Pandas agg rename columns

How can i aggregate without group by in pandas

df.groupby(lambda _ : True).agg(new_col_name = ('col_name', 'agg_function'))

Pandas agg rename columns

grouped = df.groupby('id').agg({'col1': [('name1', 'sum')], 'col2': [('name2_mean', 'sum'), ('name2_custom_std', lambda x: np.std(x))]})
grouped.columns = grouped.columns.droplevel()

Similar codes

0 vote249 views1 answer
Django 3 create async rest api
Python
0 vote235 views1 answer
Using Lists as Queues
Python
0 vote246 views1 answer
Python getpass save file
Python
1 vote238 views1 answer
Counter in django template
Python
1 vote281 views2 answers
Pytorch l2 regularization
Python
0 vote270 views1 answer
Python f-string format date
Python
0 vote258 views1 answer
Prime number checking algorithm
Python
1 vote249 views1 answer
Delete folders using python
Python
0 vote241 views2 answers
Address already in use
Python
1 vote239 views1 answer
Set ttk combobox to readonly
Python