在这里，我试图过滤（删除）超过 30 个的行 pos_axillary 节点。下面的代码没有显示任何值。
l=list(range(0,30))
l
pos_ax=[x for x in breast.Pos_axillary_nodes.unique() if a in x]
pos_ax
breast = breast[df.Pos_axillary_nodes.isin(pos_ax)]
breast
Pos_axillary_nodes
1
3
0
2
4
10
0
0
9
30
1
10
7
0
13
0
1
0
0
0
0
6
15
0
21
2
0
0
3
1
0
11
1
5
0
0
0
0
2
4
2
0
0
23
0
0
0
8
0
0
8
0
0
1
0
0
1
2
4
20
0
1
52
2
0
0
14
2
3
0
2
0
4
6
9
19
0
1
0
16
6
0
1
0
0
14
0
0
1
2
3
5
20
0
3
0
23
0
0
0
6
0
0
3
4
4
12
11
11
7
8
2
0
0
0
10
1
0
0
1
1
3
0
1
13
0
0
6
0
1
1
2
0
0
4
1
13
3
7
1
0
1
3
2
3
4
0
4
0
4
5
0
1
0
0
0
4
1
3
9
24
12
1
1
2
1
0
11
23
5
7
7
3
0
46
0
7
19
1
0
6
15
1
0
1
18
0
3
22
1
9
3
0
2
1
0
0
5
14
1
9
0
0
0
0
0
0
0
0
3
1
0
0
3
2
35
0
0
1
4
0
7
3
17
0
1
2
25
0
5
0
1
0
0
0
8
0
0
13
0
19
6
0
0
0
1
0
0
0
0
0
9
28
0
22
0
0
0
0
2
22
15
0
0
0
2
0
1
0
13
0
1
0
8
1
0
0
0
0
0
0
8
0
0
0
0
4
14
0
0
8
0
2
0
0
0
3
0
0
3
0
1
0
3
1
2
慕村225694
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