格式字符串時數項丟失

我試圖執行此代碼，顯示我一些IMDB電影分級：格式字符串時數項丟失

import json 
import sys 

import imdb 
import sendgrid 

NOTIFY_ABOVE_RATING = 7.5 

SENDGRID_API_KEY = "API KEY GOES HERE" 


def run_checker(scraped_movies): 
    imdb_conn = imdb.IMDb() 
    good_movies = [] 
    for scraped_movie in scraped_movies: 
     imdb_movie = get_imdb_movie(imdb_conn, scraped_movie['name']) 
     if imdb_movie['rating'] > NOTIFY_ABOVE_RATING: 
      good_movies.append(imdb_movie) 
    if good_movies: 
     send_email(good_movies) 


def get_imdb_movie(imdb_conn, movie_name): 
    results = imdb_conn.search_movie(movie_name) 
    movie = results[0] 
    imdb_conn.update(movie) 
    print("{title} => {rating}".format(**movie)) 
    return movie 


def send_email(movies): 
    sendgrid_client = sendgrid.SendGridClient(SENDGRID_API_KEY) 
    message = sendgrid.Mail() 
    message.add_to("[email protected]") 
    message.set_from("no-reply[email protected]") 
    message.set_subject("Highly rated movies of the day") 
    body = "High rated today:<br><br>" 
    for movie in movies: 
     body += "{title} => {rating}".format(**movie) 
    message.set_html(body) 
    sendgrid_client.send(message) 
    print("Sent email with {} movie(s).".format(len(movies))) 


if __name__ == '__main__': 
    movies_json_file = sys.argv[1] 
    with open(movies_json_file) as scraped_movies_file: 
     movies = json.loads(scraped_movies_file.read()) 
    run_checker(movies)

但它返回我這個錯誤：

C:\Python27\Scripts>python check_imdb.py movies.json 
T2 Trainspotting => 8.1 
Sing => 7.3 
Traceback (most recent call last): 
    File "check_imdb.py", line 49, in <module> 
    run_checker(movies) 
    File "check_imdb.py", line 16, in run_checker 
    imdb_movie = get_imdb_movie(imdb_conn, scraped_movie['name']) 
    File "check_imdb.py", line 27, in get_imdb_movie 
    print("{title} => {rating}".format(**movie)) 
KeyError: 'rating'

發生這種情況是因爲它試圖打印沒有評分的電影。我嘗試過/多次修復它，但沒有成功。

來源

2017-01-31 Lestat

問題是因爲您的movie字典沒有rating密鑰。爲了解決這個問題，你可以使用dict.setdefault爲「未知」或「0」 （基於什麼適合你）作爲設定等級的默認值：

# set value of 'rating' as 'unknown' if 'rating' key is not present 
movie.setdefault('rating', 'unknown') 

# then do format as: 
"{title} => {rating}".format(**movie)

欲瞭解更多信息，請查看：Use cases for the setdefault dict method

來源

2017-01-31 21:03:26

我做到了。但現在，當沒有標題時，它顯示 'movie = results [0]' 'IndexError：list index out of range' Tryed movie.setdefault（'title'，'unknown'）but nothing chaged。 – Lestat

@Lestat我相信你知道這不是教程服務。你將不得不花費一些努力來自己調試問題。基於這個新錯誤，最大I（或其他人）可以告訴'結果'是空列表，並且您試圖訪問第0個索引處的元素。因此，你在錯誤中看到的消息 –

格式字符串時數項丟失

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