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python - Praw Reddit Web Crawler 错误“对象没有属性”

问题描述

我正在尝试使用 Reddit Web Crawler 从特定 subreddit 中提取热门评论并将它们保存在 .csv 文件中。

这是我的代码：

import datetime
import praw
import pandas as pd
reddit = praw.Reddit(client_id='',
                 client_secret='',
                 password='',
                 user_agent='',
                 username='')

#Reddit Crawler
list_counter = 0
sr_list = ['politics', 'conservative', 'liberal', 'libertarian', 'donaldtrump', 'joebiden', 'democrats', 'republican']
data = []
comments = []

while list_counter < len(sr_list):
subreddit = reddit.subreddit(sr_list[list_counter]).top(time_filter='month', limit=1) #Change limit for number of threads, .new/.hot
for s in subreddit:  # for every submission in the subreddit
    # fetch top level comments
    for c in s.comments:
        c_time = datetime.datetime.fromtimestamp(c.created_utc) #Convert format of comment time (Y:M:D , H:M:S)
        comments.append([c.subreddit, c._submission, 'Comment', s.title, c.author, c_time, c.score, c.body])
            #May not need c._submission
    s_time = datetime.datetime.fromtimestamp(s.created_utc) #Convert format of threadRE time
    data.append([s.subreddit, s.id,'Thread', s.title, s.author, s_time, s.score, s.selftext])
list_counter+= 1

#Export to CSV#
df = pd.DataFrame(data, columns=['Subreddit Name','Thread ID', 'Thread/Comment', 'Thread Title', 'Author',
                             'Timestamp','Score','Content'])
df1 = pd.DataFrame(comments, columns=['Subreddit Name','Thread ID','Thread/Comment', 'Thread Title', 'Author',
                             'Timestamp','Score','Content'])
result = pd.concat([df, df1])
result.to_csv('Raw Data.csv', index=False)

该代码在大多数情况下都可以正常工作，但是随着帖子和评论数量的增加，它会返回以下错误消息：

Traceback (most recent call last):
   File "/Users/robin/Documents/Python/code/Jonckr Reddit Web Crawler.py", line 23, in <module>
      c_time = datetime.datetime.fromtimestamp(c.created_utc) #Convert format of comment time (Y:M:D , H:M:S)
AttributeError: 'MoreComments' object has no attribute 'created_utc'

Process finished with exit code 1

我几乎是编程的业余爱好者，所以我不知道如何解决这个问题。帮助将不胜感激。

先感谢您。

标签： pythonredditpraw

解决方案

在 Praw文档中，它指出这些 MoreComments 对象表示加载更多评论并继续在 Reddit 上遇到的这个线程链接。

为了解决这个问题，他们提出以下建议：

from praw.models import MoreComments

for top_level_comment in submission.comments:
    if isinstance(top_level_comment, MoreComments):
        continue

在您的代码上下文中，尝试以下操作：

for c in s.comments:
    if isinstance(c, MoreComments):
        continue
    c_time = datetime.datetime.fromtimestamp(c.created_utc) #Convert format of comment time (Y:M:D , H:M:S)
    ...

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