Module cmc.modules.cryptocurrency.losers
Module for fetching data of Cryptocurrencies which were the top losers in the last 24 hours on CoinMarketCap website.
Expand source code
#!/usr/bin/env python
"""Module for fetching data of Cryptocurrencies which were the top losers
in the last 24 hours on CoinMarketCap website."""
from datetime import datetime
import os
import time
from typing import Any, Dict, List, Optional, Union
import bs4
from bs4 import BeautifulSoup
from selenium import webdriver
from selenium.webdriver.common.by import By
from cmc.modules.base import CMCBaseClass
from cmc.utils.exceptions import ScrapeError
from cmc.utils.models import TopLosersData
class TopLosers(CMCBaseClass):
"""Class for scraping the data of CryptoCurrencies that appear
in the top losers table."""
def __init__(self, proxy: Optional[str] = None, as_dict: bool = False) -> None:
"""
Args:
proxy (Optional[str], optional): Proxy to be used for Selenium and requests Session. Defaults to None.
as_dict (bool): Return the data as a dictionary. Defaults to False.
"""
super().__init__(proxy)
self.base_url = "https://coinmarketcap.com/gainers-losers/"
self.out = as_dict
@property
def __get_page_data(self) -> bs4.BeautifulSoup:
"""Scrape the losers table from gainers-losers page data
and return the scraped data.
Raises:
ScrapeError: Raised when data cannot be scraped from the webpage.
Returns:
bs4.BeautifulSoup: Scraped page data.
"""
driver = webdriver.Chrome(
service=self.service,
options=self.driver_options,
service_log_path=os.devnull,
)
try:
driver.get(self.base_url)
driver.execute_script("window.scrollTo(0, document.body.scrollHeight)")
time.sleep(1)
result = driver.find_element(
By.XPATH,
'//*[@id="__next"]/div/div[1]/div[2]/div/div[2]/div/div[2]/div/table/tbody',
)
page_data = result.get_attribute("innerHTML")
driver.quit()
soup = BeautifulSoup(page_data, features="lxml")
return soup
except:
raise ScrapeError
@property
def get_data(self) -> Union[Dict[int, Dict[str, Any]], Dict[int, TopLosersData]]:
"""Scrape the CryptoCurrencies which are the top losers in the
last 24 hours.
Returns:
Union[Dict[int, Dict[str, Any]], Dict[int, TopLosersData]]: Scraped data of top losing CryptoCurrencies.
"""
top_losers: Dict[int, Any] = {}
page_data = self.__get_page_data
data = page_data.find_all("tr")
for num, content in enumerate(data):
td = content.find_all("td")
name: str = td[1].find("p", class_="sc-1eb5slv-0 iworPT").text
symbol: str = (
td[1].find("p", class_="sc-1eb5slv-0 gGIpIK coin-item-symbol").text
)
rank: str = td[0].find("p", class_="sc-1eb5slv-0 bSDVZJ").text
cmc_link: str = td[1].find("a", class_="cmc-link")["href"]
price: str = td[2].span.text
percentage: str = td[3].find("span", class_="sc-15yy2pl-0 hzgCfk").text
volume_24h: str = td[4].text
result = {
"name": name,
"symbol": symbol,
"rank": rank,
"cmc_name": cmc_link.split("/")[-2],
"url": self.cmc_url + cmc_link,
"price": price,
"percentage": percentage,
"volume_24h": volume_24h,
"timestamp": datetime.now(),
}
if self.out:
top_losers[num + 1] = result
else:
top_losers[num + 1] = TopLosersData(**result)
return top_losersClasses
class TopLosers (proxy: Optional[str] = None, as_dict: bool = False)-
Class for scraping the data of CryptoCurrencies that appear in the top losers table.
Args
proxy:Optional[str], optional- Proxy to be used for Selenium and requests Session. Defaults to None.
as_dict:bool- Return the data as a dictionary. Defaults to False.
Expand source code
class TopLosers(CMCBaseClass): """Class for scraping the data of CryptoCurrencies that appear in the top losers table.""" def __init__(self, proxy: Optional[str] = None, as_dict: bool = False) -> None: """ Args: proxy (Optional[str], optional): Proxy to be used for Selenium and requests Session. Defaults to None. as_dict (bool): Return the data as a dictionary. Defaults to False. """ super().__init__(proxy) self.base_url = "https://coinmarketcap.com/gainers-losers/" self.out = as_dict @property def __get_page_data(self) -> bs4.BeautifulSoup: """Scrape the losers table from gainers-losers page data and return the scraped data. Raises: ScrapeError: Raised when data cannot be scraped from the webpage. Returns: bs4.BeautifulSoup: Scraped page data. """ driver = webdriver.Chrome( service=self.service, options=self.driver_options, service_log_path=os.devnull, ) try: driver.get(self.base_url) driver.execute_script("window.scrollTo(0, document.body.scrollHeight)") time.sleep(1) result = driver.find_element( By.XPATH, '//*[@id="__next"]/div/div[1]/div[2]/div/div[2]/div/div[2]/div/table/tbody', ) page_data = result.get_attribute("innerHTML") driver.quit() soup = BeautifulSoup(page_data, features="lxml") return soup except: raise ScrapeError @property def get_data(self) -> Union[Dict[int, Dict[str, Any]], Dict[int, TopLosersData]]: """Scrape the CryptoCurrencies which are the top losers in the last 24 hours. Returns: Union[Dict[int, Dict[str, Any]], Dict[int, TopLosersData]]: Scraped data of top losing CryptoCurrencies. """ top_losers: Dict[int, Any] = {} page_data = self.__get_page_data data = page_data.find_all("tr") for num, content in enumerate(data): td = content.find_all("td") name: str = td[1].find("p", class_="sc-1eb5slv-0 iworPT").text symbol: str = ( td[1].find("p", class_="sc-1eb5slv-0 gGIpIK coin-item-symbol").text ) rank: str = td[0].find("p", class_="sc-1eb5slv-0 bSDVZJ").text cmc_link: str = td[1].find("a", class_="cmc-link")["href"] price: str = td[2].span.text percentage: str = td[3].find("span", class_="sc-15yy2pl-0 hzgCfk").text volume_24h: str = td[4].text result = { "name": name, "symbol": symbol, "rank": rank, "cmc_name": cmc_link.split("/")[-2], "url": self.cmc_url + cmc_link, "price": price, "percentage": percentage, "volume_24h": volume_24h, "timestamp": datetime.now(), } if self.out: top_losers[num + 1] = result else: top_losers[num + 1] = TopLosersData(**result) return top_losersAncestors
Instance variables
var get_data : Union[Dict[int, Dict[str, Any]], Dict[int, TopLosersData]]-
Scrape the CryptoCurrencies which are the top losers in the last 24 hours.
Returns
Union[Dict[int, Dict[str, Any]], Dict[int, TopLosersData]]- Scraped data of top losing CryptoCurrencies.
Expand source code
@property def get_data(self) -> Union[Dict[int, Dict[str, Any]], Dict[int, TopLosersData]]: """Scrape the CryptoCurrencies which are the top losers in the last 24 hours. Returns: Union[Dict[int, Dict[str, Any]], Dict[int, TopLosersData]]: Scraped data of top losing CryptoCurrencies. """ top_losers: Dict[int, Any] = {} page_data = self.__get_page_data data = page_data.find_all("tr") for num, content in enumerate(data): td = content.find_all("td") name: str = td[1].find("p", class_="sc-1eb5slv-0 iworPT").text symbol: str = ( td[1].find("p", class_="sc-1eb5slv-0 gGIpIK coin-item-symbol").text ) rank: str = td[0].find("p", class_="sc-1eb5slv-0 bSDVZJ").text cmc_link: str = td[1].find("a", class_="cmc-link")["href"] price: str = td[2].span.text percentage: str = td[3].find("span", class_="sc-15yy2pl-0 hzgCfk").text volume_24h: str = td[4].text result = { "name": name, "symbol": symbol, "rank": rank, "cmc_name": cmc_link.split("/")[-2], "url": self.cmc_url + cmc_link, "price": price, "percentage": percentage, "volume_24h": volume_24h, "timestamp": datetime.now(), } if self.out: top_losers[num + 1] = result else: top_losers[num + 1] = TopLosersData(**result) return top_losers