- What will be scraped
- DIY Prerequisites
- Links
- Outro
What will be scraped
Using Google Finance API from SerpApi
This section is to show differences in accessing data between our API and DIY solutions below.
First of all, SerpApi gives access to timeseries chart data, meaning you could build the same graph that Google displayes on the page itself. DIY solution doesn't have it.
Addtionally, you could create your own historical price database by accessing data once in a N period of time.
Another difference is that SerpApi handles blocks on the backend so your IP won't be blocked if you do it yourself (unless proxies are used). And there's no need to maintain the parser if something in the HTML will be changed and cause an error.
Example code to integrate:
from serpapi import GoogleSearch
params = {
'api_key': '...', # https://serpapi.com/manage-api-key
'engine': 'google_finance', # serpapi parser engine
'q': 'GOOGL:NASDAQ' # search query, ticker name in this case
# language parameter,
# or other parameter that appears on Google Finance even
# if SerpApi doesn not support it (click "Test other parameter" in the playground)
}
search = GoogleSearch(params)
results = search.get_dict()
print(results.keys())
# dict_keys(['search_metadata', 'search_parameters', 'markets', 'summary', 'graph', 'knowledge_graph', 'news_results', 'financials', 'discover_more'])
# get timeseries data
for price in results['graph']:
print(price['price'])
As a side note, we also have a blog posts about Google Finance topic:
DIY Prerequisites
Basic knowledge scraping with CSS selectors
CSS selectors declare which part of the markup a style applies to thus allowing to extract data from matching tags and attributes.
If you haven't scraped with CSS selectors, there's a dedicated blog post of mine
about how to use CSS selectors when web-scraping that covers what it is, pros and cons, and why they matter from a web-scraping perspective.
Separate virtual environment
In short, it's a thing that creates an independent set of installed libraries including different Python versions that can coexist with each other in the same system thus preventing libraries or Python version conflicts.
If you didn't work with a virtual environment before, have a look at the
dedicated Python virtual environments tutorial using Virtualenv and Poetry blog post of mine to get a little bit more familiar.
📌Note: this is not a strict requirement for this blog post.
Install libraries:
pip install requests parsel
Reduce the chance of being blocked
There's a chance that a request might be blocked. Have a look
at how to reduce the chance of being blocked while web-scraping, there are eleven methods to bypass blocks from most websites.
DIY Scraping Google Finance Ticker Quote Data
from bs4 import BeautifulSoup
import requests, lxml, json
# https://docs.python.org/3/library/itertools.html#itertools.zip_longest
from itertools import zip_longest
def scrape_google_finance(ticker: str):
params = {
"hl": "en" # language
}
headers = {
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.60 Safari/537.36",
}
html = requests.get(f"https://www.google.com/finance/quote/{ticker}", params=params, headers=headers, timeout=30)
selector = Selector(text=html.text)
# where all extracted data will be temporary located
ticker_data = {
"ticker_data": {},
"about_panel": {},
"news": {"items": []},
"finance_perfomance": {"table": []},
"people_also_search_for": {"items": []},
"interested_in": {"items": []}
}
# current price, quote, title extraction
ticker_data["ticker_data"]["current_price"] = selector.css(".AHmHk .fxKbKc::text").get()
ticker_data["ticker_data"]["quote"] = selector.css(".PdOqHc::text").get().replace(" • ",":")
ticker_data["ticker_data"]["title"] = selector.css(".zzDege::text").get()
# about panel extraction
about_panel_keys = selector.css(".gyFHrc .mfs7Fc::text").getall()
about_panel_values = selector.css(".gyFHrc .P6K39c").xpath("normalize-space()").getall()
for key, value in zip_longest(about_panel_keys, about_panel_values):
key_value = key.lower().replace(" ", "_")
ticker_data["about_panel"][key_value] = value
# description "about" extraction
ticker_data["about_panel"]["description"] = selector.css(".bLLb2d::text").get()
ticker_data["about_panel"]["extensions"] = selector.css(".w2tnNd::text").getall()
# news extarction
if selector.css(".yY3Lee").get():
for index, news in enumerate(selector.css(".yY3Lee"), start=1):
ticker_data["news"]["items"].append({
"position": index,
"title": news.css(".Yfwt5::text").get(),
"link": news.css(".z4rs2b a::attr(href)").get(),
"source": news.css(".sfyJob::text").get(),
"published": news.css(".Adak::text").get(),
"thumbnail": news.css("img.Z4idke::attr(src)").get()
})
else:
ticker_data["news"]["error"] = f"No news result from a {ticker}."
# finance perfomance table
if selector.css(".slpEwd .roXhBd").get():
fin_perf_col_2 = selector.css(".PFjsMe+ .yNnsfe::text").get() # e.g. Dec 2021
fin_perf_col_3 = selector.css(".PFjsMe~ .yNnsfe+ .yNnsfe::text").get() # e.g. Year/year change
for fin_perf in selector.css(".slpEwd .roXhBd"):
if fin_perf.css(".J9Jhg::text , .jU4VAc::text").get():
perf_key = fin_perf.css(".J9Jhg::text , .jU4VAc::text").get() # e.g. Revenue, Net Income, Operating Income..
perf_value_col_1 = fin_perf.css(".QXDnM::text").get() # 60.3B, 26.40%..
perf_value_col_2 = fin_perf.css(".gEUVJe .JwB6zf::text").get() # 2.39%, -21.22%..
ticker_data["finance_perfomance"]["table"].append({
perf_key: {
fin_perf_col_2: perf_value_col_1,
fin_perf_col_3: perf_value_col_2
}
})
else:
ticker_data["finance_perfomance"]["error"] = f"No 'finence perfomance table' for {ticker}."
# "you may be interested in" results
if selector.css(".HDXgAf .tOzDHb").get():
for index, other_interests in enumerate(selector.css(".HDXgAf .tOzDHb"), start=1):
ticker_data["interested_in"]["items"].append(discover_more_tickers(index, other_interests))
else:
ticker_data["interested_in"]["error"] = f"No 'you may be interested in` results for {ticker}"
# "people also search for" results
if selector.css(".HDXgAf+ div .tOzDHb").get():
for index, other_tickers in enumerate(selector.css(".HDXgAf+ div .tOzDHb"), start=1):
ticker_data["people_also_search_for"]["items"].append(discover_more_tickers(index, other_tickers))
else:
ticker_data["people_also_search_for"]["error"] = f"No 'people_also_search_for` in results for {ticker}"
return ticker_data
def discover_more_tickers(index: int, other_data: str):
"""
if price_change_formatted will start complaining,
check beforehand for None values with try/except and set it to 0, in this function.
however, re.search(r"\d{1}%|\d{1,10}\.\d{1,2}%" should make the job done.
"""
return {
"position": index,
"ticker": other_data.css(".COaKTb::text").get(),
"ticker_link": f'https://www.google.com/finance{other_data.attrib["href"].replace("./", "/")}',
"title": other_data.css(".RwFyvf::text").get(),
"price": other_data.css(".YMlKec::text").get(),
"price_change": other_data.css("[jsname=Fe7oBc]::attr(aria-label)").get(),
# https://regex101.com/r/BOFBlt/1
# Up by 100.99% -> 100.99%
"price_change_formatted": re.search(r"\d{1}%|\d{1,10}\.\d{1,2}%", other_data.css("[jsname=Fe7oBc]::attr(aria-label)").get()).group()
}
scrape_google_finance(ticker="GOOGL:NASDAQ")
DIY Explanation on Extracting Ticker Data
Import libraries:
import requests, json, re
from parsel import Selector
from itertools import zip_longest # https://docs.python.org/3/library/itertools.html#itertools.zip_longest
Library | Purpose |
---|---|
requests |
to make a request to the website. |
json |
to convert extracted data to a JSON object. |
re |
to extract parts of the data via regular expression. |
parsel |
to parse data from HTML/XML documents. Similar to BeautifulSoup . |
zip_longest |
to iterate over several iterables in parallel. More on that below. |
Define a function:
def scrape_google_finance(ticker: str): # ticker should be a string
# further code...
scrape_google_finance(ticker="GOOGL:NASDAQ")
Create request headers and URL parameters:
# https://docs.python-requests.org/en/master/user/quickstart/#passing-parameters-in-urls
params = {
"hl": "en" # language
}
# https://docs.python-requests.org/en/master/user/quickstart/#custom-headers
# https://www.whatismybrowser.com/detect/what-is-my-user-agent
headers = {
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.60 Safari/537.36",
}
Library | Purpose |
---|---|
params |
a prettier way of passing URL parameters to a request. |
user-agent |
to act as a "real" user request from the browser by passing it to request headers. Check what's your user-agent . |
Pass requests parameters and request headers, make a request and pass response to parsel
:
html = requests.get(f"https://www.google.com/finance/quote/{ticker}", params=params, headers=headers, timeout=30)
selector = Selector(text=html.text)
Code | Explanation |
---|---|
f"https://www.google.com/finance/quote/{ticker}" |
is a f-string where {ticker} will be replaced by actual ticker string e.g. "GOOGL:NASDAQ" . |
timeout=30 |
to stop waiting for response after 30 secods. |
Selector(text=html.text) |
where passed HTML from the response will be processed by parsel . |
Create an empty dictionary structure where all the data will be filled in:
# where all extracted data will be temporarily located
ticker_data = {
"ticker_data": {},
"about_panel": {},
"news": {"items": []},
"finance_perfomance": {"table": []},
"people_also_search_for": {"items": []},
"interested_in": {"items": []}
}
Extarcting current price, quote and title data:
# current price, quote, title extraction
ticker_data["ticker_data"]["current_price"] = selector.css(".AHmHk .fxKbKc::text").get()
ticker_data["ticker_data"]["quote"] = selector.css(".PdOqHc::text").get().replace(" • ",":")
ticker_data["ticker_data"]["title"] = selector.css(".zzDege::text").get()
Code | Explanation |
---|---|
ticker_data["ticker_data"]["current_price"] |
accesses ["ticker_data"] key and creates a new key ["current_price"] and assigns it to whatever value would be extracted by parsel . Same for new ["quote"] and ["title"] keys. |
::text |
is a parsel own pseudo-element support which will translate every CSS query to XPath. In this case ::text would become /text() . |
get() |
to get actual data. |
replace(" • ",":") |
to replace someting old with something new. |
Extracting right panel data:
about_panel_keys = selector.css(".gyFHrc .mfs7Fc::text").getall()
about_panel_values = selector.css(".gyFHrc .P6K39c").xpath("normalize-space()").getall()
for key, value in zip_longest(about_panel_keys, about_panel_values):
key_value = key.lower().replace(" ", "_")
ticker_data["about_panel"][key_value] = value
Code | Explanation |
---|---|
getall() |
to get all a list of matches. |
xpath("normalize-space()") |
to get blank text nodes as well. By default, blank text nodes will be skippet resulting not a complete output. |
lower() |
to lowercase all string characters. |
zip_longest() |
to combine multiple iterators. Difference between zip() and zip_longest() is that zip() ends at the shortest iterator while zip_longest() iterates up to the length of the longest iterator. |
[key_value] |
will dynamically add a key to a dictionary with it's own, extracted value. |
Extracting description and extensions data from the right panel:
# description "about" and extensions extraction
ticker_data["about_panel"]["description"] = selector.css(".bLLb2d::text").get()
ticker_data["about_panel"]["extensions"] = selector.css(".w2tnNd::text").getall()
Extracting news results:
# news extarction
if selector.css(".yY3Lee").get():
for index, news in enumerate(selector.css(".yY3Lee"), start=1):
ticker_data["news"]["items"].append({
"position": index,
"title": news.css(".Yfwt5::text").get(),
"link": news.css(".z4rs2b a::attr(href)").get(),
"source": news.css(".sfyJob::text").get(),
"published": news.css(".Adak::text").get(),
"thumbnail": news.css("img.Z4idke::attr(src)").get()
})
else:
ticker_data["news"]["error"] = f"No news result from a {ticker}."
Code | Explanation |
---|---|
if selector.css(".yY3Lee").get() |
to check if news results is present. No need to check if <element> is not None . |
enumerate() |
to add a counter to an iterable and return it. start=1 will start counting from 1, instead from the default value of 0. |
ticker_data["news"].append({}) |
to append extracted data to a list as dictionary. |
::attr(src) |
is also a parsel pseudo-element support to get src attribute from the node. Equivalent to XPath /@src . |
ticker_data["news"]["error"] |
to create a new "error" key and a message when the error occurs. |
Extracting Financial Perfomance table data:
# finance perfomance table
# checks if finance table exists
if selector.css(".slpEwd .roXhBd").get():
fin_perf_col_2 = selector.css(".PFjsMe+ .yNnsfe::text").get() # e.g. Dec 2021
fin_perf_col_3 = selector.css(".PFjsMe~ .yNnsfe+ .yNnsfe::text").get() # e.g. Year/year change
for fin_perf in selector.css(".slpEwd .roXhBd"):
if fin_perf.css(".J9Jhg::text , .jU4VAc::text").get():
"""
if fin_perf.css().get() statement is needed, otherwise first dict key and sub dict values would be None:
"finance_perfomance": {
"table": [
{
"null": {
"Dec 2021": null,
"Year/year change": null
}
}
"""
perf_key = fin_perf.css(".J9Jhg::text , .jU4VAc::text").get() # e.g. Revenue, Net Income, Operating Income..
perf_value_col_1 = fin_perf.css(".QXDnM::text").get() # 60.3B, 26.40%..
perf_value_col_2 = fin_perf.css(".gEUVJe .JwB6zf::text").get() # 2.39%, -21.22%..
ticker_data["finance_perfomance"]["table"].append({
perf_key: {
fin_perf_col_2: perf_value_col_1, # dynamically add key and value from the second (2) column
fin_perf_col_3: perf_value_col_2 # dynamically add key and value from the third (3) column
}
})
else:
ticker_data["finance_perfomance"]["error"] = f"No 'finence perfomance table' for {ticker}."
Extracting you may be "interested in"
/"people also search for"
results:
# "you may be interested in" results
if selector.css(".HDXgAf .tOzDHb").get():
for index, other_interests in enumerate(selector.css(".HDXgAf .tOzDHb"), start=1):
ticker_data["interested_in"]["items"].append(discover_more_tickers(index, other_interests))
else:
ticker_data["interested_in"]["error"] = f"No 'you may be interested in` results for {ticker}"
# "people also search for" results
if selector.css(".HDXgAf+ div .tOzDHb").get():
for index, other_tickers in enumerate(selector.css(".HDXgAf+ div .tOzDHb"), start=1):
ticker_data["people_also_search_for"]["items"].append(discover_more_tickers(index, other_tickers))
else:
ticker_data["people_also_search_for"]["error"] = f"No 'people_also_search_for` in results for {ticker}"
# ....
def discover_more_tickers(index: int, other_data: str):
"""
if price_change_formatted will start complaining,
check beforehand for None values with try/except or if statement and set it to 0.
however, re.search(r"\d{1}%|\d{1,10}\.\d{1,2}%" should get the job done.
"""
return {
"position": index,
"ticker": other_data.css(".COaKTb::text").get(),
"ticker_link": f'https://www.google.com/finance{other_data.attrib["href"].replace("./", "/")}',
"title": other_data.css(".RwFyvf::text").get(),
"price": other_data.css(".YMlKec::text").get(),
"price_change": other_data.css("[jsname=Fe7oBc]::attr(aria-label)").get(),
# https://regex101.com/r/BOFBlt/1
# Up by 100.99% -> 100.99%
"price_change_formatted": re.search(r"\d{1}%|\d{1,10}\.\d{1,2}%", other_data.css("[jsname=Fe7oBc]::attr(aria-label)").get()).group()
}
Code | Explanation |
---|---|
discover_more_tickers() |
created function used to combine two identical code into single function. This way, code needs to be changed in one place only. |
attrib["attribute_name"] |
to get a node attribute. |
[jsname=Fe7oBc] |
is a CSS selector that used to select elements with the specified attribute and value e.g. [attribute=value] . |
re.search() |
to match parts of the string and grab only digits and % values. And group() to return matched string by a regular expression. |
Return and print the data:
# def scrape_google_finance(ticker: str):
# ticker_data = {
# "ticker_data": {},
# "about_panel": {},
# "news": {"items": []},
# "finance_perfomance": {"table": []},
# "people_also_search_for": {"items": []},
# "interested_in": {"items": []}
# }
# extraction code...
return ticker_data
print(json.dumps(data_1, indent=2, ensure_ascii=False))
Full output:
{
"ticker_data": {
"current_price": "$2,665.75",
"quote": "GOOGL:NASDAQ",
"title": "Alphabet Inc Class A"
},
"about_panel": {
"previous_close": "$2,717.77",
"day_range": "$2,659.31 - $2,713.40",
"year_range": "$2,193.62 - $3,030.93",
"market_cap": "1.80T USD",
"volume": "1.56M",
"p/e_ratio": "23.76",
"dividend_yield": "-",
"primary_exchange": "NASDAQ",
"ceo": "Sundar Pichai",
"founded": "Oct 2, 2015",
"headquarters": "Mountain View, CaliforniaUnited States",
"website": "abc.xyz",
"employees": "156,500",
"description": "Alphabet Inc. is an American multinational technology conglomerate holding company headquartered in Mountain View, California. It was created through a restructuring of Google on October 2, 2015, and became the parent company of Google and several former Google subsidiaries. The two co-founders of Google remained as controlling shareholders, board members, and employees at Alphabet. Alphabet is the world's third-largest technology company by revenue and one of the world's most valuable companies. It is one of the Big Five American information technology companies, alongside Amazon, Apple, Meta and Microsoft.\nThe establishment of Alphabet Inc. was prompted by a desire to make the core Google business \"cleaner and more accountable\" while allowing greater autonomy to group companies that operate in businesses other than Internet services. Founders Larry Page and Sergey Brin announced their resignation from their executive posts in December 2019, with the CEO role to be filled by Sundar Pichai, also the CEO of Google. Page and Brin remain co-founders, employees, board members, and controlling shareholders of Alphabet Inc. ",
"extensions": [
"Stock",
"US listed security",
"US headquartered"
]
},
"news": [
{
"position": 1,
"title": "Amazon Splitting Stock, Alphabet Too. Which Joins the Dow First?",
"link": "https://www.barrons.com/articles/amazon-stock-split-dow-jones-51646912881?tesla=y",
"source": "Barron's",
"published": "1 month ago",
"thumbnail": "https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcRlf6wb63KP9lMPsOheYDvvANIfevHp17lzZ-Y0d0aQO1-pRCIDX8POXGtZBQk"
},
{
"position": 2,
"title": "Alphabet's quantum tech group Sandbox spins off into an independent company",
"link": "https://www.cnbc.com/2022/03/22/alphabets-quantum-tech-group-sandbox-spins-off-into-an-independent-company.html",
"source": "CNBC",
"published": "2 weeks ago",
"thumbnail": "https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSIyv1WZJgDvwtMW8e3RAs9ImXtTZSmo2rfmCKIASk4B_XofZfZ8AbDLAMolhk"
},
{
"position": 3,
"title": "Cash-Rich Berkshire Hathaway, Apple, and Alphabet Should Gain From Higher \nRates",
"link": "https://www.barrons.com/articles/cash-rich-berkshire-hathaway-apple-and-alphabet-should-gain-from-higher-rates-51647614268",
"source": "Barron's",
"published": "3 weeks ago",
"thumbnail": "https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcSZ6dJ9h9vXlKrWlTmHiHxlfYVbViP5DAr9a_xV4LhNUOaNS01RuPmt-5sjh4c"
},
{
"position": 4,
"title": "Amazon's Stock Split Follows Alphabet's. Here's Who's Next.",
"link": "https://www.barrons.com/articles/amazon-stock-split-who-next-51646944161",
"source": "Barron's",
"published": "1 month ago",
"thumbnail": "https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSJGKk2i1kLT_YToKJlJnhWaaj_ujLvhhZ5Obw_suZcu_YyaDD6O_Llsm1aqt8"
},
{
"position": 5,
"title": "Amazon, Alphabet, and 8 Other Beaten-Up Growth Stocks Set to Soar",
"link": "https://www.barrons.com/articles/amazon-stock-growth-buy-51647372422",
"source": "Barron's",
"published": "3 weeks ago",
"thumbnail": "https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcTxotkd3p81U7xhmCTJ6IO0tMf_yVKv3Z40bafvtp9XCyosyB4WAuX7Qt-t7Ds"
},
{
"position": 6,
"title": "Is It Too Late to Buy Alphabet Stock?",
"link": "https://www.fool.com/investing/2022/03/14/is-it-too-late-to-buy-alphabet-stock/",
"source": "The Motley Fool",
"published": "3 weeks ago",
"thumbnail": "https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcQv5D9GFKMNUPvMd91aRvi83p12y91Oau1mh_4FBPj6LCNK3cH1vEZ3_gFU4kI"
}
],
"finance_perfomance": [
{
"Revenue": {
"Dec 2021": "75.32B",
"Year/year change": "32.39%"
}
},
{
"Net income": {
"Dec 2021": "20.64B",
"Year/year change": "35.56%"
}
},
{
"Diluted EPS": {
"Dec 2021": "30.69",
"Year/year change": "37.62%"
}
},
{
"Net profit margin": {
"Dec 2021": "27.40%",
"Year/year change": "2.39%"
}
},
{
"Operating income": {
"Dec 2021": "21.88B",
"Year/year change": "39.83%"
}
},
{
"Net change in cash": {
"Dec 2021": "-2.77B",
"Year/year change": "-143.78%"
}
},
{
"Cash and equivalents": {
"Dec 2021": "20.94B",
"Year/year change": "-20.86%"
}
},
{
"Cost of revenue": {
"Dec 2021": "32.99B",
"Year/year change": "26.49%"
}
}
],
"people_also_search_for": [
{
"position": 1,
"ticker": "GOOG",
"ticker_link": "https://www.google.com/finance/quote/GOOG:NASDAQ",
"title": "Alphabet Inc Class C",
"price": "$2,680.21",
"price_change": "Down by 1.80%",
"price_change_formatted": "1.80%"
}, ... other results
{
"position": 18,
"ticker": "SQ",
"ticker_link": "https://www.google.com/finance/quote/SQ:NYSE",
"title": "Block Inc",
"price": "$123.22",
"price_change": "Down by 2.15%",
"price_change_formatted": "2.15%"
}
],
"interested_in": [
{
"position": 1,
"ticker": "Index",
"ticker_link": "https://www.google.com/finance/quote/.INX:INDEXSP",
"title": "S&P 500",
"price": "4,488.28",
"price_change": "Down by 0.27%",
"price_change_formatted": "0.27%"
}, ... other results
{
"position": 18,
"ticker": "NFLX",
"ticker_link": "https://www.google.com/finance/quote/NFLX:NASDAQ",
"title": "Netflix Inc",
"price": "$355.88",
"price_change": "Down by 1.73%",
"price_change_formatted": "1.73%"
}
]
}
Scrape Multiple Google Finance Tickers Quotes
for ticker in ["DAX:INDEXDB", "GOOGL:NASDAQ", "MSFT:NASDAQ"]:
data = scrape_google_finance(ticker=ticker)
print(json.dumps(data["ticker_data"], indent=2, ensure_ascii=False))
Outputs:
{
"current_price": "14,178.23",
"quote": "DAX:Index",
"title": "DAX PERFORMANCE-INDEX"
}
{
"current_price": "$2,665.75",
"quote": "GOOGL:NASDAQ",
"title": "Alphabet Inc Class A"
}
{
"current_price": "$296.97",
"quote": "MSFT:NASDAQ",
"title": "Microsoft Corporation"
}
DIY Extract Google Finance Chart Time-Series Data
Scraping time-series data is not a particularly good idea so it's better to use a dedicated API to get the job done.
How to find which API Google uses to build time series charts?
We can confirm that Google is using NASDAQ API to get time-series data by simply checking Nasdaq chart with the quote GOOGL
:
In this case, I used Nasdaq Data Link API which has a support for Python, R and Excel. I believe other platforms provide Python integration as well.
I'm assuming that you have already installed a nasdaq-data-link
package but if not here's how you can do it. If you set up a default version of Python:
# WSL
$ pip install nasdaq-data-link
If you don't set up a default version of Python:
# WSL
$ python3.9 -m pip install nasdaq-data-link # change python to your version: python3.X
Get your API key at data.nasdaq.com/account/profile
:
Create a .env
file to store your API key there:
touch .nasdaq_api_key # change the file name to yours
# paste API key inside the created file
DIY Scraping Google Finance Time-Series Data
import nasdaqdatalink
def nasdaq_get_timeseries_data():
nasdaqdatalink.read_key(filename=".nasdaq_api_key")
# print(nasdaqdatalink.ApiConfig.api_key) # prints api key from the .nasdaq_api_key file
timeseries_data = nasdaqdatalink.get("WIKI/GOOGL", collapse="monthly") # not sure what "WIKI" stands for
print(timeseries_data)
nasdaq_get_timeseries_data()
Time-Series Extraction Code Explanation
Code | Explanation |
---|---|
nasdaqdatalink.read_key(filename=".nasdaq_api_key") |
to read your API key. |
".nasdaq_api_key" |
is your .env variable with secret API key. All secret variables (correct me if I'm wrong) starts with a . symbol to showcase it. |
nasdaqdatalink.ApiConfig.api_key |
to test out if your API is being recognized by the nasdaq-data-link package. Example output: 2adA_avd12CXauv_1zxs
|
nasdaqdatalink.get() |
to get the time-series data which is dataset structure. |
Outputs a pandas
DataFrame
object:
Open High Low Close Volume Ex-Dividend Split Ratio Adj. Open Adj. High Adj. Low Adj. Close Adj. Volume
Date
2004-08-31 102.320 103.71 102.16 102.37 4917800.0 0.0 1.0 51.318415 52.015567 51.238167 51.343492 4917800.0
2004-09-30 129.899 132.30 129.00 129.60 13758000.0 0.0 1.0 65.150614 66.354831 64.699722 65.000651 13758000.0
2004-10-31 198.870 199.95 190.60 190.64 42282600.0 0.0 1.0 99.742897 100.284569 95.595093 95.615155 42282600.0
2004-11-30 180.700 183.00 180.25 181.98 15384600.0 0.0 1.0 90.629765 91.783326 90.404069 91.271747 15384600.0
2004-12-31 199.230 199.88 192.56 192.79 15321600.0 0.0 1.0 99.923454 100.249460 96.578127 96.693484 15321600.0
... ... ... ... ... ... ... ... ... ... ... ... ...
2017-11-30 1039.940 1044.14 1030.07 1036.17 2190379.0 0.0 1.0 1039.940000 1044.140000 1030.070000 1036.170000 2190379.0
2017-12-31 1055.490 1058.05 1052.70 1053.40 1156357.0 0.0 1.0 1055.490000 1058.050000 1052.700000 1053.400000 1156357.0
2018-01-31 1183.810 1186.32 1172.10 1182.22 1643877.0 0.0 1.0 1183.810000 1186.320000 1172.100000 1182.220000 1643877.0
2018-02-28 1122.000 1127.65 1103.00 1103.92 2431023.0 0.0 1.0 1122.000000 1127.650000 1103.000000 1103.920000 2431023.0
2018-03-31 1063.900 1064.54 997.62 1006.94 2940957.0 0.0 1.0 1063.900000 1064.540000 997.620000 1006.940000 2940957.0
[164 rows x 12 columns]
As you can see, there are no data about the 2019-2022 years. It's because I'm using the Free version, which is suitable for experimentation and exploration, as Nasdaq saying.
Nasdaq rate limits
Authenticated users | Premium users |
---|---|
300 calls per 10 seconds. | - |
2,000 calls per 10 minutes. | 5,000 calls per 10 minutes. |
limit 50,000 calls per day. | limit 720,000 calls per day. |
Additional Nasdaq API Resources
Resource | Explanation |
---|---|
Times-series parameters | to customize (manipulate) your time-series dataset by adding additional parameters to a request. Transformation of time-series data |
Composing a request with curl |
to easily make a request using curl . |
Available saving formats | to save data in CSV , XML , JSON
|
Data formats | to convert the data into available formats. |
Downloading in bulk | to download all the data in a database in a single call. |
Detailed guide on available methods | to understand how to use data-link-python package in more details. |
data-link-python on GitHub |
to read full documentation. |
quandl-python on GitHub |
What data-link-python is using under the hood. You can find a little bit more documentation here. |
Links
Add a Feature Request💫 or a Bug🐞
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