我想弄清楚如何正確地將幾個值附加到串列中。我正在抓取的網頁是一個美食博客。我想檢索食譜的標題以及與該特定食譜相關的所有食譜鍵（無麩質、純素食、無乳制品、素食等）。我可以從頁面中檢索資訊，但我遇到的問題是將幾個配方鍵附加到串列的一行中，所以如果頁面上的第一個配方不含乳制品和麩質，我不是能夠附加它們，使它們與相應配方的行相匹配。我正在分享我的一段代碼，以便您可以看到我正在使用的內容。提前感謝幫助。
recipe = []
key = []
for page in pages:
page = requests.get('https://www.skinnytaste.com/page/' str(page) '/')
soup = BeautifulSoup(page.text, 'html.parser')
recipes = soup.find_all('article', class_='post teaser-post odd')
recipes.extend(soup.find_all('article', class_='post teaser-post even'))
sleep(randint(2, 8))
for r in recipes:
titles = r.h2.text
recipe.append(titles)
print(titles)
post_meta = r.find('div', class_='post-meta')
icons = post_meta.find('div', class_='icons')
if not (post_meta.find('div', class_='icons') is None):
keys = icons.find_all('span')
for k in keys:
recipe_key = k.find('a').find('img').get('alt')
key.append(recipe_key)
print(recipe_key)
uj5u.com熱心網友回復：
初始化一個名為 的空串列rows。然后為 each 創建一個字典，row動態更新字典，因為有些食譜比其他食譜有更多的“鍵”。然后將該字典附加row到您的rows. 然后熊貓可以使用它來構建表格。
import requests
import pandas as pd
from bs4 import BeautifulSoup
from time import sleep
from random import randint
headers = {'user-agent': 'Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.45 Mobile Safari/537.36'}
rows = []
pages = range(1,5)
for page in pages:
response = requests.get('https://www.skinnytaste.com/page/' str(page) '/', headers=headers)
soup = BeautifulSoup(response.text, 'html.parser')
recipes = soup.find_all('article', class_='post teaser-post odd')
recipes.extend(soup.find_all('article', class_='post teaser-post even'))
sleep(randint(2, 8))
for r in recipes:
titles = r.h2.text
print(titles)
row = {'Title':titles}
post_meta = r.find('div', class_='post-meta')
icons = post_meta.find('div', class_='icons')
if not (post_meta.find('div', class_='icons') is None):
keys = icons.find_all('span')
for count, k in enumerate(keys, start=1):
recipe_key = k.find('a').find('img').get('alt')
row.update({'key_%.2d' %count: recipe_key})
print(recipe_key)
rows.append(row)
results = pd.DataFrame(rows)
輸出：
print(results.to_string())
Title key_01 key_02 key_03 key_04 key_05 key_06 key_07
0 Baked Pumpkin Pasta with Pancetta, Gruyere, Kale, and White Beans Gluten Free NaN NaN NaN NaN NaN NaN
1 Mom’s Stuffing, Lightened Up NaN NaN NaN NaN NaN NaN NaN
2 Roasted Green Beans with Caramelized Onions Dairy Free Gluten Free Vegetarian Meals Whole 30 Recipes NaN NaN NaN
3 7 Day Healthy Meal Plan (November 22-28) NaN NaN NaN NaN NaN NaN NaN
4 Makeover Spinach Gratin Gluten Free Kid Friendly Low Carb Vegetarian Meals NaN NaN NaN
5 Turkey Pot Pie with Sweet Potato Topping Gluten Free Kid Friendly NaN NaN NaN NaN NaN
6 Sautéed Shredded Brussels Sprouts with Pancetta Dairy Free Gluten Free Keto Recipes Kid Friendly Low Carb Paleo Under 30 Minutes
7 Baked Brie Phyllo Cups with Craisins and Walnuts Under 30 Minutes Vegetarian Meals NaN NaN NaN NaN NaN
8 Chicken Cassoulet with Sausage and Swiss Chard Dairy Free Freezer Meals Gluten Free NaN NaN NaN NaN
9 Drunken Style Noodles with Shrimp Dairy Free Gluten Free NaN NaN NaN NaN NaN
10 Chicken and Broccoli Noodle Casserole Kid Friendly NaN NaN NaN NaN NaN NaN
11 Arugula Salmon Salad with Capers and Shaved Parmesan Gluten Free Keto Recipes Low Carb Under 30 Minutes NaN NaN NaN
12 Roasted Acorn Squash with Brown Sugar Dairy Free Gluten Free Vegetarian Meals NaN NaN NaN NaN
13 Turkey Cutlets with Parmesan Crust Kid Friendly Under 30 Minutes NaN NaN NaN NaN NaN
14 Butternut Squash Ravioli with Sage Butter Vegetarian Meals NaN NaN NaN NaN NaN NaN
15 Air Fryer Chicken Milanese with Mediterranean Salad Air Fryer Gluten Free Under 30 Minutes NaN NaN NaN NaN
16 Salisbury Steak with Mushroom Gravy Dairy Free Freezer Meals Kid Friendly Low Carb Under 30 Minutes NaN NaN
17 Huevos Rancheros Gluten Free Under 30 Minutes Vegetarian Meals NaN NaN NaN NaN
18 Easy Black Bean Vegetarian Chili with Spiced Yogurt Gluten Free Kid Friendly Under 30 Minutes Vegetarian Meals NaN NaN NaN
19 Apple Cobbler Vegetarian Meals NaN NaN NaN NaN NaN NaN
20 Tofu Stir Fry with Vegetables in a Soy Sesame Sauce Dairy Free Gluten Free Under 30 Minutes Vegetarian Meals NaN NaN NaN
21 Autumn Apple and Grape Medley (Fruit Salad) Gluten Free Kid Friendly Under 30 Minutes Vegetarian Meals NaN NaN NaN
22 Chicken Cutlet Caprese Salad Gluten Free Meal Prep Recipes NaN NaN NaN NaN NaN
23 Beef Stew with Pumpkin Dairy Free Freezer Meals Kid Friendly Pressure Cooker Recipes Slow Cooker Recipes NaN NaN
24 Pumpkin Cream Cheese Muffins Freezer Meals Kid Friendly Vegetarian Meals NaN NaN NaN NaN
25 Pumpkin Pie Overnight Oats Dairy Free Gluten Free Kid Friendly Vegetarian Meals NaN NaN NaN
26 Strawberry Cheesecake Dip Gluten Free Kid Friendly Under 30 Minutes NaN NaN NaN NaN
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