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Python Functions Tutorial

1. What is a Function in Python?

What Is Function?Challenge: Building Functions Arguments Return Value Function Body Built-in Functions

2. Positional and Optional Arguments

Positional Arguments Challenge: Positional Arguments Optional Arguments Challenge: Optional Arguments

3. Arbitrary Arguments

Arbitrary Arguments Arbitrary Keyword Arguments Combination of Positional and Optional Arguments

4. Function Return Value Specification

Single Return Value Multiple Return Values None Return Value Generator Functions Challenge: Automated Bus Announcements

5. Recursion and Lambda Functions

Recursion Challenge: Recursive File Search Lambda Functions Immediately Invoked Lambda Expression Writing Effective and Maintainable Functions

Arbitrary Keyword Arguments

In programming, there is a special syntax for passing any number of named parameters to a function, known as **kwargs.

**kwargs allows a function to accept any number of named arguments and treat them as a dictionary.


              123456
            
def example_function(**kwargs):
    for key, value in kwargs.items():
        print(f'{key}: {value}')

# Example function call
example_function(name='John', age=25, city='New York')

In this example, **kwargs receives named arguments and prints their keys and values.

Note

The .items() method is used to obtain a list of key-value pairs from a dictionary in Python. Each element in this list is represented as a tuple (key, value).

Opgave

Swipe to start coding

Implement a function that filters products based on a given budget. The function should return a list of affordable products or indicate if no products are available within the budget.

You’re given the function filter_products_by_budget with input parameters budget and arbitrary keyword arguments (kwargs).
In the for loop, use the items() method on kwargs to retrieve the product and price variables.
Check if the budget variable is greater than or equal to the price variable.
If the condition is met, add the product to the affordable_products dictionary, where the key is the product variable and the value is the price variable.
If no products are within the budget, return the message "No products available within the budget."
If at least one affordable product is found, Return the message "Available products within budget: {affordable_products}", where {affordable_products} is the dictionary of available products.

Løsning

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Sektion 3. Kapitel 2

Arbitrary Keyword Arguments

In programming, there is a special syntax for passing any number of named parameters to a function, known as **kwargs.

**kwargs allows a function to accept any number of named arguments and treat them as a dictionary.


              123456
            
def example_function(**kwargs):
    for key, value in kwargs.items():
        print(f'{key}: {value}')

# Example function call
example_function(name='John', age=25, city='New York')

In this example, **kwargs receives named arguments and prints their keys and values.

Note

The .items() method is used to obtain a list of key-value pairs from a dictionary in Python. Each element in this list is represented as a tuple (key, value).

Opgave

Swipe to start coding

Implement a function that filters products based on a given budget. The function should return a list of affordable products or indicate if no products are available within the budget.

You’re given the function filter_products_by_budget with input parameters budget and arbitrary keyword arguments (kwargs).
In the for loop, use the items() method on kwargs to retrieve the product and price variables.
Check if the budget variable is greater than or equal to the price variable.
If the condition is met, add the product to the affordable_products dictionary, where the key is the product variable and the value is the price variable.
If no products are within the budget, return the message "No products available within the budget."
If at least one affordable product is found, Return the message "Available products within budget: {affordable_products}", where {affordable_products} is the dictionary of available products.

Løsning

Skift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder

Var alt klart?

Tak for dine kommentarer!

Sektion 3. Kapitel 2

Skift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående muligheder