Python -- Pandas：根据列数据取多行

lt = [['zoo',2],['foo',1],['zff',2],['zoo',6],['dff',0]]
df = pd.DataFrame(lt, columns=['string','int'])

df
string	int
0	zoo	2
1	foo	1
2	zff	2
3	zoo	6
4	dff	0

df[ df['string'].isin( ['zoo','zff'] ) ]   # 一列数据满足多个值的行
string	int
0	zoo	2
2	zff	2
3	zoo	6

df[ df['int'] == 6 ]    # 一列数据满足一个值的行
string	int
3	zoo	6

df[ (df['string'].isin(['zoo','zff'])) & (df['int'] == 6) ] 
string	int
3	zoo	6