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Learn it your way
A short class with Sarah and her students. The other ways are under More.
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Today we’re going to explore keyword arguments. Can anyone tell me what they think would differ from positional arguments?
I think positional arguments rely on the order of parameters, right?
Exactly! So, with positional arguments, values must be passed in the order that parameters are defined. Keyword arguments, on the other hand, let us specify which parameters to fill directly. This means we can specify age=17 before name="Alice".
So, you can switch the order when using keyword arguments?
Correct! This is really helpful, especially when working with functions that take several arguments, making your code clearer. Let's have a mini-quiz: If student(name='John', age=20) is called, what would you get if you called student(age=20, name='John'), Student_3?
The same output, right? It should still print 'John 20'.
That's right! You're getting the hang of it. Remember, clarity is key when programming.
Now let's talk about the benefits of using keyword arguments. Why do you think they are useful?
Maybe they make code cleaner since we can see what values relate to which parameters?
Absolutely! This notation adds a layer of clarity, especially in functions that can take many arguments. Plus, it allows us to skip parameters that have a default value, which helps simplify function calls. Can anyone give me an example of when you might want to skip a parameter?
Like when you're fine with a default age, if the function sets a default age?
Exactly! This makes your code shorter and more readable.
When calling with names, be clear and true, keyword arguments make it easy for you.
Imagine a treasure map that labels each spot. Each keyword is a name, guiding you not to get lost.
KISS: Keep It Simple with Specific names when using keyword arguments.
KAG: Keyword Arguments Good (for readability).
Term
Keyword Argument
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Term
Default Argument
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Keyword arguments are a way to pass parameters to functions by explicitly specifying parameter names.
In Python, keyword arguments enable callers to pass values to function parameters using their names, enhancing code readability and flexibility. This approach is particularly useful when functions have many parameters, allowing the omission of parameters that will use default values.
Keyword arguments allow the caller to pass arguments to a function by specifying the parameter names. They enhance the clarity and readability of the code, especially in cases where a function accepts multiple arguments, some of which may have default values.
parameter=value). This method allows parameters to be specified out of order.To define a function that accepts name and age but allows the caller to choose which to provide first:
def student(name, age):
print(name, age)This can be called using:
student(age=17, name="Alice")This flexibility makes keyword arguments a powerful feature in Python, improving both writing and maintaining the code.