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python - 如何在soup.find_all中打印“未找到”？

问题描述

在某些行中，我有以下 html 代码：

<span class="price"><span class="woocommerce-Price-amount amount"><span class="woocommerce-Price-currencySymbol">SAR</span>&nbsp;625.00</span> <small class="woocommerce-price-suffix">(Excluding Tax)</small></span>

在某些行中，代码不存在。如果此代码在这些行上不可用，我希望它打印“未找到”

我正在使用以下代码，但无法得到正确答案：

p=soup.findAll("span", {"class":"price"})
for price in p:
  if price in p:
    prices.append(price.text)
  else:
    prices.append("Not found")

有人可以帮我解决这个问题。

标签： pythonweb-scrapingbeautifulsoup

解决方案

搜索每个产品的父元素，在这种情况下<div class="product-inner">，然后搜索价格。如果没有找到价格，则将其设置为"Not found"。

例如：

import requests
from bs4 import BeautifulSoup


url = 'https://www.softland.com.sa/category/brand'
soup = BeautifulSoup(requests.get(url).content, 'html.parser')

for product in soup.find_all('div', class_='product-inner'):
    title = product.h2.text
    price = product.find('span', class_='amount')
    if price:
        price = price.text
    else:
        price = 'Not found'
    print('{:<15} {}'.format(price, title))

印刷：

SAR 350.00      SAMSUNG SSD 860 EVO SATA III 2.5 inch 500 GB-MZ-76E500BW-887276231631
SAR 625.00      Samsung 860 EVO 1TB 2.5 Inch SATA III Internal SSD MZ-76E1T0BW-887276231648
Not found       MSI Z390-A PRO 9th Gen. Motherboard
SAR 75.00       ASUS Internal 24X DVD BURNER Black (DRW-24D5MT)
SAR 2,750.00    Gaming Series #1
SAR 485.00      Samsung 970 Evo Plus M.2-500GB-MZ-V7S500BW-887276302546
SAR 395.00      CoolerMaster MasterBox MB520 Red-Trim
SAR 150.00      Xtrike Wired 4 in 1 Combo with ENG/ARABIC layout -CM-400
SAR 350.00      NZXT  Aer RGB 120 Triple Pack  RGB LED PWM Fan for HUE (RF-AR120-T1)
SAR 895.00      Samsung M.2-970 Evo Plus 1TB-MZ-V7S1T0BW-887276302522
SAR 395.00      TEAM DELTA R BLACK UD-D4 8GBx2 3000
SAR 350.00      Samsung M.2-970 Evo Plus 250GB-MZ-V7S250BW-887276302515
SAR 190.00      TEAM Vulcan Z RED UD-D4 8GB 2666
SAR 125.00      NZXT Aer RGB120 Single Pack 120mm Digitally Controlled RGB LED Fans for HUE (RF-AR120-B1)
SAR 190.00      Gamdias Hermes E2 7 Neon Color Mechanical Gaming Keyboard with Blue Switches (87 Keys)
SAR 560.00      Windows 10 Pro 64-bit Arabic – OEM
SAR 935.00      Corsair Crystal Series 570X RGB ATX Mid-Tower Case RED-CC-9011111-WW
SAR 325.00      BitFenix Prodigy M Window Side Panel Computer Case, Black, BFC-PRM-300-RRWKK-RP, Micro ATX / Mini-ITX
SAR 180.00      DEEPCOOL GAMMAXX 200T CPU AirCooler
SAR 480.00      Corsair Vengeance RGB Pro 16GB (2x8GB) DDR4-3200 CMW16GX4M2E3200C16

编辑：将课程更改product为product-inner.

要将信息作为 pandas DataFrame 获取，您可以使用以下脚本：

import requests
import pandas as pd
from bs4 import BeautifulSoup

url = 'https://www.softland.com.sa/category/brand'
soup = BeautifulSoup(requests.get(url).content, 'html.parser')

all_data = []
for product in soup.find_all('div', class_='product-inner'):
    title = product.h2.text
    price = product.find('span', class_='amount')
    if price:
        price = price.text
    else:
        price = 'Not found'
    all_data.append({'Title': title, 'Price': price})

df = pd.DataFrame(all_data)
print(df)

印刷：

                                                Title         Price
0   SAMSUNG SSD 860 EVO SATA III 2.5 inch 500 GB-M...    SAR 350.00
1   Samsung 860 EVO 1TB 2.5 Inch SATA III Internal...    SAR 625.00
2                 MSI Z390-A PRO 9th Gen. Motherboard     Not found
3     ASUS Internal 24X DVD BURNER Black (DRW-24D5MT)     SAR 75.00
4                                    Gaming Series #1  SAR 2,750.00
5   Samsung 970 Evo Plus M.2-500GB-MZ-V7S500BW-887...    SAR 485.00
6               CoolerMaster MasterBox MB520 Red-Trim    SAR 395.00
7   Xtrike Wired 4 in 1 Combo with ENG/ARABIC layo...    SAR 150.00
8   NZXT  Aer RGB 120 Triple Pack  RGB LED PWM Fan...    SAR 350.00
9   Samsung M.2-970 Evo Plus 1TB-MZ-V7S1T0BW-88727...    SAR 895.00
10                TEAM DELTA R BLACK UD-D4 8GBx2 3000    SAR 395.00
11  Samsung M.2-970 Evo Plus 250GB-MZ-V7S250BW-887...    SAR 350.00
12                   TEAM Vulcan Z RED UD-D4 8GB 2666    SAR 190.00
13  NZXT Aer RGB120 Single Pack 120mm Digitally Co...    SAR 125.00
14  Gamdias Hermes E2 7 Neon Color Mechanical Gami...    SAR 190.00
15                 Windows 10 Pro 64-bit Arabic – OEM    SAR 560.00
16  Corsair Crystal Series 570X RGB ATX Mid-Tower ...    SAR 935.00
17  BitFenix Prodigy M Window Side Panel Computer ...    SAR 325.00
18                DEEPCOOL GAMMAXX 200T CPU AirCooler    SAR 180.00
19  Corsair Vengeance RGB Pro 16GB (2x8GB) DDR4-32...    SAR 480.00

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