standardize pandas python code example

Example 1: standardise columns python

from sklearn.preprocessing import StandardScaler
df[['col1', 'col2']] = StandardScaler().fit_transform(df[['col1', 'col2']])

Example 2: function to scale features in dataframe

# define a method to scale data, looping thru the columns, and passing a scaler
def scale_data(data, columns, scaler):
    for col in columns:
        data[col] = scaler.fit_transform(data[col].values.reshape(-1, 1))
    return data