Python AttributeError: 'tuple' object has no attribute 'append'

Question

last_semester_gradebook = [["politics", 80], ["latin", 96], ["dance", 97], ["architecture", 65]]

# Your code below:
subjects = ["physics", "calculus", "poetry", "history"]

gardes = [98, 97, 85, 88]

gradebook = [["physics", 98], ["calculus", 97], ["poetry", 85]], ["history", 88]
print(gradebook)

gradebook.append(["computer science", 100])

Answer 1

gradebook = [ ["physics", 98], ["calculus", 97], ["poetry", 85], ["history", 88]
]

Misplaced of ']' in the definition of <gradebook> list.

Answer 2

My guess is try using a list instead of a tuple. I think tuples don't have methods like that because they're immutable.