Scraping Reddit using Python

07 Oct, 2021
In this article, we are going to see how to scrape Reddit using Python, here we will be using python’s PRAW (Python Reddit API Wrapper) module to scrape the data. Praw is an acronym Python Reddit API wrapper, it allows Reddit API through Python scripts.
To install PRAW, run the following commands on the command prompt:
pip install praw
Step 1: To extract data from Reddit, we need to create a Reddit app. You can create a new Reddit app(https://www.reddit.com/prefs/apps).
Reddit – Create an App
Step 2: Click on “are you a developer? create an app...”.
Step 3: A form like this will show up on your screen. Enter the name and description of your choice. In the redirect uri box, enter http://localhost:8080
App Form
Step 4: After entering the details, click on “create app”.
Developed Application
The Reddit app has been created. Now, we can use python and praw to scrape data from Reddit. Note down the client_id, secret, and user_agent values. These values will be used to connect to Reddit using python.
In order to connect to Reddit, we need to create a praw instance. There are 2 types of praw instances:  
Read-only Instance: Using read-only instances, we can only scrape publicly available information on Reddit. For example, retrieving the top 5 posts from a particular subreddit.
Authorized Instance: Using an authorized instance, you can do everything you do with your Reddit account. Actions like upvote, post, comment, etc., can be performed.
Python3
# Read-only instancereddit_read_only = praw.Reddit(client_id="",         # your client id                               client_secret="",      # your client secret                               user_agent="")        # your user agent # Authorized instancereddit_authorized = praw.Reddit(client_id="",         # your client id                                client_secret="",      # your client secret                                user_agent="",        # your user agent                                username="",        # your reddit username                                password="")        # your reddit password
Now that we have created an instance, we can use Reddit’s API to extract data. In this tutorial, we will be only using the read-only instance.
There are different ways of extracting data from a subreddit. The posts in a subreddit are sorted as hot, new, top, controversial, etc. You can use any sorting method of your choice.
Let’s extract some information from the redditdev subreddit.
Python3
import prawimport pandas as pd reddit_read_only = praw.Reddit(client_id="",         # your client id                               client_secret="",      # your client secret                               user_agent="")        # your user agent  subreddit = reddit_read_only.subreddit("redditdev") # Display the name of the Subredditprint("Display Name:", subreddit.display_name) # Display the title of the Subredditprint("Title:", subreddit.title) # Display the description of the Subredditprint("Description:", subreddit.description)
Output:
Name, Title, and Description
Now let’s extract 5 hot posts from the Python subreddit:
Python3
subreddit = reddit_read_only.subreddit("Python") for post in subreddit.hot(limit=5):    print(post.title)    print()
Output:
Top 5 hot posts
We will now save the top posts of the python subreddit in a pandas data frame:
Python3
posts = subreddit.top("month")# Scraping the top posts of the current month posts_dict = {"Title": [], "Post Text": [],              "ID": [], "Score": [],              "Total Comments": [], "Post URL": []              } for post in posts:    # Title of each post    posts_dict["Title"].append(post.title)         # Text inside a post    posts_dict["Post Text"].append(post.selftext)         # Unique ID of each post    posts_dict["ID"].append(post.id)         # The score of a post    posts_dict["Score"].append(post.score)         # Total number of comments inside the post    posts_dict["Total Comments"].append(post.num_comments)         # URL of each post    posts_dict["Post URL"].append(post.url) # Saving the data in a pandas dataframetop_posts = pd.DataFrame(posts_dict)top_posts
Output:
top posts of the python subreddit
Python3
import pandas as pd top_posts.to_csv("Top Posts.csv", index=True)
Output:
CSV File of Top Posts
To extract data from Reddit posts, we need the URL of the post. Once we have the URL, we need to create a submission object.
Python3
import prawimport pandas as pd reddit_read_only = praw.Reddit(client_id="",         # your client id                               client_secret="",      # your client secret                               user_agent="")        # your user agent # URL of the posturl = "https://www.reddit.com/r/IAmA/comments/m8n4vt/\im_bill_gates_cochair_of_the_bill_and_melinda/" # Creating a submission objectsubmission = reddit_read_only.submission(url=url)
We will extract the best comments from the post we have selected. We will need the MoreComments object from the praw module. To extract the comments, we will use a for-loop on the submission object. All the comments will be added to the post_comments list. We will also add an if-statement in the for-loop to check whether any comment has the object type of more comments. If it does, it means that our post has more comments available. So we will add these comments to our list as well. Finally, we will convert the list into a pandas data frame.
Python3
from praw.models import MoreComments post_comments = [] for comment in submission.comments:    if type(comment) == MoreComments:        continue     post_comments.append(comment.body) # creating a dataframecomments_df = pd.DataFrame(post_comments, columns=['comment'])comments_df
Output:
list into a pandas dataframe
 
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