I was trying to solve the last problem of pset5 of MIT 6.0001 but I don't know what is happening here. When I run this code, a window pops up which should provide me with the news feed but it doesn't! It's just blank. The code keeps on running but no news is shown on the window. I have also removed the yahoo stories as they no longer include descriptions.
This is my code :
# 6.0001/6.00 Problem Set 5 - RSS Feed Filter# Name: Ravi Dayabhai# Collaborators: N/A# Time: N/Aimport feedparserimport stringimport timeimport threadingfrom project_util import translate_htmlfrom mtTkinter import *from datetime import datetimeimport pytz#-----------------------------------------------------------------------#======================# Code for retrieving and parsing# Google and Yahoo News feeds# Do not change this code#======================def process(url):""" Fetches news items from the rss url and parses them. Returns a list of NewsStory-s.""" feed = feedparser.parse(url) entries = feed.entries ret = [] for entry in entries: guid = entry.guid title = translate_html(entry.title) link = entry.link description = translate_html(entry.description) pubdate = translate_html(entry.published) try: pubdate = datetime.strptime(pubdate, "%a, %d %b %Y %H:%M:%S %Z") pubdate.replace(tzinfo=pytz.timezone("GMT")) # pubdate = pubdate.astimezone(pytz.timezone('EST')) # pubdate.replace(tzinfo=None) except ValueError: pubdate = datetime.strptime(pubdate, "%a, %d %b %Y %H:%M:%S %z") newsStory = NewsStory(guid, title, description, link, pubdate) ret.append(newsStory) return ret#======================# Data structure design#======================# Problem 1# TODO: NewsStoryclass NewsStory(object): def __init__(self, guid, title, description, link, pubdate): self.guid = guid self.title = title self.description = description self.link = link self.pubdate = pubdate def get_guid(self): return self.guid def get_title(self): return self.title def get_description(self): return self.description def get_link(self): return self.link def get_pubdate(self): return self.pubdate#======================# Triggers#======================class Trigger(object): def evaluate(self, story):""" Returns True if an alert should be generated for the given news item, or False otherwise.""" # DO NOT CHANGE THIS! raise NotImplementedError# PHRASE TRIGGERS# Problem 2# TODO: PhraseTriggerclass PhraseTrigger(Trigger): def __init__(self, phrase): self.phrase = phrase def is_phrase_in(self, text): # Clean the text, phrase; adding in terminal space as delimiter no_punct_text = ''.join(ch if ch not in string.punctuation else '' for ch in text.upper()) cleaned_text = ''.join(no_punct_text.split()) +'' no_punct_phrase = ''.join(ch if ch not in string.punctuation else '' for ch in self.phrase.upper()) cleaned_phrase = ''.join(no_punct_phrase.split()) +'' # Search cleaned text for instance of exact phrase if cleaned_phrase not in cleaned_text: return False else: return True# Problem 3# TODO: TitleTriggerclass TitleTrigger(PhraseTrigger): def evaluate(self, story): return self.is_phrase_in(story.get_title())# Problem 4# TODO: DescriptionTriggerclass DescriptionTrigger(PhraseTrigger): def evaluate(self, story): return self.is_phrase_in(story.get_description())# TIME TRIGGERS# Problem 5# TODO: TimeTrigger# Constructor:# Input: Time has to be in EST and in the format of "%d %b %Y %H:%M:%S".# Convert time from string to a datetime before saving it as an attribute.class TimeTrigger(Trigger): def __init__(self, str_time): # Convert string to 'datetime' object, set timezone to EST time = datetime.strptime(str_time, "%d %b %Y %H:%M:%S") # time = time.replace(tzinfo=pytz.timezone("EST")) self.time = time# Problem 6# TODO: BeforeTrigger and AfterTriggerclass BeforeTrigger(TimeTrigger): def evaluate(self, story): try: condition = story.get_pubdate() < self.time except: self.time = self.time.replace(tzinfo=pytz.timezone("EST")) condition = story.get_pubdate() < self.time if condition: return True else: return Falseclass AfterTrigger(TimeTrigger): def evaluate(self, story): try: condition = story.get_pubdate() > self.time except: self.time = self.time.replace(tzinfo=pytz.timezone("EST")) condition = story.get_pubdate() > self.time if condition: return True else: return False# COMPOSITE TRIGGERS# Problem 7# TODO: NotTriggerclass NotTrigger(Trigger): def __init__(self, T): self.T = T def evaluate(self, story): return not self.T.evaluate(story)# Problem 8# TODO: AndTriggerclass AndTrigger(Trigger): def __init__(self, T1, T2): self.T1 = T1 self.T2 = T2 def evaluate(self, story): return self.T1.evaluate(story) and self.T2.evaluate(story)# Problem 9# TODO: OrTriggerclass OrTrigger(Trigger): def __init__(self, T1, T2): self.T1 = T1 self.T2 = T2 def evaluate(self, story): return self.T1.evaluate(story) or self.T2.evaluate(story)#======================# Filtering#======================# Problem 10def filter_stories(stories, triggerlist):""" Takes in a list of NewsStory instances. Returns: a list of only the stories for which a trigger in triggerlist fires.""" # TODO: Problem 10 filtered_stories = [] for story in stories: if any([T.evaluate(story) for T in triggerlist]): filtered_stories.append(story) return filtered_stories#======================# User-Specified Triggers#======================# Problem 11def read_trigger_config(filename):""" filename: the name of a trigger configuration file Returns: a list of trigger objects specified by the trigger configuration file.""" # We give you the code to read in the file and eliminate blank lines and # comments. You don't need to know how it works for now! trigger_file = open(filename, 'r') lines = [] for line in trigger_file: line = line.rstrip() if not (len(line) == 0 or line.startswith('//')): lines.append(line) # TODO: Problem 11 # 'lines' is the list of lines that you need to parse and for which you need # to build triggers # Initialize trigger mapping dictionary t_map = {"TITLE": TitleTrigger,"DESCRIPTION": DescriptionTrigger,"AFTER": AfterTrigger,"BEFORE": BeforeTrigger,"NOT": NotTrigger,"AND": AndTrigger,"OR": OrTrigger } # Initialize trigger dictionary, trigger list trigger_dict = {} trigger_list = [] # Helper function to parse each line, create instances of Trigger objects, # and execute 'ADD' def line_reader(line): data = line.split(',') if data[0] != "ADD": if data[1] == "OR" or data[1] == "AND": trigger_dict[data[0]] = t_map[data[1]](trigger_dict[data[2]], trigger_dict[data[3]]) else: trigger_dict[data[0]] = t_map[data[1]](data[2]) else: trigger_list[:] += [trigger_dict[t] for t in data[1:]] for line in lines: line_reader(line) return trigger_listSLEEPTIME = 120 #seconds -- how often we polldef main_thread(master): # A sample trigger list - you might need to change the phrases to correspond # to what is currently in the news try:# t1 = TitleTrigger("President")# t2 = DescriptionTrigger("Trump")# t3 = DescriptionTrigger("Twitter")# t4 = AndTrigger(t1, t3)# triggerlist = [t1, t4] # Problem 11 # TODO: After implementing read_trigger_config, uncomment this line triggerlist = read_trigger_config('C:/Users/Desktop/MIT/6-0001-fall-2016/6-0001-fall-2016/contents/assignments/pset5/pset5/triggers.txt') # **The above path is for the text file provided. #It also says : #trigger file - if you've done problem 9 but no stories are popping up, you should edit this file #to contain triggers that will fire on current news stories!** I don't know how to do that! # HELPER CODE - you don't need to understand this! # Draws the popup window that displays the filtered stories # Retrieves and filters the stories from the RSS feeds frame = Frame(master) frame.pack(side=BOTTOM) scrollbar = Scrollbar(master) scrollbar.pack(side=RIGHT,fill=Y) t = "Google & Yahoo Top News" title = StringVar() title.set(t) ttl = Label(master, textvariable=title, font=("Helvetica", 18)) ttl.pack(side=TOP) cont = Text(master, font=("Helvetica",14), yscrollcommand=scrollbar.set) cont.pack(side=BOTTOM) cont.tag_config("title", justify='center') button = Button(frame, text="Exit", command=root.destroy) button.pack(side=BOTTOM) guidShown = [] def get_cont(newstory): if newstory.get_guid() not in guidShown: cont.insert(END, newstory.get_title()+"\n", "title") cont.insert(END, "\n---------------------------------------------------------------\n", "title") cont.insert(END, newstory.get_description()) cont.insert(END, "\n*********************************************************************\n", "title") guidShown.append(newstory.get_guid()) while True: print("Polling . . .", end='') # Get stories from Google's Top Stories RSS news feed stories = process("http://news.google.com/news?output=rss") # Get stories from Yahoo's Top Stories RSS news feed# stories.extend(process("http://news.yahoo.com/rss/topstories")) stories = filter_stories(stories, triggerlist) list(map(get_cont, stories)) scrollbar.config(command=cont.yview) print("Sleeping...") time.sleep(SLEEPTIME) except Exception as e: print(e)if __name__ == '__main__': root = Tk() root.title("Some RSS parser") t = threading.Thread(target=main_thread, args=(root,)) t.start() root.mainloop()This is the window :enter image description here
please help me out.