_result_index}\n'
              f'Teaser: {teaser}\n'
              f'Title: {title}\n'
              f'Source: {source}\n'
              f'Source website: {source_site_link}\n'
              f'Canonical URL: {canonical_url}\n'
              f'Canonical URL source: {canonical_url_website}\n'
              f'Click through URL: {click_through_url}\n'
              f'Click through website: {click_through_url_website}\n')

        for resolution in top_news['editorialContent']['thumbnail']['resolutions']:
            thumbnail_size = resolution['tag']
            thumbnail_link = resolution['url']
            print(f'{thumbnail_size} {thumbnail_link}')


def yahoo_get_top_news_video_results():
    matched_string_json_video = matched_string_json['context']['dispatcher']['stores']['ThreeAmigosStore']['data']['videos']['stream']

    for top_news_video_index, top_news_video in enumerate(matched_string_json_video):
        video_title = top_news_video['content']['title']
        video_summary = top_news_video['content']['summary']
        video_duration_not_fixed = top_news_video['content']['duration']

        # seconds converted to minutes
        video_duration_fixed_time = datetime.timedelta(seconds=video_duration_not_fixed)
        video_publication_date = top_news_video['content']['pubDate']
        vide_provider_name = top_news_video['content']['provider']['displayName']
        video_canonical_url = top_news_video['content']['canonicalUrl']['url']
        video_click_through_url = top_news_video['content']['clickThroughUrl']['url']

        print(f'Video number: {top_news_video_index}\n'
              f'Title: {video_title}\nSummary: {video_summary}\n'
              f'Duration: {video_duration_fixed_time}\n'
              f'Publication date: {video_publication_date}\n'
              f'Provider: {vide_provider_name}\n'
              f'Canonical URL: {video_canonical_url}\n'
              f'Click through URL: {video_click_through_url}\n')

        for resolution in top_news_video['content']['thumbnail']['resolutions']:
            thumbnail_size = resolution['tag']
            thumbnail_link = resolution['url']
            print(f'{thumbnail_size} {thumbnail_link}')


def yahoo_get_multiuse_news_results():
    matched_string_json_multiuse = matched_string_json['context']['dispatcher']['stores']['ThreeAmigosStore']['data']['multiuse']['stream']

    for multiuse_index, multiuse_news in enumerate(matched_string_json_multiuse):

        multiuse_title = multiuse_news['content']['title']
        multiuse_content_type = multiuse_news['content']['contentType']
        multiuse_summary = multiuse_news['content']['summary']
        multiuse_provider_name = multiuse_news['content']['provider']['displayName']
        multiuse_provider_url = multiuse_news['content']['provider']['url']
        multiuse_canonical_url = multiuse_news['content']['canonicalUrl']['url']
        multiuse_click_through_url = multiuse_news['content']['clickThroughUrl']['url']

        print(f'Multiuse news number: {multiuse_index}\n'
              f'Title: {multiuse_title}\n'
              f'Content type: {multiuse_content_type}\n'
              f'Summary: {multiuse_summary}\n'
              f'Provider: {multiuse_provider_name}\n'
              f'Provider URL: {multiuse_provider_url}\n'
              f'Canonical URL: {multiuse_canonical_url}\n'
              f'Click through URL: {multiuse_click_through_url}\n')

        for resolution in multiuse_news['content']['thumbnail']['resolutions']:
            thumbnail_size = resolution['tag']
            thumbnail_link = resolution['url']
            print(f'{thumbnail_size} {thumbnail_link}')


def yahoo_get_news_results():
    for yahoo_news_index in matched_string_json['context']['dispatcher']['stores']['StreamStore']['streams']['mega.c']['data']['stream_items']:
        title = yahoo_news_index['title']
        summary = yahoo_news_index['summary']
        news_property = yahoo_news_index['property']
        source = yahoo_news_index['publisher']
        original_publication_url = yahoo_news_index['url']
        yahoo_url = f"https://finance.yahoo.com{yahoo_news_index['link']}"

        try:
            thumbnail_medium = yahoo_news_index['images']['img:440x246']['url']
        except:
            thumbnail_medium = None

        try:
            thumbnail_small = yahoo_news_index['images']['img:220x123']['url']
        except:
            thumbnail_small = None

        print(f'Title: {title}\n'
              f'Summary: {summary}\n'
              f'Property: {news_property}\n'
              f'Source: {source}\n'
              f'Original URL: {original_publication_url}\n'
              f'Yahoo URL: {yahoo_url}\n'
              f'Medium thumbnail: {thumbnail_medium}\n'
              f'Small thumbnail: {thumbnail_small}\n')
Enter fullscreen mode Exit fullscreen mode
🔙yahoo_finance_urls.py

Note: Stock symbols are changing each day, and that's the reason why they're currently hardcoded to give some sort "flexibility" to change to whatever stock symbol is needed.

These stock symbols can be intercepted since they are loaded over time, but at the moment I don't figured out how to make it work.

import requests


def yahoo_finance_right_stock_urls():

    headers = {
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36"
                      "(KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 Edge/18.19582"
    }

    '''
    Symbols below will not be exactly the same as on Yahoo Finance Home Page.

    If you want to track specific tickets, leave it as it is and it will work,
    otherwise "symbols" need to be changed to the one on the Yahoo Finance Home page.

    In the further blog posts this might be changed to auto ticket detection.
    '''

    symbols = ','.join([
        "BTC-USD",
        "ETH-USD",
        "USDT-USD",
        "BNB-USD",
        "ADA-USD",

        "ETSY",
        "FSLY",
        "GM",
        "ROKU",
        "UBER",

        "AMD",
        "HOOD",
        "AMC",
        "F",
        "GM",

        "AZZVF",
        "HOOD",
        "EXPI",
        "COUR",
        "NVAX",

        "ZY",
        "CDLX",
        "OCFT",
        "CAR",
        "CGRY",

        "HSSIX",
        "HSSCX",
        "FFBFX",
        "PRGTX",
        "HSSAX",

        "QQQ",

        "BTCUSD",
        "ETHUSD",
        "EURUSD=X",
        "JPY=X",
        "GBPUSD=X"

        "HSSIX",
        "HSSCX",
        "FFBFX",
        "PRGTX",
        "HSSAX"

        "ES=F",
        "YM=F",
        "NQ=F",
        "RTY=F",
        "ZB=F",

        "GE220121C00010000",
        "GE220121C00012000",
        "GE220121C00015000",
        "GE220121P00007000",
        "GE220121P00010000",

        "LLNW210806C00001000",
        "OBSV210820C00010000",
        "OBSV210820C00012500",
        "OBSV210820C00015000"
    ])

    params = {
        'formatted': "true",
        'crumb': 'FI5oDlMl7HO',
        'lang': 'en-US',
        'region': 'US',
        'symbols': f"{symbols}",
        'fields': 'symbol,shortName,longName,regularMarketPrice,regularMarketChange,regularMarketChangePercent',
        'corsDomain': 'finance.yahoo.com'
    }

    yahoo_urls = requests.get('https://query2.finance.yahoo.com/v7/finance/quote', params = params, headers = headers).text

    return yahoo_urls
Enter fullscreen mode Exit fullscreen mode
🔙Extracting Right Side Stocks
import json
from yahoo_finance_urls import yahoo_finance_right_stock_urls


headers = {
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36"
                  "(KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 Edge/18.19582"
}


def yahoo_get_right_side_stocks():

    for right_side_stock_result in json.loads(yahoo_finance_right_stock_urls())['quoteResponse']['result']:
        stock_symbol = right_side_stock_result['symbol']
        short_name = right_side_stock_result['shortName']
        region = right_side_stock_result['region']
        regular_market_time = right_side_stock_result['regularMarketTime']['fmt']
        exchange_time_zone_name = right_side_stock_result['exchangeTimezoneName']
        market_state = right_side_stock_result['marketState']
        quote_type = right_side_stock_result['quoteType']

        try:
            quote_source_name = right_side_stock_result['quoteSourceName']
        except:
            quote_source_name = None

        market = right_side_stock_result['market']
        regular_market_price = right_side_stock_result['regularMarketPrice']['fmt']
        regular_market_change = right_side_stock_result['regularMarketChange']['fmt']
        regular_market_change_percent = right_side_stock_result['regularMarketChangePercent']['fmt']

        print(f'Quote type: {quote_type}\n'
              f'Quote source name: {quote_source_name}\n'
              f'Symbol: {stock_symbol}\n'
              f'Short name: {short_name}\n'
              f'Region: {region}\n'
              f'Regular market time: {regular_market_time}\n'
              f'Exchange time zone: {exchange_time_zone_name}\n'
              f'Market: {market}\n'
              f'Market state: {market_state}\n'
              f'Market price: {regular_market_price}\n'
              f'Price change: {regular_market_change}\n'
              f'Price % change: {regular_market_change_percent}\n')
Enter fullscreen mode Exit fullscreen mode

Code in the online IDE • Dadroit • treelib

🔝Outro

There're absolutely more clever ways to make the code better and more improvements need to be done.

If you have any questions or something isn't working correctly or you want to write something else, feel free to drop a comment in the comment section or via Twitter at @serp_api.

Yours,
Dimitry, and the rest of SerpApi Team.

Top comments (0)

Read next

mr_destructive profile image

Making an Anonymous ChatGPT Client in Python

Meet Rajesh Gor -

jeffreythecoder profile image

5 Simple Steps to Start Contributing to Open Source

Jeffrey Yu -

ccoveille profile image

Git: The complete guide to sign your commits with an SSH key

Christophe Colombier -

wassafshahzad profile image

Building Real-Time Communication: Harnessing WebRTC with FastAPI Part 3- Wrapping Every thing up

Wassaf Shahzasd -