Question

what happens when you run the following code?
my_tuple = (1, 2, 3)
my_tuple.append(4)
print(my_tuple)
the tuple is modified to (1, 2, 3, 4)
the code runs without any issues.
the code raises an attributeerror because tuples dont have an append method.
the code raises a typeerror because tuples are immutable.
question 7
1 pts
which data structure uses keys to access its values?
string
list
tuple
dictionary

Explanation:

• For the first code - related question:
• Tuples in Python are immutable data structures. They do not have an append method. When we try to call my_tuple.append(4), Python checks if the append attribute exists for the my_tuple object (which is of type tuple). Since tuples do not have an append method, it raises an AttributeError.
• If it were a TypeError (as in the option "The code raises a TypeError because tuples are immutable"), it would be related to an operation that tries to modify the tuple in a way that is conceptually wrong for its type (e.g., trying to re - assign an element by index in a wrong - type context). But here, the error is specifically about the non - existence of the append method.
• For the data - structure question:
• A string is accessed by index. For example, s = "hello", s[0] gives 'h'.
• A list is also accessed by index. For example, l = [1, 2, 3], l[0]=1.
• A tuple is accessed by index. For example, t=(1, 2, 3), t[0]=1.
• A dictionary is a key - value store. We access its values using keys. For example, d = {"key1": "value1", "key2": "value2"}, d["key1"] gives "value1".

Answer:

• First question: C. The code raises an AttributeError because tuples don't have an append method.
• Second question: D. Dictionary