Assignment

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1️⃣ Lists, Tuples, Dictionaries, Sets (6 Assignments)

Assignment 1: Creating and Accessing Lists

🔹 Task: Create a list of 5 numbers and print the third element. 🔹 Example Snippet:

numbers = [10, 20, 30, 40, 50]
print("Third element:", numbers[2])  # Indexing starts from 0

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Assignment 2: Modifying a List

🔹 Task: Append a new number to a list and remove an existing number. 🔹 Example Snippet:

numbers = [1, 2, 3, 4, 5]
numbers.append(6)
numbers.remove(3)
print("Updated list:", numbers)

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Assignment 3: Creating and Accessing a Tuple

🔹 Task: Create a tuple with 4 strings and print the second element. 🔹 Example Snippet:

fruits = ("apple", "banana", "cherry", "date")
print("Second fruit:", fruits[1])

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Assignment 4: Creating and Accessing a Dictionary

🔹 Task: Create a dictionary with name, age, and city and print the age. 🔹 Example Snippet:

person = {"name": "Alice", "age": 25, "city": "New York"}
print("Age:", person["age"])

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Assignment 5: Modifying a Dictionary

🔹 Task: Update a dictionary key-value pair and add a new key. 🔹 Example Snippet:

person = {"name": "Alice", "age": 25}
person["age"] = 26  # Updating existing key
person["city"] = "New York"  # Adding a new key
print(person)

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Assignment 6: Creating and Using a Set

🔹 Task: Create a set, add a new element, and remove an existing element. 🔹 Example Snippet:

unique_numbers = {1, 2, 3, 4}
unique_numbers.add(5)
unique_numbers.remove(2)
print(unique_numbers)

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2️⃣ List & Dictionary Comprehensions (4 Assignments)

Assignment 7: List Comprehension (Squares of Numbers)

🔹 Task: Create a list of squares of numbers from 1 to 5 using list comprehension. 🔹 Example Snippet:

squares = [x**2 for x in range(1, 6)]
print(squares)

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Assignment 8: List Comprehension (Even Numbers)

🔹 Task: Create a list of even numbers from 1 to 10 using list comprehension. 🔹 Example Snippet:

evens = [x for x in range(1, 11) if x % 2 == 0]
print(evens)

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Assignment 9: Dictionary Comprehension (Number Squares)

🔹 Task: Create a dictionary where keys are numbers 1 to 5 and values are their squares. 🔹 Example Snippet:

squares_dict = {x: x**2 for x in range(1, 6)}
print(squares_dict)

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Assignment 10: Dictionary Comprehension (Character Mapping)

🔹 Task: Create a dictionary mapping characters to their ASCII values for 'a' to 'e'. 🔹 Example Snippet:

ascii_map = {char: ord(char) for char in "abcde"}
print(ascii_map)

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3️⃣ Exception Handling (try-except-finally) (6 Assignments)

Assignment 11: Handling Division by Zero Error

🔹 Task: Handle division by zero error using try-except. 🔹 Example Snippet:

try:
    result = 10 / 0
except ZeroDivisionError:
    print("Cannot divide by zero!")

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Assignment 12: Handling Multiple Exceptions

🔹 Task: Handle multiple types of exceptions (zero division and value error). 🔹 Example Snippet:

try:
    num = int(input("Enter a number: "))
    result = 10 / num
except ZeroDivisionError:
    print("Cannot divide by zero!")
except ValueError:
    print("Invalid input! Please enter a number.")

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Assignment 13: Using Finally Block

🔹 Task: Use finally to always print a message after exception handling. 🔹 Example Snippet:

try:
    num = int(input("Enter a number: "))
    result = 10 / num
except ZeroDivisionError:
    print("Cannot divide by zero!")
finally:
    print("Execution complete.")

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Assignment 14: Raising Custom Exceptions

🔹 Task: Raise a custom exception when a number is negative. 🔹 Example Snippet:

def check_number(n):
    if n < 0:
        raise ValueError("Negative numbers are not allowed!")
    return n

try:
    check_number(-5)
except ValueError as e:
    print(e)

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Assignment 15: Handling File Not Found Error

🔹 Task: Handle an error when trying to read a non-existent file. 🔹 Example Snippet:

try:
    with open("non_existent_file.txt", "r") as file:
        content = file.read()
except FileNotFoundError:
    print("File not found!")

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Assignment 16: Nested Try-Except Blocks

🔹 Task: Use nested try-except blocks to handle different errors. 🔹 Example Snippet:

try:
    num = int(input("Enter a number: "))
    try:
        result = 10 / num
    except ZeroDivisionError:
        print("Cannot divide by zero!")
except ValueError:
    print("Invalid input! Please enter a number.")

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4️⃣ File Handling (reading/writing files, CSV, JSON) (4 Assignments)

Assignment 17: Writing to a File

🔹 Task: Write a message to a file named output.txt. 🔹 Example Snippet:

with open("output.txt", "w") as file:
    file.write("Hello, Python File Handling!")

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Assignment 18: Reading from a File

🔹 Task: Read and print the contents of output.txt. 🔹 Example Snippet:

with open("output.txt", "r") as file:
    content = file.read()
    print(content)

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Assignment 19: Reading a CSV File

🔹 Task: Read a CSV file and print each row. 🔹 Example Snippet:

import csv

with open("data.csv", "r") as file:
    reader = csv.reader(file)
    for row in reader:
        print(row)

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Assignment 20: Working with JSON Files

🔹 Task: Write and read a dictionary as JSON. 🔹 Example Snippet:

import json

data = {"name": "Alice", "age": 25}

# Writing to JSON
with open("data.json", "w") as file:
    json.dump(data, file)

# Reading from JSON
with open("data.json", "r") as file:
    loaded_data = json.load(file)
    print(loaded_data)

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