[Python] int() argument must be a string, a bytes-like object or a number, not 'tuple' will...

I am making a code to add an item to a database, however, I get the error

int() argument must be a string, a bytes-like object or a number, not 'tuple'


as I am trying to turn the information you get from a tuple when using the fetchall() function in python (i.e. (1,),(2,),(3,) into an int, however I do not know how to do this. Here is the code I am working on.

try:
adding_item_name = input("What would you like to name the item to be? >>> ")
adding_item_value = input("What would you like the value of the item to be? >>> ")
adding_item_quantity = int(input("What would you like the quantity to be? >>> "))
cursor.execute('SELECT item_ID FROM Items_in_stock ORDER BY item_ID')
adding_item_ID = int(cursor.fetchall()[-1])
adding_item_ID += 1
print(adding_item_ID)
print(adding_item_ID2)
cursor.execute('INSERT INTO Items_in_stock (item_ID, item_name, item_value, item_quantity) VALUES (?,?,?,?)',
(adding_item_ID_int, adding_item_name, adding_item_value, adding_item_quantity,))
print("Added item successfully")
except Exception as e:
print(str(e))
print("Unable to add item")


I have tried to do this:

x = [0, 1, 2]
y = ''.join(map(str, x))
z = int(y)


but to no avail.

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