Script to send email to the recipients when ever there is slot available for vaccine

vaccine.py

import datetime as dt
import requests
from smtplib import SMTP
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
import time
import pandas as pd
from requests.sessions import session

SENDER_EMAIL = "sender-email@mail.com"
SENDER_PASS = "your-app-secret-password"


def get_data():
    data = list()
    date = (dt.datetime.now() + dt.timedelta(hours=5, minutes=30)).strftime("%d-%m-%Y")
    pincodes = ["721", "725"]  # Added Howrah, Kolkata (id of the respective district)
    for pincode in pincodes:
        url = f"http://cdn-api.co-vin.in/api/v2/appointment/sessions/public/calendarByDistrict?district_id={pincode}&date={date}"
        headers = {
            "User-Agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36",
            "authority": "cdn-api.co-vin.in",
        }
        r = requests.get(url, headers=headers)
        if r.status_code != 200:
            return data
        try:
            d = r.json()
            for center in d["centers"]:
                name = center["name"]
                [
                    data.append([pincode, name, session["date"], session["vaccine"]])
                    for session in center["sessions"]
                    if (session["min_age_limit"] == 18 and session["available_capacity_dose2"]>0 and center["fee_type"] == "Free" and session["vaccine"] == "COVISHIELD")
                ]
        except Exception as e:
            print(f"exception occured with the type {e}")
    return data


def create_df(data):
    headers = ["pincode", "name", "date", "vaccine"]
    df = pd.DataFrame(data, columns=headers)
    df.index += 1
    return df


def send_email(recipients, df):
    message = MIMEMultipart()
    message["Subject"] = "[IMPORTANT] Slots available for COVID-19 Vaccine!"
    message["From"] = SENDER_EMAIL
    message.attach(MIMEText(df.to_html(), "html"))
    message["To"] = ", ".join(recipients)
    msg_body = message.as_string()

    server = SMTP("smtp.gmail.com", 587)
    server.starttls()
    server.login(message["From"], SENDER_PASS)
    server.sendmail(message["From"], message["To"], msg_body)
    server.quit()

    print("Email sent!!")


while True:
    try:
        data = get_data()
        if len(data):
            df = create_df(data)
            send_email(["receiver-email-1@mail.com"], df)
        time.sleep(4.28)
    except KeyboardInterrupt:
        print("\nEnded search\n")
        exit(1)