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python - 根据 df1 中的列值查找 df2 中的相交值,并在 df1 中创建一个具有检索值的新列(不匹配的列名)

转载 作者:行者123 更新时间:2023-12-04 15:11:32 24 4
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Python 新手,这是我需要帮助的最新挑战

在 df1 中,我有以下数据分布:

data = {'Code': ['53.110.30.0140.','53.110.30.0200.','53.110.30.0240. ','53.110.3130.','53.110.3140.'],
'AA': ['53','53','53','53','53'],
'BBB': ['110','110','110','110','110'],
'CC': ['30','30','30','31','31'],
'DDDD': ['0140','0200','0240','0030','0040']}

df1 = pd.DataFrame(data, columns=['Code','AA','BBB','CC','DDDD'])

在 df2 中,我有以下数据分布:

data2 = {'Size': ['0005','0007','0010','0015','0020','0030','0040','0060','0080','0100','0120','0140','0160','0180','0200','0220','0240'],
'10': [3,5,2,35,47,19,5,14,27,25,46,18,46,38,17,17,23],
'31': [48,11,26,4,28,25, 19,42,33,41,25,37,35,5,2,27,29],
'41': [1,32,38,12,15,39,6,46,5,36,35,25,13,12,50,19,19],
'20': [6,10,7,4,47,25,20,44,20,31,9,44,26,17,20,33,39],
'21': [21,31,44,12,18,40,8,4,18,32,34,40,29,10,6,14,22],
'30': [34,50,3,32,8,31,35,40,30,16,37,11,39,16,12,36,22],
'32': [41,25,32,11,35,18,49,12,31,4,24,8,14,29,28,12,7],
'40': [48,42,9,11,8,10,39,50,40,46,10,9,42,33,24,7,48],
'42': [20,21,21,3,23,50,8,41,7,14,14,5,19,9,13,41,48],
'50': [11,22,24,15,29,46,10,39,46,38,14,13,24,8,14,22,35],
'51': [41,47,18,26,34,4,19,7,36,13,27,20,21,49,46,30,16],
'60': [1,1,13,12,1,18,26,7,21,45,5,18,13,4,50,16,15],
'61': [10,18,24,12,25,48,19,32,5,40,37,8,32,14,15,1,20],
'62': [34,34,8,21,8,25,7,10,38,16,32,49,21,31,28,13,41]}

df2 = pd.DataFrame(data2, columns=['Size','10','31','41','20','21','30','32','40','42','50','51','60','61','62'])

我想要实现的是在 df1 中添加一个名为“值”的列,其中包含 df2 中满足以下两个匹配条件的值(换句话说,它们相交的地方就是我需要的值)

  • df1['DDDD'] 值与 df2['SIZE'] 匹配
  • df1['CC'] 值匹配列 [10][31][41][20][21][30][32][40][42][50][51][60][ 61][62]

如前所述,所需的结果将返回相交值,例如,如果 df1['DDDD'] = '0140' 和 df1['CC'] = '30',则 df2 返回的值应等于 ' 11'。

我尝试过使用合并和映射,但由于我的列名不匹配而遇到了困难

希望我已经解释清楚了。

提前致谢!

最佳答案

看起来像一个lookup 作业:

df2.set_index('Size', inplace=True)
df1['Out'] = df2.lookup(df1['DDDD'], df1['CC'])

输出:

               Code  AA  BBB  CC  DDDD  Out
0 53.110.30.0140. 53 110 30 0140 11
1 53.110.30.0200. 53 110 30 0200 12
2 53.110.30.0240. 53 110 30 0240 22
3 53.110.3130. 53 110 31 0030 25
4 53.110.3140. 53 110 31 0040 19

关于python - 根据 df1 中的列值查找 df2 中的相交值,并在 df1 中创建一个具有检索值的新列(不匹配的列名),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/65151212/

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