Experiment Objectives

This guide demonstrates practical applications of Python's sequence data structures, including lists, tuples, dictionaries, and sets. The objectives are to:

• Master Python's built-in sequence types: lists, tuples, dictionaries, and sets.
• Understand how to manipulate these structures using operators and built-in functions.
• Learn the mechanics of list comprehensions and generator expressions.
• Apply slicing and sequence unpacking techniques.

1. Storing Student Information

---

Store student details (ID, name, college, major) in a single variable using a dictionary.

info_fields = ['student_id', 'name', 'college', 'major']
student_profile = {}

for field in info_fields:
    student_profile[field] = input(f"Enter your {field}: ")

print("
Student Profile:")
for key, value in student_profile.items():
    print(f"{key}: {value}")

2. Managing a Group Member List

---

Create a list to storre the names of group members.

group_members = []

num_members = int(input("How many members are in your group? "))
for _ in range(num_members):
    member_name = input("Enter a member's name: ")
    group_members.append(member_name)

print("
Group Members:", group_members)

3. Modifying the Group List

---

Perform operations on the group list: add, remove, and update member names.

def manage_group_list(members):
    while True:
        print("
Current Members:", members)
        print("1. Add a member")
        print("2. Remove a member")
        print("3. Update a member's name")
        print("0. Exit")
        choice = input("Select an action: ")

        if choice == '1':
            new_member = input("Enter the name to add: ")
            members.append(new_member)
        elif choice == '2':
            name_to_remove = input("Enter the name to remove: ")
            if name_to_remove in members:
                members.remove(name_to_remove)
            else:
                print(f"{name_to_remove} not found in the list.")
        elif choice == '3':
            old_name = input("Enter the name to update: ")
            if old_name in members:
                new_name = input("Enter the new name: ")
                index = members.index(old_name)
                members[index] = new_name
            else:
                print(f"{old_name} not found in the list.")
        elif choice == '0':
            break
        else:
            print("Invalid choice. Please try again.")

manage_group_list(group_members)

4. Extracting Unique Surnames

---

Input surnames and use a set to display the unique ones.

surnames_input = input("Enter group members' surnames separated by space: ")
surnames_set = set(surnames_input.split())

print("
Unique Surnames in the Group:", surnames_set)

5. Calculating Group Statistics

---

Store member names and their Python scores, then calculate total members, total score, and average score.

member_scores = []

num_members = int(input("How many members' scores to enter? "))
for i in range(num_members):
    name = input(f"Enter name for member {i+1}: ")
    score = int(input(f"Enter {name}'s score: "))
    member_scores.append((name, score))

total_members = len(member_scores)
total_score = sum(score for _, score in member_scores)
average_score = total_score / total_members

print(f"
Total Members: {total_members}")
print(f"Total Score: {total_score}")
print(f"Average Score: {average_score:.2f}")

6. Filtering Failing Scores

---

Use a list comprehension to filter out scores that are below 60.

all_scores = list(map(int, input("Enter scores separated by space: ").split()))
failing_scores = [score for score in all_scores if score < 60]

print("Scores below 60:", failing_scores)

7. Extracting Integers from a Mixed List

---

Use a list comprehension to extract only the integer elements from a mixed-type list.

mixed_data = [123, 'hello', (1, 2), 456, {23}, {'a': 789}]
integers_only = [item for item in mixed_data if isinstance(item, int)]

print("Extracted integers:", integers_only)

8. Using a Generator Expression

---

Generate numbers from 0 to 9, multip each by a lucky number, and convert the result to a list.

lucky_number = int(input("Enter your lucky number: "))

# Generator expression
generator = (num * lucky_number for num in range(10))

# Convert generator to a list
result_list = list(generator)

print("Generated and multiplied list:", result_list)

9. Modifying a List with insert() and Slicing

---

Transform a list using both the insert() method and slicing to achieve the same result.

original_list = ["今天", "天气", "真好"]
modified_list = original_list.copy()

# Method 1: Using insert()
modified_list.insert(1, '的')
modified_list.insert(3, '是')
modified_list.insert(5, '呀')
print("Using insert():", modified_list)

# Method 2: Using slicing
original_list = ["今天", "天气", "真好"]
modified_list = original_list.copy()
modified_list[1:1] = ['的']
modified_list[3:3] = ['是']
modified_list[5:5] = ['呀']
print("Using slicing:", modified_list)

10. Shopping Cart Simulation

---

Simulate a shopping cart, calculate the total cost, and check against a user-provided budget.

shopping_cart = [
    {"name": "床", "price": 1999, "num": 1},
    {"name": "枕头", "price": 10, "num": 2},
    {"name": "被子", "price": 20, "num": 1}
]

print("Your Shopping Cart:")
for item in shopping_cart:
    print(f"- {item['name']}: {item['num']} x ${item['price']} = ${item['price'] * item['num']}")

cart_total = sum(item['price'] * item['num'] for item in shopping_cart)
budget = int(input("
Enter your total budget: "))

if cart_total > budget:
    print(f"Purchase failed. Insufficient funds. Total: ${cart_total}, Budget: ${budget}.")
else:
    print(f"Purchase successful! Total: ${cart_total}.")