one hot encoding example

for column_name in categorical_data.columns:
    temp_col=[]
    for value in categorical_data[column_name].unique():
        temp_col.append(column_name + value)


    onehotencoder=OneHotEncoder()
    transformed_data=onehotencoder.fit_transform(categorical_data[[column_name]]).toarray()
    df_ohe[temp_col] =transformed_data

df_ohe