enriches dummy data

cohorts_enrichment.py

customer_data = pd.DataFrame(df.groupby('customer')['order_date'].min())
customer_data.columns = ['customer_first_order']
customer_data.head(2)

# combine first booking with our dummy data
df = pd.merge(df,customer_data.reset_index(),on='customer')
df.head(2)

#determine if a order is a repeat order or first order
df['type_of_order'] = np.where(df['order_date'] != df['customer_first_order'], 'repeat', 'first')