需要帮助来抓取网页
需要帮助来抓取网页
提问于 2020-12-20 19:49:18
我开始了一个迷你项目，我想检索硬币名称，价格，硬币市值，流通供应和第一页前100枚硬币的数量。到目前为止，(在问了几个问题并得到了很好的输入之后)我能够检索到第一页上的所有硬币名称。然而，对于价格，我只能得到前11个名字，而硬币市值我什么也得不到。我真的很想收集数据，这样我就可以开始做一些数据分析了，但我总是碰壁。谁能再给我指个方向？？我知道有一个api，但我想扩展我的知识。
import requests
from lxml import html
from selenium import webdriver
url = "https://coinmarketcap.com/"
driver = webdriver.Chrome()
driver.get(url)
coin_name = [name.text for name in driver.find_elements_by_xpath('//td[3]/a[@class="cmc-link" and starts-with(@href, "/currencies/")]')]
print(coin_name)
print(len(coin_name))
price = [p.text for p in driver.find_elements_by_xpath('//td[4]/div/a[@class = "cmc-link" and contains(@href, "/markets/")]')]
print(price)
print(len(price))
market_cap = [m.text for m in driver.find_elements_by_xpath('//p[@class = "cmc-link" and contains(@style, "white-space:nowrap")]//p[@color="text"]')]
print(len(market_cap))回答 1
Stack Overflow用户
回答已采纳
发布于 2020-12-20 20:32:58
需要将图元滚动到视图中。只要继续向下发送页面就行了。
import time
import requests
from lxml import html
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
url = "https://coinmarketcap.com/"
driver = webdriver.Chrome(executable_path='C:/chromedriver.exe')
driver.get(url)
driver.maximize_window()
for i in range(22):
coin_name = driver.find_elements_by_xpath('//td[3]/a[@class="cmc-link" and starts-with(@href, "/currencies/")]')
prices = driver.find_elements_by_xpath('//td[4]/div/a[@class = "cmc-link" and contains(@href, "/markets/")]')
market_caps = driver.find_elements_by_xpath('//p[@class="sc-1eb5slv-0 kDEzev"]')
html = driver.find_element_by_tag_name('html')
html.send_keys(Keys.PAGE_DOWN)
for coin, price, cap in zip(coin_name, prices, market_caps):
print("Coin :", coin.text, "Price :", price.text, "Market_caps:", cap.text)输出：-
CETH Price : $648.10 Market cap : $435,982,385,626
Coin : XRP
XRP Price : $0.573805 Market cap : $73,825,115,056
Coin : Tether
USDT Price : $1.00 Market cap : $26,053,047,457
Coin : Litecoin
LTC Price : $117.47 Market cap : $20,302,149,320
Coin : Bitcoin Cash
BCH Price : $350.85 Market cap : $7,768,463,654
Coin : Chainlink
LINK Price : $13.34 Market cap : $6,526,170,500
Coin : Cardano
ADA Price : $0.163470 Market cap : $5,300,831,845
Coin : Binance Coin
BNB Price : $34.82 Market cap : $5,085,969,556
Coin : Polkadot
DOT Price : $5.25 Market cap : $5,027,979,819
Coin : Stellar
XLM Price : $0.178429 Market cap : $4,683,566,948页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/65379546
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