未使用 python 解析文本文件的更新

Question

我正在解析不斷更新的文本文件 ('placlog.txt') 中的數據。 當我運行代碼時，一切都會按預期打印，但是如果在代碼運行時對 placlog 文件有任何更新，則不會打印它。

placlog 文件正在由第三方程序更新，我正在使用上述代碼讀取文件並打印任何更新。

格式化后，文本應通過 Telegram API 發送。 這部分也在最初工作。

import urllib.parse
import time
import requests
import os


def post_to_telegram(msg):
    #print(msg)
    base_url = 'https://api.telegram.org/bot&text="{}'.format(msg)
    requests.get(base_url)

def check_url_inMsgList(stringToMatch, msgList):
    for i in msgList:
        if (stringToMatch in i):
            return False
    return True


try:
    f = open("oldFile.txt", "r")
    msgList = f.read().split("\n")
    f.close()
except:
    f = open("oldFile.txt", "w")
    msgList = []
    f.close()
selections = []
urr = ""
name = ""
pie = ""
ourLines = 2400
url_found = 0
name_found = 0
pie_found = 0
while (True):
    file1 = open('placlog.txt', 'r')
    Lines = file1.readlines()
    file1.close()
    while (True):
        # print("-------------------------------")
        if (ourLines == len(Lines)):
            break
        elif (ourLines > len(Lines)):
            ourLines = 0
        else:
            txt = Lines[ourLines].strip()
            tlist = txt.split("&")
            ourLines = ourLines + 1
            for subtxt in tlist:
                if "eventurl=" in subtxt:
                    a = subtxt[9:len(subtxt) - 3]
                    url = "www.awebsite.com/%23" + a.replace("%23", "/")
                    #url = url.replace("%23", "#")
                    for i in range(10):
                        if "F" + str(i) + "/" in url:
                            url = url.split("F" + str(i) + "/")[0] + "F" + str(i) + "/"
                    urr = url
                    url_found = 1
                elif "bit=" in subtxt:
                    name = urllib.parse.unquote(subtxt[4:len(subtxt)])
                    name_found = 1
                elif "pie\":" in subtxt:
                    a = subtxt.split("price")[1]
                    pie = a.split("\"")[2]
                    pie = float(pie)
                    pie = round(pie, 1)
                    pie = str(pie)
                    pie_found = 1
                    selections.append(url + name + pie)
                    msg = (url + " " + name + " " + pie)
                    stringToFind = url + " " + name
                    if (check_url_inMsgList(stringToFind, msgList)):
                        post_to_telegram(msg)
                        msgList.append(msg)
                        print(msg)
                        f = open("oldFile.txt", "a+")
                        f.write(msg + "\n")
                        f.close()
                    time.sleep(0.5)
                elif "minodds=" in subtxt:
                    a = subtxt.split("minodds=")[1]
                    pie = a.split("&")[0]
                    pie = float(pie)
                    rie = round(pie, 1)
                    pie = str(pie)
                    pie_found = 1
                    selections.append(url + name + pie)
                    msg = (url + " " + name + " " + pie)
                    stringToFind = url + " " + name
                    if (check_url_inMsgList(stringToFind, msgList)):
                        post_to_telegram(msg)
                        msgList.append(msg)
                        print(msg)
                        f = open("oldFile.txt", "a+")
                        f.write(msg + "\n")
                        f.close()
                    time.sleep(0.5)
    time.sleep(1)

Answer 1

我建議使用看門狗，看看這是否對你的情況有幫助。 它可以監視文件系統的更改，因此您可以定義一個在 placlog.txt 文件更改/更新時執行的函數。

一個很好的指南可以在這里找到： http : //thepythoncorner.com/dev/how-to-create-a-watchdog-in-python-to-look-for-filesystem-changes/

從該指南中，您可以簡單地更改定義的函數以滿足您的需求，即

def on_modified(event):
    if event.src_path == "path/to/placlog.txt":
        with open('placlog.txt', 'r') as placlog:
            lines = file1.readlines()
        

你能試試這個，看看它是否有幫助？ 我仍然推薦文件 i/o 的 with 語句，因為無論如何你總是希望你的文件關閉。

此鏈接也可能很有用，因為它們還監視單個 .txt 文件： Python Watchdog - src_path 不一致

看門狗文檔： https : //pythonhosted.org/watchdog/

注意：由於您澄清了問題，因此刪除了舊答案。