import smtplib

from email.message import EmailMessage

from getpass import getpass

name = str(input("Name: "))
email = str(input("Email: "))
password = str(getpass("Password: "))
recipient = str(input("Recipient's email: "))

while True:
    try:
        productsnm = int(input(f"Hi, {name}!nHow many products do you want to add to the shopping list? " ))
    except ValueError:
        print ("Please input a number.")
    else:
        break

products = []
quantities = []

for x in range(int(productsnm)):

    product = str(input("Input the product name: "))

    while True:
        try:
            quantity = int(input("Input the product quantity: "))
        except ValueError:
            print ("Please input a number.")
        else:
            break

    products.append(product)
    quantities.append(quantity)

print ("nThese products have been added to the shopping list:")

for x, y in zip(products, quantities):
    print (f'{x} x {y}')

gmail_user = email
gmail_password = password

msg = EmailMessage()
msg['Subject'] = "Shopping List"
msg['From'] = gmail_user
msg['To'] = [recipient]
message = ""
for i in range(max(len(products), len(quantities))):
    message = message + str(products[i]) + " x " + str(quantities[i]) + "n"
msg.set_content(message)

try:
    s = smtplib.SMTP_SSL('smtp.gmail.com', 465)
    s.ehlo()
    s.login(gmail_user, gmail_password)
    s.send_message(msg)
    s.quit()

    print ("nThe email has been sent.")

except:
    print ("nAn error occurred.")

print ("nHave a nice day!")

exit()

def get_user_input(message, type=str):
    """Ask the user for input using `message`.
    Enforce that the input is castable to `type` and cast it.
    """
    while True:
        try:
            return type(input(message))
        except ValueError:
            print (f"Please input a {type}.")

def add_item(shopping_list):
    """Add an item to the shopping list.
    If the item already exists in the list, add the quantity to it.
    """
    name = get_user_input("Input the product name: ")
    quantity = get_user_input("Input the product quantity: ", int)
    shopping_list[name] += quantity

def print_list(shopping_list):
    for name, quantity in shopping_list.items():
        print(name, "x", quantity)

def email_to(shopping_list, from_email, password, *recipients):
    email = EmailMessage()
    email['Subject'] = "Shopping List"
    email['From'] = from_email
    email['To'] = recipients
    message = "n".join(f"{name} x {quantity}" for name, quantity in shopping_list.items())
    email.set_content(message)

    try:
        s = smtplib.SMTP_SSL('smtp.gmail.com', 465)
        s.ehlo()
        s.login(from_user, password)
        s.send_message(email)
        s.quit()
        print ("nThe email has been sent.")
    except Exception as e:
        print ("nAn error occurred:", e)

import smtplib
from email.message import EmailMessage
from getpass import getpass
from collections import defaultdict

if __name__ == "__main__":
    name = input("Name: ")
    n = get_user_input(f"Hi, {name}!nHow many products do you want to add to the shopping list? ", int)
    shopping_list = defaultdict(int)
    for _ in range(n):
        add_item(shopping_list)
    print_list(shopping_list)

    email = input("Email: ")
    password = getpass("Password: ")
    recipient = input("Recipient's email: ")
    email_to(shopping_list, email, password, recipient)

class ShoppingList:
    def __init__(self):
        self.items = defaultdict(int)

    def __str__(self):
        return "n".join(f"{name} x {quantity}" for name, quantity in self.items.items())

    def add_item(self, name, quantity):
        self.items[name] += quantity

    def email_to(self, from_email, password, *recipients):
        ...

if __name__ == "__main__":
    name = input("Name: ")
    n = get_user_input(f"Hi, {name}!nHow many products do you want to add to the shopping list? ", int)
    shopping_list = ShoppingList()
    for _ in range(n):
        name = get_user_input("Input the product name: ")
        quantity = get_user_input("Input the product quantity: ", int)
        shopping_list.add_item(name, quantity)
    print(shopping_list)

    email = input("Email: ")
    password = getpass("Password: ")
    recipient = input("Recipient's email: ")
    shopping_list.email_to(email, password, recipient)

from collections import namedtuple
Product = namedtuple('Product', ['name', 'quantity'])
# inside the for-loop:
    products.append(Product(name=product_name, quantity=quantity))

[Product(name='n0', quantity=0), Product(name='n1', quantity=1), Product(name='n2', quantity=32)]