แสดงชื่อสมาชิกที่ไม่อยู่ในพรรคก้าวหน้า
Show member names that are not in the Progress Party.
df1 = pd.DataFrame(columns=['party_id', 'party_name']); df2 = pd.DataFrame(columns=['member_name', 'party_id'])
df2.loc[~df2['party_id'].isin(df1.loc[df1['party_name'] == 'Progress Party']['party_id'])]['member_name']