input: Write a python function to create a SQLite table and insert comments from Reddit using PRAW.
  assert create_and_insert_comments('YOUR_CLIENT_ID', 'YOUR_CLIENT_SECRET', 'YOUR_USER_AGENT') is None
output: import sqlite3
  import praw
  
  def create_and_insert_comments(client_id, client_secret, user_agent):
      # Connect to SQLite database (or create it)
      conn = sqlite3.connect('reddit_comments.db')
      cursor = conn.cursor()
  
      # Create table
      cursor.execute('''CREATE TABLE IF NOT EXISTS comments
                        (id TEXT PRIMARY KEY, author TEXT, body TEXT, created_utc REAL)''')
  
      # Initialize PRAW with provided credentials
      reddit = praw.Reddit(client_id=client_id,
                           client_secret=client_secret,
                           user_agent=user_agent)
  
      # Fetch comments from a subreddit (e.g., 'python')
      subreddit = reddit.subreddit('python')
      for comment in subreddit.comments(limit=10):
          cursor.execute('''INSERT OR IGNORE INTO comments (id, author, body, created_utc)
                            VALUES (?, ?, ?, ?)''',
                         (comment.id, str(comment.author), comment.body, comment.created_utc))
  
      # Commit changes and close connection
      conn.commit()
      conn.close()