通过Python查找网页何时更新？

所以，我在抓取一个网页，我在网页上有一个显示整数的元素，当我抓取该元素时，我将明文存储在一个变量中，然后每次它抓取时，我将变量与网页上的明文进行比较。我不确定是否每次我都需要得到一个网页请求

from win10toast import ToastNotifier
from _overlapped import NULL

from plyer import notification
import requests

from bs4 import BeautifulSoup

toaster = ToastNotifier()
toaster.show_toast("Notification!", "Alert!", threaded=True, icon_path=NULL, duration=3)

URL = "https://rocketleague.tracker.network/rocket-league/profile/steam/76561198074072333/mmr?playlist=13"
page = requests.get(URL)
soup = BeautifulSoup(page.content, 'html.parser')

_title = ""
_message = ""

recent_mmr = "111"


def get_mmr(url):
    results = soup.find_all(class_="stat")
    for stat in results :
        titles = stat.find_all(class_="label")
        for t in titles :
            if(t.text.strip() == "Rating"):
                val = stat.find(class_="value").text.strip()
    return val

def get_rank(url):
    results = soup.find(class_="stat tier")
    rank = results.find(class_="label")
    return rank.text.strip()


_message = "Rank: " + get_rank(URL) + "\n" + "MMR: " + get_mmr(URL)
recent_mmr = get_mmr(URL)

import time
while toaster.notification_active():
    time.sleep(0.1)
    
notification.notify(
    title="Ranked 3v3",
    message= _message,
    app_icon=NULL,
    timeout=10
    )
print(recent_mmr)
recent_mmr = get_mmr(URL)
while True:
    print('running')
    #page = requests.get(URL)
    recent_mmr = get_mmr(URL)
    mmr_temp = recent_mmr
    print(mmr_temp +"(temp mmr)")
    if mmr_temp == recent_mmr:
        print("No update, recent MMR: " + recent_mmr)
        mmr_temp = recent_mmr
        time.sleep(60)
    else:
        notification.notify(
            title="Ranked 3v3",
            message= _message,
            app_icon=NULL,
            timeout=10
        )
        time.sleep(60)
        recent_mmr = get_mmr(URL)
        mmr_temp = recent_mmr
        print("Updated, recent MMR: " + recent_mmr)

---

您正在抓取网页以获取最近的mmr编号，将其复制到mmr temp，然后立即进行比较，看看它们是否相等——当然，它们是相等的，因为您刚刚复制了它

您需要稍微重新组织循环，并复制循环底部的mmr变量：

previous_mmr = None
while True:
    recent_mmr = get_mmr()
    if recent_mmr != previous_mmr:
        print("mmr changed")
    previous_mmr = recent_mmr