@app.after_request
def add_header(r):
    """
    Add headers to both force latest IE rendering engine or Chrome Frame,
    and also to cache the rendered page for 10 minutes.
    """
r.headers['Cache-Control'] = 'no-cache, no-store, must-revalidate'
r.headers['Pragma'] = 'no-cache'
r.headers['Expires'] = '0'
r.headers['Cache-Control'] = 'public, max-age=0'
return r
Отключение кеширования в Flask