调用Reddit开发者API时遭遇404错误求助

错误原因 #

1. Subreddit参数格式错误：调用scrape时传入的是完整Reddit URL（比如https://www.reddit.com/r/funny/）或单个帖子链接，但PRAW的r.subreddit()方法仅接受纯subreddit名称（如funny）。传入完整URL会导致API请求不存在的路径，直接返回404。
2. 误用帖子链接作为Subreddit参数：报错里实际传入的是单个帖子链接https://www.reddit.com/r/augmentedreality/comments/yv7sn8/ar_maximum_distance/，这显然不是subreddit名称，API自然找不到对应资源。

修复方案 #

1. 修正调用参数 #

将scrape的第一个参数改为纯subreddit名称，比如：

scrape('funny', 25)
# 或针对增强现实板块：
scrape('augmentedreality', 25)

2. 完善JSON输出逻辑 #

原代码中json.dumps(data)仅生成JSON字符串但未做任何处理，建议添加保存到文件或打印的逻辑。

3. （可选）使用PRAW推荐的方法 #

新版PRAW中get_hot()可替换为更简洁的hot()，功能完全一致。

修正后的完整代码 #

import praw
import json

def scrape(subreddit, limit):
    # 初始化Reddit客户端（替换为你真实的client_id和client_secret）
    r = praw.Reddit(user_agent='Reddit data organizer 1.0 by /u/reallymemorable', 
                    client_id='你的client_id', 
                    client_secret='你的client_secret')
    # 使用hot()替代get_hot()，符合新版PRAW规范
    submissions = r.subreddit(subreddit).hot(limit=limit)
    all_data = []
    for submission in submissions:
        data = {}
        data['title'] = submission.title
        data['score'] = submission.score
        data['url'] = submission.url
        data['author'] = str(submission.author) if submission.author else None
        data['subreddit'] = str(submission.subreddit)
        data['num_comments'] = submission.num_comments
        data['over_18'] = submission.over_18
        data['selftext'] = submission.selftext
        data['is_self'] = submission.is_self
        data['name'] = submission.name
        data['created_utc'] = submission.created_utc
        data['permalink'] = submission.permalink
        data['domain'] = submission.domain
        data['id'] = submission.id
        data['kind'] = submission.kind
        all_data.append(data)
    
    # 将数据写入JSON文件
    with open(f'{subreddit}_posts.json', 'w', encoding='utf-8') as f:
        json.dump(all_data, f, ensure_ascii=False, indent=4)
    print(f"数据已保存到{subreddit}_posts.json")

# 调用时传入纯subreddit名称
scrape('funny', 25)

额外注意事项 #

• 确保client_id和client_secret是从Reddit开发者平台获取的有效凭证，否则可能触发授权错误。
• 新增submission.author的空值判断，避免帖子作者被删除时抛出异常。

内容的提问来源于stack exchange，提问作者reallymemorable