<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def verified_email_required(function=None, login_url=None, redirect_field_name=REDIRECT_FIELD_NAME):
 """ Even when email verification is not mandatory during signup, there may be circumstances during which you really want to prevent unverified users to proceed. This decorator ensures the user is authenticated and has a verified email address. If the former is not the case then the behavior is identical to that of the standard `login_required` decorator. If the latter does not hold, email verification mails are automatically resend and the user is presented with a page informing them they needs to verify their email address. """

    def decorator(view_func):
        @login_required(redirect_field_name=redirect_field_name,
                        login_url=login_url)
        def _wrapped_view(request, *args, **kwargs):
            if not EmailAddress.objects.filter(user=request.user,
                                               verified=True).exists():
                send_email_confirmation(request, request.user)
                return render(request,
                              'account/verified_email_required.html')
            return view_func(request, *args, **kwargs)
        return _wrapped_view

    if function:
        return decorator(function)
    return decorator