human
Complete the below
@click.command()
@click.argument('dest', default='-', type=click.File('wb'))
@click.option('--silent', '-q', default=False, is_flag=True, help='Silence    all    debug    output.')
@click.option('--indent', default=2, help='Number    of    spaces    to    indent    for    the    JSON    output.    (default:    2)')
@click.option('--exclude', default=None, help='Models    to    exclude    from    export.', metavar='MODELS')
@configuration
def export(dest, silent, indent, exclude):

    ''''Exports core metadata for the Sentry installation.'
    '''
 ... Write me a the Python code you requested?
assistant
#Here is the Python code you requested.
    if (exclude is None):
        exclude = ()
    else:
        exclude = exclude.lower().split(',')
    from django.db.models import get_apps
    from django.core import serializers
    def yield_objects():
        app_list = [(a, None) for a in get_apps()]
        for model in sort_dependencies(app_list):
            if ((not getattr(model, '__core__', True)) or (model.__name__.lower() in exclude) or model._meta.proxy):
                if (not silent):
                    click.echo(('>>    Skipping    model    <%s>' % (model.__name__,)), err=True)
                continue
            queryset = model._base_manager.order_by(model._meta.pk.name)
            for obj in queryset.iterator():
                (yield obj)
    if (not silent):
        click.echo('>>    Beginning    export', err=True)
    serializers.serialize('json', yield_objects(), indent=indent, stream=dest, use_natural_keys=True)