Question

我的程序是一个基本的网页抓取工具，它将针对给定的卡输入返回价格。但是，我想将从刮板收到的HTML结果转换为float以便对其执行数学运算。目前，我的代码是：

import requests
from bs4 import BeautifulSoup

number = int(input("Enter the amount of cards: "))
card_list = {}
for i in range(number):
    card_names = input("Enter the card name: ")
    set_names = input("Enter the respective card set: ")
    card_list[card_names] = set_names

for card_name, set_name in card_list.items():
    url = "https://www.mtggoldfish.com/price/"+set_name+"/"+card_name+"#paper"
    page = requests.get(url)
    page_content = page.content
    soup = BeautifulSoup(page_content, 'html.parser')
    table = soup.find_all("div", {'class':"price-box-container"})
    for t in table:
        paper = t.find_all("div",{"class":"price-box paper"})
        prices = t.findChildren("div",{"class":"price-box paper"})
        for price in prices:
            print(price.get_text())

通常，它返回类似PAPER 69.78的内容，但是尝试使用prices = prices[1:]剪切“ PAPER”不会返回任何结果。此外，尝试float:prices返回： TypeError: float() argument must be a string or a number, not 'ResultSet'

任何帮助将不胜感激！

Answer 1

import requests
from bs4 import BeautifulSoup

number = int(input("Enter the amount of cards: "))
card_list = {}
for i in range(number):
    card_names = input("Enter the card name: ")
    set_names = input("Enter the respective card set: ")
    card_list[card_names] = set_names

for card_name, set_name in card_list.items():
    url = "https://www.mtggoldfish.com/price/"+set_name+"/"+card_name+"#paper"
    page = requests.get(url)
    page_content = page.content
    soup = BeautifulSoup(page_content, 'html.parser')
    table = soup.find_all("div", {'class':"price-box-container"})
    for t in table:
        paper = t.find_all("div",{"class":"price-box paper"})
        prices = t.findChildren("div",{"class":"price-box paper"})
        price_box_type = prices[0].find("div", class_="price-box-type").get_text(strip=True)
        price_box_price = prices[0].find("div", class_="price-box-price").get_text(strip=True)
        print(f"price-box-type - {price_box_type}")
        print(f"price-box-price - {price_box_price}")

输出：

Enter the amount of cards: 1
Enter the card name: Fiery+Emancipation
Enter the respective card set: Core+Set+2021
price-box-type - PAPER
price-box-price - 9.87

Enter the amount of cards: 1
Enter the card name: Ereboss+Intervention
Enter the respective card set: Theros+Beyond+Death
price-box-type - PAPER
price-box-price - 0.50

Answer 2

import requests
from bs4 import BeautifulSoup

number = int(input("Enter the amount of cards: "))
card_list = {}
for i in range(number):
    card_names = input("Enter the card name: ")
    set_names = input("Enter the respective card set: ")
    card_list[card_names] = set_names

for card_name, set_name in card_list.items():
    url = "https://www.mtggoldfish.com/price/"+set_name+"/"+card_name+"#paper"

    page = requests.get(url)
    page_content = page.content
    soup = BeautifulSoup(page_content, 'html.parser')
    table = soup.find_all("div", {'class':"price-box-container"})
    for t in table:
        paper = t.find_all("div",{"class":"price-box paper"})
        prices = t.findChildren("div",{"class":"price-box paper"})
        price_box_type = prices[0].find("div", class_="price-box- 
type").get_text(strip=True)
        price_box_price = float(prices[0].find("div", class_="price-box- 
price").get_text(strip=True))
        print(f"price-box-price - {price_box_price}")
        print(type(price_box_price)) #just for reference

输出：

Enter the amount of cards: 1
Enter the card name: Baneslayer+Angel
Enter the respective card set: Core+Set+2021
price-box-price - 2.92
<class 'float'>

将HTML结果转换为浮点数

2 个答案: