Create a new column with value in another in pandas

Question

Hel,lo I have a dataframe such as:

Groups   Names                          COLs  COLe
G1     ABC_DEF.1:2-300():Canis_lupus    2     300
G1     SDDD1                            NA    NA
G1     SKUD.2.                          NA    NA
G1     SEQUENCE3                        NA    NA
G1     ABC_DEF.1:400-600():Canis_lupus  400   600
G1     IJK_LMN.1:20-200():Bos_taurus    20    200
G2     OP_D:500-1000():Felis_catus      500   1000
G2     JDJDJ99                          NA    NA

and I would like to add a new column Names2 and put within groups the all Names without () in it content against every Names with () in its content:

The output would be:

Groups   Names                          Names2    COLs  COLe
G1     ABC_DEF.1:2-300():Canis_lupus    SDDD1     2     300
G1     ABC_DEF.1:2-300():Canis_lupus    SKUD.2.   2     300
G1     ABC_DEF.1:2-300():Canis_lupus    SEQUENCE3 2     300
G1     ABC_DEF.1:400-600():Canis_lupus  SDDD1     400   600
G1     ABC_DEF.1:400-600():Canis_lupus  SKUD.2.   400   600
G1     ABC_DEF.1:400-600():Canis_lupus  SEQUENCE3 400   600
G1     IJK_LMN.1:20-200():Bos_taurus    SDDD1     20    200
G1     IJK_LMN.1:20-200():Bos_taurus    SKUD.2.   20    200
G1     IJK_LMN.1:20-200():Bos_taurus    SEQUENCE3 20    200
G2     OP_D:500-1000():Felis_catus      JDJDJ99   500   1000

Does someone have an idea using pandas?

Answer 1

df1 = df[df.Names.str.contains('()', regex=False)]
df2 = df[~df.Names.str.contains('()', regex=False)][['Groups', 'Names']]

print( pd.merge(left=df1, right=df2, on='Groups').rename(columns={"Names_x": "Names", "Names_y": "Names2"}) )

Prints:

  Groups                            Names   COLs    COLe     Names2
0     G1    ABC_DEF.1:2-300():Canis_lupus    2.0   300.0      SDDD1
1     G1    ABC_DEF.1:2-300():Canis_lupus    2.0   300.0    SKUD.2.
2     G1    ABC_DEF.1:2-300():Canis_lupus    2.0   300.0  SEQUENCE3
3     G1  ABC_DEF.1:400-600():Canis_lupus  400.0   600.0      SDDD1
4     G1  ABC_DEF.1:400-600():Canis_lupus  400.0   600.0    SKUD.2.
5     G1  ABC_DEF.1:400-600():Canis_lupus  400.0   600.0  SEQUENCE3
6     G1    IJK_LMN.1:20-200():Bos_taurus   20.0   200.0      SDDD1
7     G1    IJK_LMN.1:20-200():Bos_taurus   20.0   200.0    SKUD.2.
8     G1    IJK_LMN.1:20-200():Bos_taurus   20.0   200.0  SEQUENCE3
9     G2      OP_D:500-1000():Felis_catus  500.0  1000.0    JDJDJ99