data_generation.py

import pandas as pd
import random
import datetime

def random_dt_bw(start_date,end_date):
    days_between = (end_date - start_date).days
    random_num_days = random.randrange(days_between)
    random_dt = start_date + datetime.timedelta(days=random_num_days)
    return random_dt

def generate_data(n=1000):
    items = [f"i_{x}" for x in range(n)]
    start_dates = [random_dt_bw(datetime.date(2020,1,1),datetime.date(2020,9,1)) for x in range(n)]
    end_dates = [x + datetime.timedelta(days=random.randint(1,10)) for x in start_dates]
    
    offerDf = pd.DataFrame({"Item":items,
                            "StartDt":start_dates,
                            "EndDt":end_dates})
    
    transaction_items = [f"i_{random.randint(0,n)}" for x in range(5*n)]
    transaction_dt = [random_dt_bw(datetime.date(2020,1,1),datetime.date(2020,9,1)) for x in range(5*n)]
    sales_amt = [random.randint(0,1000) for x in range(5*n)]
    
    transactionDf = pd.DataFrame({"Item":transaction_items,"TransactionDt":transaction_dt,"Sales":sales_amt})

    return offerDf,transactionDf