为什么此代码没有控制台输出？

Question

下面是我正在使用的代码，尽管控制台输出中没有错误，但仍然不返回任何内容。为什么代码没有输出？有什么我需要更改或修复的。我想我正确导入了扫描仪，但是可能存在问题。谢谢！

import sys
from scanner import Scanner
from functools import cmp_to_key

class Tweet:
    def __init__(self, tweeter, tweet, time):
        self.tweeter = tweeter[1:]
        self.tweet = tweet
        self.time = time
    def  __str__(self):
        return self.tweeter+" "+self.time
    def display(self):
        return self.tweeter+" " +self.tweet

def create_record(s):
    tweets = []
    tweeter = s.readtoken()
    tweet1count = 0

    while tweeter != "":
        tweet = s.readstring()
        t1 = Tweet(tweeter, tweet, s.readline())
        tweet1count += 1
        tweeter = s.readtoken()
        tweets.append(t1)
    return tweets

def read_records(file):
    s = Scanner(file)
    return create_record(s)

def is_more_recent(t1, t2):
    year, month, day, time = t1.time.split()
    month = ("0" + month)[-2:]
    day = ("0" + day)[-2:]
    timestamp1 = year + month + day + time
    year, month, day, time = t2.time.split()
    month = ("0" + day)[-2:]
    day = ("0" + day)[-2:]
    timestamp2 = year + month + day + time
    return timestamp1 > timestamp2

def merge_and_sort_tweets(tweets1, tweets2):
    tweets = tweets1 + tweets2
    cmp_items_py3 = cmp_to_key(is_more_recent)
    tweets.sort(key = cmp_items_py3)
    return tweets

def write_records(file, tweets):
    file = open(file, "w+")
    for t in tweets:
        file.write(str(t))

def main():
    print("Reading Files")
    tweets1 = read_records(sys.argv[1])
    tweets2 = read_records(sys.argv[2])
    tweet1count = len(tweets1)
    tweet2count = len(tweets2)
    if tweet1count > tweet2count:
        print("tweet1.txt contained the most tweets with" , tweet1count)
    elif tweet1count < tweet2count:
        print("tweet2.txt contained the most tweets with" , tweet2count)
    else:
        print("tweet1.txt contains ", tweet1count, "tweets. ")
        print("tweet2.txt contains ", tweet2count, "tweets. ")
    print("Merging files...")
    tweets = merge_and_sort_tweets(tweets1, tweets2)
    print("Writing file...")
    write_records(sys.argv[3], tweets)

    print("File writtem. Displying", min(5, len(tweets)),"earliest tweeters and tweets.")
    for i in range(min(5, len(tweets))):
        print(tweets[i].display())

    if __name__ == "__main__":
        main()