repeating insuline values with time gaps

insuline_repeat.py

from datetime import datetime, date, timedelta

csv = """\
01/01/2018,38
12/01/2018,38
15/01/2018,34
22/01/2018,34
25/01/2018,38
31/01/2018,40
02/02/2018,36
"""

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

    data = []
    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)
        data.append([day_str, insuline])

    return data

def gid():
    return generate_interpolation_data(csv_data)

print(gid())