code: def init_db():
      """Clear existing data and create new tables."""
      db = get_db()
  
      with current_app.open_resource("schema.sql") as f:
          db.executescript(f.read().decode("utf8"))
  
file_path: flask/examples/tutorial/flaskr/db.py
imports: import sqlite3
  import click
  from flask import current_app
  from flask import g
label_desc: Use image node_id 3 for calling a global function with example usage: init_db() without return types