Prepare: Remove Constant Columns and Outliers

import pandas as pd
import numpy as np

df = pd.DataFrame()
df['col1'] = [1,2,3,4,5]
df['col2'] = np.ones(5)
df['col3'] = [1,2,101,3,4]
df

	col1	col2	col3
0	1	1.0	1
1	2	1.0	2
2	3	1.0	101
3	4	1.0	3
4	5	1.0	4

Removing Constant Columns

from chemml.preprocessing import ConstantColumns, Outliers
df1 = ConstantColumns(df)
df1

	col1	col3
0	1	1
1	2	2
2	3	101
3	4	3
4	5	4

Removing oultiers based on mean

df_clean = Outliers(df, m=2.0,strategy='mean')
df_clean

	col1	col2	col3
0	1	1.0	1
1	2	1.0	2
2	3	1.0	101
3	4	1.0	3
4	5	1.0	4

Removing outliers based on median

df_clean = Outliers(df, m=2.0,strategy='median')
df_clean

	col1	col2	col3
0	1	1.0	1
1	2	1.0	2
3	4	1.0	3
4	5	1.0	4