import sqlite3

connection = sqlite3.connect("people")
cur = connection.cursor()

while True:
    first_name = input("Please enter first name:")
    if len(first_name) < 1: break
    last_name = input("Please enter last name:")
    age = input("Please insert age")
    try:
        age = int(age)
    except:
        break

    occupation = input("Please inster occupation:")

    cur.execute("INSERT INTO people (first_name, last_name, age, occupation) VALUES ('%s', '%s', %d, '%s')" % (first_name, last_name, age, occupation))
    print(age)

connection.commit()
connection.close()