Flask redirect from www to without www

flask_without_www.py

# Redirect without WWW
from urllib.parse import urlparse, urlunparse

@app.before_request
def redirect_without_www():
    urlparts = urlparse(request.url)
    if urlparts.netloc == 'www.YOUR-DOMAIN.com':
        urlparts_list = list(urlparts)
        urlparts_list[1] = 'YOUR-DOMAIN.com'
        return redirect(urlunparse(urlparts_list), code=301)