csv data point interpolator stepwise

csv_data_interpolator_steps.py

from datetime import datetime, date, timedelta

csv = """\
12/08/2017,34
13/08/2017,38
23/08/2017,39
03/09/2017,34
13/09/2017,32
02/10/2017,30
"""

date_format = "%d/%m/%Y"

csv_data = []
for item in csv.splitlines():
    k, v = item.split(',')
    csv_data.append((k, int(v)))

csv_data_dict = {date: insuline for date, insuline in csv_data}


def generate_interpolation_data(csv_data):
    start = csv_data[0][0]
    end = csv_data[-1][0]
    
    a = datetime.strptime(start, date_format)
    b = datetime.strptime(end, date_format)
    delta = b - a
    num_days = delta.days

    insuline = 0
    for i in range(delta.days + 1):
        day = a + timedelta(days=i)
        day_str = day.strftime(date_format)
        insuline = csv_data_dict.get(day_str, insuline)
        print(day_str, insuline)


generate_interpolation_data(csv_data)