我正在從 Youtube 頻道收集有關視頻的信息，該頻道的視頻數量 > 50。所以這意味著我需要發出幾個請求，因為每個 JSON 響應的最大結果是 50 個視頻。我找到了一些解決方案，現在代碼看起來像這樣videoMetadata = [] #declaring our list, where the results will be stored# First requesturl = 'https://www.googleapis.com/youtube/v3/search?part=snippet&channelId='+CHANNEL_ID+'&maxResults=50&type=video&key='+API_KEYresponse = urllib.request.urlopen(url) #makes the call to YouTubevideos = json.load(response) #decodes the response so we can work with itnextPageToken = videos.get("nextPageToken") #gets the token of next page# Retrieve all the rest of the pageswhile nextPageToken: url = 'https://www.googleapis.com/youtube/v3/search?part=snippet&channelId='+CHANNEL_ID+'&maxResults=50&type=video&key='+API_KEY+"&pageToken="+nextPageToken response = urllib.request.urlopen(url) videos_next_page = json.load(response) nextPageToken = videos_next_page.get("nextPageToken")# loops through results and appends it to videoMetadata list # loop for the first pagefor video in videos['items']: if video['id']['kind'] == 'youtube#video': videoMetadata.append(video['id']['videoId'])# loop for the next page for video in videos_next_page['items']: if video['id']['kind'] == 'youtube#video':它工作正常，但也許有更好的解決方案，我如何將多個 JSON 響應的結果存儲在列表中？將不勝感激任何建議。
1 回答
慕雪6442864
TA貢獻1812條經驗 獲得超5個贊
它工作正常，
實際上，它沒有，除非你只有一個“下一頁” - 這個：
while nextPageToken:
url = 'https://www.googleapis.com/youtube/v3/search?part=snippet&channelId='+CHANNEL_ID+'&maxResults=50&type=video&key='+API_KEY+"&pageToken="+nextPageToken
response = urllib.request.urlopen(url)
videos_next_page = json.load(response)
nextPageToken = videos_next_page.get("nextPageToken")
每次迭代都會覆蓋videos_next_page ，所以你只會得到最后一頁。
如何將來自多個 JSON 響應的結果存儲在列表中
一旦反序列化，“來自 JSON 響應的結果”就是普通的 Python 對象（通常是dicts）。并且您將它們附加到列表中，就像您對其他任何事情一樣。
這是一個可能的重寫，可以正確處理這個問題（并且也可以更好地利用內存） - 警告：未經測試的代碼，所以我不能保證沒有錯字或其他什么，但至少你明白了。
def load_page(page_token=None):
url = "https://www.googleapis.com/youtube/v3/search?part=snippet&channelId={}&maxResults=50&type=video&key={}".format(CHANNEL_ID, API_KEY)
if page_token:
url += ("&pageToken={}".format(page_token))
response = urllib.request.urlopen(url) #makes the call to YouTube
return json.load(response)
def collect_videos_meta(page):
return [video['id']['videoId'] for video in page['items'] if video['id']['kind'] == 'youtube#video']
def main():
videoMetadata = []
nextPageToken = None # default initial value for the first page
# using `while True` and `break` avoids having to repeat the same
# code twice (once before the loop and once within the loop).
# This is a very common pattern in Python, you just have to make
# sure you will break out of the loop at some point...
while True:
page = load_page(nextPageToken)
videoMetadata.extend(collect_videos_meta(page))
nextPageToken = page.get("nextPageToken")
if not nextPageToken:
break
# now do what you want with those data...
print(videoMetadata)
if __name__ = "__main__":
main()
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