human
Solve the following python programming problem given the following code:
def person() : 
    ' Missing Persons Registry (Match Finder) ' 
    table = s3db.pr_person 
    s3.crud_strings ['pr_person'].update (title_display = T ('Missing Person Details'), title_list = T ('Missing Persons'), label_list_button = T ('List Missing Persons'), msg_list_empty = T ('No Persons found'), msg_no_match = T ('No Persons currently reported missing')) 
    s3db.configure ('pr_group_membership', list_fields = ['id', 'group_id', 'group_head', 'comments']) 
    s3db.configure ('pr_person', deletable = False, editable = False, listadd = False, list_fields = ['id', 'first_name', 'middle_name', 'last_name', 'picture', 'gender', 'age_group']) 
    def prep(r) : 
        if ((not r.id) and (not r.method) and (not r.component)) : 
            body_id = r.get_vars.get ('match', None) 
            body = db ((db.dvi_body.id == body_id)).select (db.dvi_body.pe_label, limitby = (0, 1)).first () 
            label = ((body and body.pe_label) or ('#%s' % body_id)) 
            if body_id : 
                query = dvi_match_query (body_id) 
                r.resource.add_filter (query) 
                s3.crud_strings ['pr_person'].update (msg_no_match = T ('No matching records found')) 
return True 
s3.prep = prep 
    field = mpr_tabs.missing 
    field.readable = False 
    field.writable = False 
    field.default = True 
    table.age_group.readable = True 
    table.age_group.writable = True 
    if (len (request.args) == 0) : 
        s3.filter = (db.pr_person.missing == True) 
mpr_tabs = [(T ('Missing Report'), 'missing_report'), (T ('Person Details'), None), (T ('Physical Description'), 'physical_description'), (T ('Images'), 'image'), (T ('Identity'), 'identity'), (T ('Address'), 'address'), (T ('Contact Data'), 'contact'), (T ('Journal'), 'note')] 
    rheader = (lambda r : s3db.pr_rheader (r, tabs = mpr_tabs)) 
    output = s3_rest_controller ('pr', 'person', main = 'first_name', extra = 'last_name', rheader = rheader) 
    return output 

    
    

    Fix the buggy line: field = mpr_tabs.missing
assistant
#Here is Python code to fix the buggy line: field = mpr_tabs.

field = table.missing