Podcast
Questions and Answers
What symbol is used in Python to apply decorators to a function?
What symbol is used in Python to apply decorators to a function?
What is necessary when defining a decorator that takes arguments?
What is necessary when defining a decorator that takes arguments?
Which of the following allows a decorator to accept any number of arguments?
Which of the following allows a decorator to accept any number of arguments?
What must be passed to a decorator function when using decorators in Python?
What must be passed to a decorator function when using decorators in Python?
Signup and view all the answers
Why would someone use a general purpose decorator?
Why would someone use a general purpose decorator?
Signup and view all the answers
What is the primary purpose of a decorator in Python?
What is the primary purpose of a decorator in Python?
Signup and view all the answers
How are decorators typically applied in Python?
How are decorators typically applied in Python?
Signup and view all the answers
What best describes 'first class citizens' in Python concerning functions?
What best describes 'first class citizens' in Python concerning functions?
Signup and view all the answers
What is another term for inner functions that are used in decorators?
What is another term for inner functions that are used in decorators?
Signup and view all the answers
What ability allows a nested function to access the outer enclosing function in Python?
What ability allows a nested function to access the outer enclosing function in Python?
Signup and view all the answers
When creating a basic decorator to capitalize each word in a sentence, which of the following is essential?
When creating a basic decorator to capitalize each word in a sentence, which of the following is essential?
Signup and view all the answers
What is a key characteristic of functions in Python regarding their structure?
What is a key characteristic of functions in Python regarding their structure?
Signup and view all the answers
What happens when a function is wrapped by a decorator?
What happens when a function is wrapped by a decorator?
Signup and view all the answers
Study Notes
Python Decorators
- Decorators are design patterns enhancing existing objects (typically functions) without altering their structure.
- They significantly impact function behavior, adding functionalities.
- Positioned before the function definition needing modification.
- Python functions are first-class citizens, enabling their use as arguments, return values, assignment to variables, and modification.
- This flexibility allows functions to be treated like general objects.
Decorator Example
- A
plus_onefunction adds 1 to a given number. - Assigning the function to a variable (
add_one = plus_one) allows calling the original function through the alias. -
add_one(5)results in 6.
Inner Functions/Wrapper Functions
- Functions can be nested within other functions.
- Sometimes, inner functions are called wrapper functions.
Decorators Accepting Arguments
- Decorators can accept arguments, which are passed to the wrapper function.
- These arguments then get transferred to the original function which is being decorated.
General Purpose Decorators
- Decorators can adapt to any function.
- *args and **kwargs allow multiple argument handling.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
This quiz dives into the concept of decorators in Python, a powerful design pattern that enhances the functionality of existing functions. You'll explore how decorators modify behavior and learn about inner functions, wrapper functions, and decorators that accept arguments. Test your knowledge and understanding of these advanced Python features!
