使用 BeautifulSoup 在网站上查找特定值

Question

我正在制作一个检查 DogeCoin 价格的 discord 机器人，为此我决定使用 BeautifulSoup 来检查本网站上的价格（包括货币，在本例中为欧元） : https://www.tradingview.com/symbols/DOGEEUR/?exchange=BINANCE 。我想要得到的价格紧接在 DOGECOIN/EURO [binance symbol] BINANCE

下面

不过我是 BeautifulSoup 的新手，对 Python 有非常基础的知识和经验，所以这对我来说是一个很大的挑战。

有没有办法将硬币 + EUR 的值存储到字符串变量中？

我尝试使用以下代码作为参考，但即使使用教程我也无法获得任何结果。

def get_crypto_price(coin):
    #Get the URL
    url = "https://www.google.com/search?q="+coin+"+price"
    
    #Make a request to the website
    HTML = requests.get(url) 
  
    #Parse the HTML
    soup = BeautifulSoup(HTML.text, 'html.parser') 
  
    #Find the current price 
    #text = soup.find("div", attrs={'class':'BNeawe iBp4i AP7Wnd'}).text
    text = soup.find("div", attrs={'class':'BNeawe iBp4i AP7Wnd'}).find("div", attrs={'class':'BNeawe iBp4i AP7Wnd'}).text

#Return the text 
    return text

#Create a main function to consistently show the price of the cryptocurrency
def main():
  #Set the last price to negative one
  last_price = -1
  #Create an infinite loop to continuously show the price
  while True:
    #Choose the cryptocurrency that you want to get the price of (e.g. bitcoin, litecoin)
    crypto = 'bitcoin' 
    #Get the price of the crypto currency
    price = get_crypto_price()
    #Check if the price changed
    if price != last_price:
      last_price = price #Update the last price
      return price
    time.sleep(3) #Suspend execution for 3 seconds.

Answer 1

调用函数时需要传递加密名称。

crypto = 'bitcoin' 
#Get the price of the crypto currency
price = get_crypto_price(crypto)

请更新 return 价格“32,46,044.24 印度卢比”

并且因为您正在将它与您需要执行操作以从中获取数字的数字进行比较。

price = float(price.replace(",","").split()[0])

这会return你的价格是：3255838.53

Answer 2

此处记录的价格似乎 public API：https://github.com/binance/binance-spot-api-docs/blob/master/rest-api.md#general-api-information

从所有（较少请求）中获取特定项目的示例：

import requests

def get_price(symbol, prices):
    for price in prices:
        if symbol == price['symbol']:
            return price['price']
        
prices = requests.get('https://api.binance.com/api/v3/ticker/price').json()
print(get_price('DOGEEUR', prices))

根据文档，有一个符号参数允许检索单个代码的最新价格。

编辑：@Mike Malyi 正确地指出 [如果只对单个项目感兴趣）-

Better to add a symbol as a query

https://api.binance.com/api/v3/ticker/price?symbol=DOGETH

it will save binance weight points, and reduce the size of the request.

使用 BeautifulSoup 在网站上查找特定值

Using BeautifulSoup to find a specific value on a website

python

beautifulsoup

binance