如何检查列表是否在列表列表中？

Question

我正在抓取网页中的帖子并将帖子保存到 csv 文件中，并试图防止多次保存同一个帖子。

到目前为止，我可以抓取帖子并保存它们，但我试图将新帖子与我已经保存但失败的帖子进行比较。我的代码是：

import csv
import requests
from bs4 import BeautifulSoup
r = requests.get("https://tpwd.texas.gov/state-parks/ray-roberts-lake/park_events")
page = BeautifulSoup(r.text, "html.parser")
events = page.find("div", "eventlist_month")
tweeted =[]
read = []
tweet = []
tweets = []
with open("C:/Users/Shua/Desktop/output.csv", "r") as f:
    reader = csv.reader(f)
    for row in reader:

        read = row
        tweeted.append(read)
        #print (read)

for tags in events.find_all("div", "vevent event"):
    event_date = tags.find("abbr", "dtstart").text.strip()
    event_title = tags.find("h3").text
    event_local = tags.find("div", "location").text
    event_sum = tags.find("div", "description").text
    event_url = tags.find("a")["href"]
    event_date2 = " ".join(event_date.split())
    tweet = [event_date2+" "+event_title+"\n"+event_sum+"\n"+event_local+" "+event_url]
    result = any(elem in tweet for elem in tweeted)
    print (tweeted)
    print(tweet)
    print(result)
    if result:
        print("saved")
    else:
        print("not save")
    tweets.append(tweet)

输出是

[["Jun 28 Dutch Oven Cookin'\nJoin us for a tasty cooking lesson!\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/dutch-oven-breakfast"], ['Jun 28 Friday Night Frog Talk\nCome see our green, long-legged friends!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/friday-night-frog-talk-8'], ['Jun 28 Wonders of the Night\nJoin a ranger for a night hike to find what goes bump in the night!\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/wonders-of-the-night-2'], ['Jun 29 Guided Nature Hike\nLearn about the local flora and fauna with a Texas Master Naturalist volunteer.\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/master-naturalist-guided-hike-5'], ['Jun 29 Hike with a Ranger!\nHike with a Ranger through Dogwood Canyon.\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/dogwood-canyon-hike-2'], ["Jun 29 Pond Dipping\nLet's explore the pond life!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/pond-dipping"], ['Jun 29 Arts in the Park\nTry your hand at watercolors!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/arts-in-the-park-1']]
["Jun 28 Dutch Oven Cookin'\nJoin us for a tasty cooking lesson!\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/dutch-oven-breakfast"]
False
not save
[["Jun 28 Dutch Oven Cookin'\nJoin us for a tasty cooking lesson!\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/dutch-oven-breakfast"], ['Jun 28 Friday Night Frog Talk\nCome see our green, long-legged friends!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/friday-night-frog-talk-8'], ['Jun 28 Wonders of the Night\nJoin a ranger for a night hike to find what goes bump in the night!\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/wonders-of-the-night-2'], ['Jun 29 Guided Nature Hike\nLearn about the local flora and fauna with a Texas Master Naturalist volunteer.\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/master-naturalist-guided-hike-5'], ['Jun 29 Hike with a Ranger!\nHike with a Ranger through Dogwood Canyon.\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/dogwood-canyon-hike-2'], ["Jun 29 Pond Dipping\nLet's explore the pond life!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/pond-dipping"], ['Jun 29 Arts in the Park\nTry your hand at watercolors!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/arts-in-the-park-1']]
['Jun 28 Friday Night Frog Talk\nCome see our green, long-legged friends!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/friday-night-frog-talk-8']
False
not save
[["Jun 28 Dutch Oven Cookin'\nJoin us for a tasty cooking lesson!\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/dutch-oven-breakfast"], ['Jun 28 Friday Night Frog Talk\nCome see our green, long-legged friends!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/friday-night-frog-talk-8'], ['Jun 28 Wonders of the Night\nJoin a ranger for a night hike to find what goes bump in the night!\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/wonders-of-the-night-2'], ['Jun 29 Guided Nature Hike\nLearn about the local flora and fauna with a Texas Master Naturalist volunteer.\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/master-naturalist-guided-hike-5'], ['Jun 29 Hike with a Ranger!\nHike with a Ranger through Dogwood Canyon.\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/dogwood-canyon-hike-2'], ["Jun 29 Pond Dipping\nLet's explore the pond life!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/pond-dipping"], ['Jun 29 Arts in the Park\nTry your hand at watercolors!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/arts-in-the-park-1']]
['Jun 28 Wonders of the Night\nJoin a ranger for a night hike to find what goes bump in the night!\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/wonders-of-the-night-2']
False
not save
[["Jun 28 Dutch Oven Cookin'\nJoin us for a tasty cooking lesson!\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/dutch-oven-breakfast"], ['Jun 28 Friday Night Frog Talk\nCome see our green, long-legged friends!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/friday-night-frog-talk-8'], ['Jun 28 Wonders of the Night\nJoin a ranger for a night hike to find what goes bump in the night!\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/wonders-of-the-night-2'], ['Jun 29 Guided Nature Hike\nLearn about the local flora and fauna with a Texas Master Naturalist volunteer.\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/master-naturalist-guided-hike-5'], ['Jun 29 Hike with a Ranger!\nHike with a Ranger through Dogwood Canyon.\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/dogwood-canyon-hike-2'], ["Jun 29 Pond Dipping\nLet's explore the pond life!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/pond-dipping"], ['Jun 29 Arts in the Park\nTry your hand at watercolors!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/arts-in-the-park-1']]
['Jun 29 Guided Nature Hike\nLearn about the local flora and fauna with a Texas Master Naturalist volunteer.\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/master-naturalist-guided-hike-5']
False
not save
[["Jun 28 Dutch Oven Cookin'\nJoin us for a tasty cooking lesson!\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/dutch-oven-breakfast"], ['Jun 28 Friday Night Frog Talk\nCome see our green, long-legged friends!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/friday-night-frog-talk-8'], ['Jun 28 Wonders of the Night\nJoin a ranger for a night hike to find what goes bump in the night!\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/wonders-of-the-night-2'], ['Jun 29 Guided Nature Hike\nLearn about the local flora and fauna with a Texas Master Naturalist volunteer.\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/master-naturalist-guided-hike-5'], ['Jun 29 Hike with a Ranger!\nHike with a Ranger through Dogwood Canyon.\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/dogwood-canyon-hike-2'], ["Jun 29 Pond Dipping\nLet's explore the pond life!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/pond-dipping"], ['Jun 29 Arts in the Park\nTry your hand at watercolors!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/arts-in-the-park-1']]
['Jun 29 Hike with a Ranger!\nHike with a Ranger through Dogwood Canyon.\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/dogwood-canyon-hike-2']
False
not save
[["Jun 28 Dutch Oven Cookin'\nJoin us for a tasty cooking lesson!\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/dutch-oven-breakfast"], ['Jun 28 Friday Night Frog Talk\nCome see our green, long-legged friends!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/friday-night-frog-talk-8'], ['Jun 28 Wonders of the Night\nJoin a ranger for a night hike to find what goes bump in the night!\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/wonders-of-the-night-2'], ['Jun 29 Guided Nature Hike\nLearn about the local flora and fauna with a Texas Master Naturalist volunteer.\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/master-naturalist-guided-hike-5'], ['Jun 29 Hike with a Ranger!\nHike with a Ranger through Dogwood Canyon.\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/dogwood-canyon-hike-2'], ["Jun 29 Pond Dipping\nLet's explore the pond life!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/pond-dipping"], ['Jun 29 Arts in the Park\nTry your hand at watercolors!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/arts-in-the-park-1']]
["Jun 29 Pond Dipping\nLet's explore the pond life!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/pond-dipping"]
False
not save
[["Jun 28 Dutch Oven Cookin'\nJoin us for a tasty cooking lesson!\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/dutch-oven-breakfast"], ['Jun 28 Friday Night Frog Talk\nCome see our green, long-legged friends!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/friday-night-frog-talk-8'], ['Jun 28 Wonders of the Night\nJoin a ranger for a night hike to find what goes bump in the night!\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/wonders-of-the-night-2'], ['Jun 29 Guided Nature Hike\nLearn about the local flora and fauna with a Texas Master Naturalist volunteer.\nRay Roberts Lake State Park - Isle Du Bois Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-isle-du-bois-unit/master-naturalist-guided-hike-5'], ['Jun 29 Hike with a Ranger!\nHike with a Ranger through Dogwood Canyon.\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/dogwood-canyon-hike-2'], ["Jun 29 Pond Dipping\nLet's explore the pond life!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/pond-dipping"], ['Jun 29 Arts in the Park\nTry your hand at watercolors!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/arts-in-the-park-1']]
['Jun 29 Arts in the Park\nTry your hand at watercolors!\nRay Roberts Lake State Park - Johnson Branch Unit https://tpwd.texas.gov/calendar/ray-roberts-lake-johnson-branch-unit/arts-in-the-park-1']
False
not save

我已经打印了列表和我每次尝试比较的项目以进行故障排除，但我不明白为什么每次都会出现错误？ 在我看来，每个比较都应该是正确的，因为列表对象存在......

Answer 1

为什么不简单地使用：

result = tweet in tweeted

如here 所述，'in' 运算符用于检查列表中是否存在元素。