human
Complete the below
def inv_item():

    ''''REST Controller'
    '''
assistant
#Here is the Python program you requested.
    viewing = get_vars.get('viewing', None)
    if viewing:
        (tn, id) = viewing.split('.', 1)
        if (tn == 'inv_track_item'):
            table = s3db.inv_track_item
            record = db((table.id == id)).select(table.item_id, limitby=(0, 1)).first()
            redirect(URL(c='inv', f='track_movement', args=[], vars={'viewing': ('%s.%s' % ('inv_inv_item', record.item_id))}))
    tablename = 'inv_inv_item'
    table = s3db[tablename]
    auth.permitted_facilities(table=table, error_msg=T('You    do    not    have    permission    for    any    site    to    add    an    inventory    item.'))
    s3.crud_strings[tablename].msg_list_empty = T('No    Stock    currently    registered')
    report = get_vars.get('report')
    if (report == 'mon'):
        s3.crud_strings[tablename].update(dict(title_list=T('Monetization    Report'), subtitle_list=T('Monetization    Details')))
        s3db.configure(tablename, list_fields=['id', (T('Donor'), 'supply_org_id'), (T('Items/Description'), 'item_id'), (T('Quantity'), 'quantity'), (T('Unit'), 'item_pack_id'), (T('Unit    Value'), 'pack_value'), (T('Total    Value'), 'total_value'), (T('Remarks'), 'comments'), 'status'])
    else:
        s3db.configure(tablename, insertable=settings.get_inv_direct_stock_edits(), list_fields=['id', 'site_id', 'item_id', 'item_id$code', 'item_id$item_category_id', 'quantity', 'pack_value'])
    if ((len(request.args) > 1) and (request.args[1] == 'track_item')):
        s3db.configure('inv_track_item', create=False, listadd=False, editable=False, deletable=False)
    else:
        s3.filter = (table.quantity != 0)
    def prep(r):
        if (r.method != 'report'):
            s3.dataTable_group = 1
        return True
    s3.prep = prep
    def import_prep(data):
        '\n                                                Deletes    all    Stock    records    of    the    organisation/branch\n                                                before    processing    a    new    data    import\n                                '
 ...