def update_unit(name, expiredate, new_quantity):
    connection = sqlite3.connect('aybdb-edb')
    cursor = connection.cursor()
    cursor.execute('UPDATE main SET quantity=:new_quantity WHERE name=:name and expiredate=:expiredate', {'new_quantity': new_quantity, 'name': name, 'expiredate': expiredate})
    connection.commit()
    connection.close()

def update_unit(name, expiredate, new_quantity):
    print(type(name))
    ...