这是第一个数据帧：
PARAM RULEID CLASSID
0 n311 0 RlfProfile
1 n311 1 RlfProfile
2 n311 10 RlfProfile
3 n311 11 RlfProfile
4 n311 12 RlfProfile
5 n311 13 RlfProfile
6 n311 14 RlfProfile
7 n311 15 RlfProfile
8 n311 16 RlfProfile
9 n311 17 RlfProfile
10 n311 18 RlfProfile
11 n311 2 RlfProfile
12 n311 3 RlfProfile
13 n311 4 RlfProfile
14 n311 5 RlfProfile
15 n311 6 RlfProfile
16 n311 7 RlfProfile
17 n311 8 RlfProfile
18 n311 9 RlfProfile
19 n310 0 RlfProfile
20 n310 1 RlfProfile
21 n310 10 RlfProfile
22 n310 11 RlfProfile
23 n310 12 RlfProfile
24 n310 13 RlfProfile
25 n310 14 RlfProfile
26 n310 15 RlfProfile
27 n310 16 RlfProfile
28 n310 17 RlfProfile
29 n310 18 RlfProfile
30 n310 2 RlfProfile
31 n310 3 RlfProfile
32 n310 4 RlfProfile
33 n310 5 RlfProfile
34 n310 6 RlfProfile
35 n310 7 RlfProfile
36 n310 8 RlfProfile
37 n310 9 RlfProfile
38 t301 0 RlfProfile
39 t301 1 RlfProfile
40 t301 10 RlfProfile
41 t301 11 RlfProfile
42 t301 12 RlfProfile
43 t301 13 RlfProfile
44 t301 14 RlfProfile
45 t301 15 RlfProfile
46 t301 16 RlfProfile
47 t301 17 RlfProfile
48 t301 18 RlfProfile
49 t301 2 RlfProfile
50 t301 3 RlfProfile
51 t301 4 RlfProfile
52 t301 5 RlfProfile
53 t301 6 RlfProfile
54 t301 7 RlfProfile
55 t301 8 RlfProfile
56 t301 9 RlfProfile
57 t310 0 RlfProfile
58 t310 1 RlfProfile
59 t310 10 RlfProfile
60 t310 11 RlfProfile
61 t310 12 RlfProfile
62 t310 13 RlfProfile
63 t310 14 RlfProfile
64 t310 15 RlfProfile
65 t310 16 RlfProfile
66 t310 17 RlfProfile
67 t310 18 RlfProfile
68 t310 2 RlfProfile
69 t310 3 RlfProfile
70 t310 4 RlfProfile
71 t310 5 RlfProfile
72 t310 6 RlfProfile
73 t310 7 RlfProfile
74 t310 8 RlfProfile
75 t310 9 RlfProfile
76 t311 0 RlfProfile
77 t311 1 RlfProfile
78 t311 10 RlfProfile
79 t311 11 RlfProfile
80 t311 12 RlfProfile
81 t311 13 RlfProfile
82 t311 14 RlfProfile
83 t311 15 RlfProfile
84 t311 16 RlfProfile
85 t311 17 RlfProfile
86 t311 18 RlfProfile
87 t311 2 RlfProfile
88 t311 3 RlfProfile
89 t311 4 RlfProfile
90 t311 5 RlfProfile
91 t311 6 RlfProfile
92 t311 7 RlfProfile
93 t311 8 RlfProfile
94 t311 9 RlfProfile
这是第二个数据帧：
RULEID CLASSID SID t301 n311 n310 t310 t311
0 0 RlfProfile MANAKV 2000 1 20 2000 10000
1 1 RlfProfile MANAKV 1000 1 10 500 5000
2 10 RlfProfile MANAKV 400 1 20 2000 3000
3 11 RlfProfile MANAKV 400 1 20 2000 3000
4 12 RlfProfile MANAKV 400 1 20 2000 3000
5 13 RlfProfile MANAKV 400 1 20 2000 3000
6 14 RlfProfile MANAKV 400 1 20 2000 3000
7 15 RlfProfile MANAKV 400 1 20 2000 3000
8 16 RlfProfile MANAKV 400 1 20 2000 3000
9 17 RlfProfile MANAKV 400 1 20 2000 3000
10 18 RlfProfile MANAKV 400 1 20 2000 3000
11 2 RlfProfile MANAKV 400 1 20 2000 3000
12 3 RlfProfile MANAKV 400 1 20 2000 3000
13 4 RlfProfile MANAKV 400 1 20 2000 3000
14 5 RlfProfile MANAKV 400 1 20 2000 3000
15 6 RlfProfile MANAKV 400 1 20 2000 3000
16 7 RlfProfile MANAKV 400 1 20 2000 3000
17 8 RlfProfile MANAKV 400 1 20 2000 3000
18 9 RlfProfile MANAKV 400 1 20 2000 3000
19 0 RlfProfile MANSRO 2000 1 20 2000 10000
20 1 RlfProfile MANSRO 1000 1 10 500 5000
21 10 RlfProfile MANSRO 1000 1 20 2000 3000
22 11 RlfProfile MANSRO 1000 1 20 2000 3000
23 12 RlfProfile MANSRO 1000 1 20 2000 3000
24 13 RlfProfile MANSRO 1000 1 20 2000 3000
25 14 RlfProfile MANSRO 1000 1 20 2000 3000
26 15 RlfProfile MANSRO 1000 1 20 2000 3000
27 16 RlfProfile MANSRO 1000 1 20 2000 3000
28 17 RlfProfile MANSRO 1000 1 20 2000 3000
29 18 RlfProfile MANSRO 1000 1 20 2000 3000
30 2 RlfProfile MANSRO 1000 1 20 2000 3000
31 3 RlfProfile MANSRO 1000 1 20 2000 3000
32 4 RlfProfile MANSRO 1000 1 20 2000 3000
33 5 RlfProfile MANSRO 1000 1 20 2000 3000
34 6 RlfProfile MANSRO 1000 1 20 2000 3000
35 7 RlfProfile MANSRO 1000 1 20 2000 3000
36 8 RlfProfile MANSRO 1000 1 20 2000 3000
37 9 RlfProfile MANSRO 1000 1 20 2000 3000
38 0 RlfProfile MBHQDL 2000 1 20 2000 10000
39 1 RlfProfile MBHQDL 1000 1 10 500 5000
40 10 RlfProfile MBHQDL 400 1 20 2000 3000
41 11 RlfProfile MBHQDL 400 1 20 2000 3000
42 12 RlfProfile MBHQDL 400 1 20 2000 3000
43 13 RlfProfile MBHQDL 400 1 20 2000 3000
44 14 RlfProfile MBHQDL 400 1 20 2000 3000
45 15 RlfProfile MBHQDL 400 1 20 2000 3000
46 16 RlfProfile MBHQDL 400 1 20 2000 3000
47 17 RlfProfile MBHQDL 400 1 20 2000 3000
48 18 RlfProfile MBHQDL 400 1 20 2000 3000
49 2 RlfProfile MBHQDL 400 1 20 2000 3000
50 3 RlfProfile MBHQDL 400 1 20 2000 3000
我需要以上两个数据框来获得这种输出数据框： 这只是某些行的示例输出
RULEID CLASSID SID Parameter Value
0 RlfProfile MANAKV t301 2000
0 RlfProfile MANAKV n311 1
0 RlfProfile MANAKV n310 20
0 RlfProfile MANAKV t310 2000
0 RlfProfile MANAKV t311 10000
1 RlfProfile MANAKV t301 1000
1 RlfProfile MANAKV n311 1
1 RlfProfile MANAKV n310 10
1 RlfProfile MANAKV t310 500
1 RlfProfile MANAKV t311 5000
0 RlfProfile MBHQDL t301 2000
0 RlfProfile MANAKV n311 1
答案 0 :(得分：0)
IIUC，您需要先melt，然后再merge
假设您的数据帧分别称为df1和df2。
df2a = pd.melt(df2,id_vars=['RULEID','CLASSID','SID'],var_name='PARAM')
df3 = pd.merge(df1,df2a,on=['RULEID','CLASSID','PARAM'],how='left')
print(df3[df2a.columns]) # maintains order of columns.
RULEID CLASSID SID PARAM value
0 0 RlfProfile MANAKV n311 1
1 0 RlfProfile MANSRO n311 1
2 0 RlfProfile MBHQDL n311 1
3 1 RlfProfile MANAKV n311 1
4 1 RlfProfile MANSRO n311 1
.. ... ... ... ... ...
250 7 RlfProfile MANSRO t311 3000
251 8 RlfProfile MANAKV t311 3000
252 8 RlfProfile MANSRO t311 3000
253 9 RlfProfile MANAKV t311 3000
254 9 RlfProfile MANSRO t311 3000