Check Instagram Follows who don't follow back

diff.py

#!/usr/bin/env python3

"""
1. Go to https://accountscenter.instagram.com/info_and_permissions/dyi/
2. Select 'Request Download'
3. Select Followers & Following 
4. Select 'All time' (default is 'Last Year')
5. Select 'Json' (default is 'HTML')
6. Download the data
7. Unzip and put this file into the same directory
8. Change your follower/following count to match your instagram numbers

USAGE: python3 diff.py
"""
import json

def extract_users(json_data, filename):
    users = set()
    data_list = []
    
    # --- Step 1: Normalize structure (List vs Dict) ---
    if isinstance(json_data, dict):
        if "relationships_following" in json_data:
            data_list = json_data["relationships_following"]
        elif "relationships_followers" in json_data:
            data_list = json_data["relationships_followers"]
    elif isinstance(json_data, list):
        data_list = json_data

    # --- Step 2: Extract usernames ---
    for entry in data_list:
        try:
            # CASE A: 'following.json' style (Username is in 'title')
            # We must check if title is NOT empty, because followers.json has empty titles.
            if 'title' in entry and entry['title']: 
                users.add(entry['title'])
            
            # CASE B: 'followers.json' style (Username is in 'string_list_data' -> 'value')
            elif 'string_list_data' in entry and len(entry['string_list_data']) > 0:
                item = entry['string_list_data'][0]
                if 'value' in item:
                    users.add(item['value'])
                
        except (KeyError, IndexError, TypeError):
            continue
            
    return users

# --- Main Logic ---

# 1. Load Followers
try:
    with open('followers_1.json', 'r') as f:
        followers_set = extract_users(json.load(f), "followers_1.json")
except FileNotFoundError:
    print("Error: Could not find 'followers_1.json'")
    followers_set = set()

# 2. Load Following
try:
    with open('following.json', 'r') as f:
        following_set = extract_users(json.load(f), "following.json")
except FileNotFoundError:
    print("Error: Could not find 'following.json'")
    following_set = set()

# 3. Calculate Difference
not_following_back = following_set - followers_set

print(f"--- STATS ---")
print(f"You follow: {len(following_set)}")
print(f"Followers:  {len(followers_set)}")
print(f"Not following you back: {len(not_following_back)}")
print(f"------------------------------------------")

# 4. Print Links
if len(not_following_back) > 0:
    for user in sorted(list(not_following_back)):
        print(f"https://www.instagram.com/{user}")