text: import sqlite3
  
  import click
  from flask import current_app, g
  from flask.cli import with_appcontext
  
  
  def get_db():
      if 'db' not in g:
          g.db = sqlite3.connect(
              current_app.config['DATABASE'],
              detect_types=sqlite3.PARSE_DECLTYPES
          )
          g.db.row_factory = sqlite3.Row
  
      return g.db
  
  
  def close_db(e=None):
      db = g.pop('db', None)
  
      if db is not None:
          db.close()
  
  def init_app(app):
      app.teardown_appcontext(close_db)
      #app.cli.add_command(init_db_command)
  
  def query_db(query, args=(), returnDataQuery=True, one=False):
      if returnDataQuery:
          cur = get_db().execute(query, args)
          rv = cur.fetchall()
          cur.close()
          return (rv[0] if rv else None) if one else rv
      else:
          cur = get_db().execute(query, args)
          get_db().commit()
          cur.close()
      
      return
  
  def init_db():
      db = get_db()
  
      with current_app.open_resource('schema.sql') as f:
          db.executescript(f.read().decode('utf8'))
  