Python:删除数据帧的行并保留特定组
这个问题仍然没有得到回答 假设我有这个数据帧: 作为pd进口熊猫Python:删除数据帧的行并保留特定组,python,pandas,dataframe,duplicates,rows,Python,Pandas,Dataframe,Duplicates,Rows,这个问题仍然没有得到回答 假设我有这个数据帧: 作为pd进口熊猫 Name = ['ID', 'Country', 'IBAN','ID_bal_amt', 'ID_bal_time','Dan_city','ID_bal_mod','Dan_country','ID_bal_type', 'ID_bal_amt', 'ID_bal_time','ID_bal_mod','ID_bal_type' ,'Dan_sex', 'Dan_Age', 'Dan_country','Dan_sex' ,
Name = ['ID', 'Country', 'IBAN','ID_bal_amt', 'ID_bal_time','Dan_city','ID_bal_mod','Dan_country','ID_bal_type', 'ID_bal_amt', 'ID_bal_time','ID_bal_mod','ID_bal_type' ,'Dan_sex', 'Dan_Age', 'Dan_country','Dan_sex' , 'Dan_city','Dan_country','ID_bal_amt', 'ID_bal_time','ID_bal_mod','ID_bal_type' ]
Value = ['TAMARA_CO', 'GERMANY','FR56', '12','June','Berlin','OPBD', '55','CRDT','432', 'August', 'CLBD','DBT', 'M', '22', 'FRA', 'M', 'Madrid', 'ESP','432','March','FABD','CRDT']
Ccy = ['','','','EUR','EUR','','EUR','','','','EUR','EUR','USD','USD','USD','','CHF', '','DKN','','','USD','CHF']
Group = ['0','0','0','1','1','1','1','1','1','2','2','2','2','2','2','2','3','3','3','4','4','4','4']
df = pd.DataFrame({'Name':Name, 'Value' : Value, 'Ccy' : Ccy,'Group':Group})
print(df)
Name Value Ccy Group
0 ID TAMARA_CO 0
1 Country GERMANY 0
2 IBAN FR56 0
3 ID_bal_amt 12 EUR 1
4 ID_bal_time June EUR 1
5 Dan_city Berlin 1
6 ID_bal_mod OPBD EUR 1
7 Dan_country 55 1
8 ID_bal_type CRDT 1
9 ID_bal_amt 432 2
10 ID_bal_time August EUR 2
11 ID_bal_mod CLBD EUR 2
12 ID_bal_type DBT USD 2
13 Dan_sex M USD 2
14 Dan_Age 22 USD 2
15 Dan_country FRA 2
16 Dan_sex M CHF 3
17 Dan_city Madrid 3
18 Dan_country ESP DKN 3
19 ID_bal_amt 432 4
20 ID_bal_time March 4
21 ID_bal_mod FABD USD 4
22 ID_bal_type CRDT CHF 4
我想减少这个数据帧!我希望通过将在模式“CLBD”下关联的行组保持为“bal”,从而仅减少包含字符串“bal”的行。这意味着我在“CLBD”值中搜索名称“ID_bal_mod”,然后保留同一组中的所有其他名称ID_bal_amt、ID_bal_time、ID_bal_mod、ID_bal_type。在我们的示例中,是组2中的名称
此外,我想将列“Group”中的值更改为0
因此,在最后,我想得到这个新的数据帧,其中索引也被重置
Name Value Ccy Group
0 ID TAMARA_CO 0
1 Country GERMANY 0
2 IBAN FR56 0
3 Dan_city Berlin 1
4 Dan_country 55 1
5 ID_bal_amt 432 0
6 ID_bal_time August EUR 0
7 ID_bal_mod CLBD EUR 0
8 ID_bal_type DBT USD 0
9 Dan_sex M USD 2
10 Dan_Age 22 USD 2
11 Dan_country FRA 2
12 Dan_sex M CHF 3
13 Dan_city Madrid 3
14 Dan_country ESP DKN 3
有人有有效的想法吗?
谢谢让我们试试你的逻辑:
rows_with_bal = df['Name'].str.contains('bal')
groups_with_CLBD = ((rows_with_bal & df['Value'].eq('CLBD'))
.groupby(df['Group']).transform('any')
)
# set the `Group` to 0 for `groups_with_CLBD`
df.loc[groups_with_CLBD, 'Group'] = 0
# keep the rows without bal or `groups_with_CLBD`
df = df.loc[(~rows_with_bal) | groups_with_CLBD]
输出:
Name Value Ccy Group
0 ID TAMARA_CO 0
1 Country GERMANY 0
2 IBAN FR56 0
5 Dan_city Berlin 1
7 Dan_country 55 1
9 ID_bal_amt 432 0
10 ID_bal_time August EUR 0
11 ID_bal_mod CLBD EUR 0
12 ID_bal_type DBT USD 0
13 Dan_sex M USD 0
14 Dan_Age 22 USD 0
15 Dan_country FRA 0
16 Dan_sex M CHF 3
17 Dan_city Madrid 3
18 Dan_country ESP DKN 3
很抱歉,我认为它有效,但没有:您的代码更改了列组中所有不包含“bal”的其他名称的值。Dan_性别、Dan_年龄、Dan_国家应留在第2组。你知道我们该怎么改变吗?