Python-网络抓取，函数中的for循环不起作用

Question

我正在研究 python-web scraping，我想制作一个函数自动抓取 webtoons 的速率。 我认为这是一项非常简单的工作，但是'score' 函数中的 for 循环不起作用。 但是我注释掉的最后三个 for 循环可以正常工作。 如何修复'score'功能？？？

import requests
from bs4 import BeautifulSoup

url = "https://comic.naver.com/webtoon/list?titleId=183559&weekday=mon"
res = requests.get(url)
res.raise_for_status()

soup = BeautifulSoup(res.text, "lxml")
# scraping rates
cartoons_1 = soup.find_all("div", attrs={"class":"rating_type"})
total_rates = 0
def score(cartoons):
    global total_rates
    for cartoon in cartoons:
        rate = cartoon.find("strong").get_text()
        print(rate)
        total_rates = total_rates + float(rate)
        return total_rates
total_rates = score(cartoons_1)
print("average rates: ", total_rates/len(cartoons_1))
# for cartoon in cartoons_1:
#     rate = cartoon.find("strong").get_text()
#     print(rate)

预期结果是 9.91 9.83 9.89 9.89 9.78 9.89 9.90 9.81 9.90 9.85 平均费率：9.865

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但结果是 9.91 平均费率：0.991

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函数中的 For 循环不起作用。

Answer 1

您定义了cartoons_1，但没有定义cartoons。我认为您正在尝试做的是：

import requests
from bs4 import BeautifulSoup

url = "https://comic.naver.com/webtoon/list?titleId=183559&weekday=mon"
res = requests.get(url)
res.raise_for_status()

soup = BeautifulSoup(res.text, "lxml")
# scrapping rates
cartoons_1 = soup.find_all("div", attrs={"class":"rating_type"})
total_rates = 0
def score(cartoons):
    global total_rates
    for cartoon in cartoons:
        rate = cartoon.find("strong").get_text()
        print(cartoon)
        print(rate)
        total_rates = total_rates + float(rate)
        return total_rates
total_rates = score(cartoons_1)
print("total rates: ", total_rates)
print("average rates: ", total_rates/len(cartoons_1))
for cartoon in cartoons_1:
    rate = cartoon.find("strong").get_text()
    print(rate)