Зміст курсу

Структури Даних в Python

1. Список

Створення Списку Індексація Списків Вкладений Список Довжина Списку Редагування Списків Метод append()Метод insert()Видалення Елементів Вилучення Елементів Генератор Списків

2. Словник

Створення Словника Вилучення Інформації Accessing Dictionary Keys Додавання Eлементів Челендж Видалення зі Словника Метод pop()Метод popitem()Метод clear()Генератор Словників Dictionary Comprehension with Condition

3. Кортеж

Створення Кортежу Доступ до Елементів Кортежу Об'єднання Кортежів Операції Видалення Редагування Кортежу Додавання Елементів Челендж Finding Elements in a Tuple

4. Множина

Створення Множини Метод add()Метод update()Доступ до Елементів Множини Методи remove() та discard()Метод clear()

Dictionary Comprehension with Condition

You can include a condition in a dictionary comprehension to filter items. For example, let's create a dictionary of books published before 1950:


              1234567891011
            
books = [
    ["Pride and Prejudice", 1813],
    ["1984", 1949],
    ["To Kill a Mockingbird", 1960],
    ["The Great Gatsby", 1925]
]

# Filter books published before 1950
books_dictionary = {title: year for title, year in books if year < 1950}

print(books_dictionary)

Adding a condition allows you to filter data dynamically while creating the dictionary.

Here's the equivalent code using a for loop instead of a dictionary comprehension:


              123456789101112131415
            
books = [
    ("Pride and Prejudice", 1813),
    ("1984", 1949),
    ("To Kill a Mockingbird", 1960),
    ("The Great Gatsby", 1925)
]

# Filter books published before 1950 using a for loop
filtered_books = {}

for title, year in books:
    if year < 1950:
        filtered_books[title] = year

print(filtered_books)

Завдання

Swipe to show code editor

The bookstore wants to create a dictionary of books that cost less than $12. Use dictionary comprehension with a condition to create a new dictionary called discount_books from the following list of lists:

Iterate through the books list by unpacking its elements (lists) into title and price.
Apply the filter if price < 12 in the comprehension to include only books with a price below $12.

Перейдіть на комп'ютер для реальної практикиПродовжуйте з того місця, де ви зупинились, використовуючи один з наведених нижче варіантів

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Дякуємо за ваш відгук!

Секція 2. Розділ 11

Dictionary Comprehension with Condition

You can include a condition in a dictionary comprehension to filter items. For example, let's create a dictionary of books published before 1950:


              1234567891011
            
books = [
    ["Pride and Prejudice", 1813],
    ["1984", 1949],
    ["To Kill a Mockingbird", 1960],
    ["The Great Gatsby", 1925]
]

# Filter books published before 1950
books_dictionary = {title: year for title, year in books if year < 1950}

print(books_dictionary)

Adding a condition allows you to filter data dynamically while creating the dictionary.

Here's the equivalent code using a for loop instead of a dictionary comprehension:


              123456789101112131415
            
books = [
    ("Pride and Prejudice", 1813),
    ("1984", 1949),
    ("To Kill a Mockingbird", 1960),
    ("The Great Gatsby", 1925)
]

# Filter books published before 1950 using a for loop
filtered_books = {}

for title, year in books:
    if year < 1950:
        filtered_books[title] = year

print(filtered_books)

Завдання

Swipe to show code editor

Iterate through the books list by unpacking its elements (lists) into title and price.
Apply the filter if price < 12 in the comprehension to include only books with a price below $12.

Все було зрозуміло?

Дякуємо за ваш відгук!

Секція 2. Розділ 11

Dictionary Comprehension with Condition

You can include a condition in a dictionary comprehension to filter items. For example, let's create a dictionary of books published before 1950:


              1234567891011
            
books = [
    ["Pride and Prejudice", 1813],
    ["1984", 1949],
    ["To Kill a Mockingbird", 1960],
    ["The Great Gatsby", 1925]
]

# Filter books published before 1950
books_dictionary = {title: year for title, year in books if year < 1950}

print(books_dictionary)

Adding a condition allows you to filter data dynamically while creating the dictionary.

Here's the equivalent code using a for loop instead of a dictionary comprehension:


              123456789101112131415
            
books = [
    ("Pride and Prejudice", 1813),
    ("1984", 1949),
    ("To Kill a Mockingbird", 1960),
    ("The Great Gatsby", 1925)
]

# Filter books published before 1950 using a for loop
filtered_books = {}

for title, year in books:
    if year < 1950:
        filtered_books[title] = year

print(filtered_books)

Завдання

Swipe to show code editor

Iterate through the books list by unpacking its elements (lists) into title and price.
Apply the filter if price < 12 in the comprehension to include only books with a price below $12.

Все було зрозуміло?

Дякуємо за ваш відгук!

You can include a condition in a dictionary comprehension to filter items. For example, let's create a dictionary of books published before 1950:


              1234567891011
            
books = [
    ["Pride and Prejudice", 1813],
    ["1984", 1949],
    ["To Kill a Mockingbird", 1960],
    ["The Great Gatsby", 1925]
]

# Filter books published before 1950
books_dictionary = {title: year for title, year in books if year < 1950}

print(books_dictionary)

Adding a condition allows you to filter data dynamically while creating the dictionary.

Here's the equivalent code using a for loop instead of a dictionary comprehension:


              123456789101112131415
            
books = [
    ("Pride and Prejudice", 1813),
    ("1984", 1949),
    ("To Kill a Mockingbird", 1960),
    ("The Great Gatsby", 1925)
]

# Filter books published before 1950 using a for loop
filtered_books = {}

for title, year in books:
    if year < 1950:
        filtered_books[title] = year

print(filtered_books)

Завдання

Swipe to show code editor

Iterate through the books list by unpacking its elements (lists) into title and price.
Apply the filter if price < 12 in the comprehension to include only books with a price below $12.

Секція 2. Розділ 11