Pass Kwargs to Another Function in Python

Pass Kwargs to Another Function in Python

  1. Keyword Arguments in Python
  2. Call Function With**kwargs in Python
  3. Pass kwargs to Another Function With Python
  4. Conclusion

Python lists the two types of arguments that can be passed to functions in the program. The Non-keyword Arguments ( **args ) and Keyword Argument (**kwargs ) .

Usually, python functions have to call with the correct number of arguments. If the function expects two arguments, we should pass only two.

In this article, we’re going to discuss how to use keyword arguments and how to pass keyword arguments to another function.

Keyword Arguments in Python

Generally, arguments do pass information into functions. Keyword Argument is one method that can be used to pass arguments to the function.

Especially using Keyword Arguments, we can send arguments with key = value syntax. Let’s look at the following example.

def keyword_function(fname,lname,age):
    print("first name is " + fname )

keyword_function(fname= "Anne",lname= "Steaven" ,age= 27)

This example defined a function called keyword_function. It passes three arguments named fname, lname, and age.

So, these arguments are sent as keyword arguments because when the function calls in the program, it takes key and value pairs for each argument.

Output:

Print a statement by passing an argument to the function

In the above output, we print a statement passing the fname argument.

Call Function With**kwargs in Python

Mainly Keyword Arguments can be used when several arguments are unknown. In that case, add two asterisks(**) before the parameter name in the function definition.

If the function has a **kwargs parameter, it accepts a variable number of keyword arguments as a dictionary.

Give thought to the following example.

def animals(**kwargs):
    print(kwargs)

animals(name1='Rabbit',name2='Dog',name3='Monkey')

There is a function called animals in the above code. It has a parameter called **kwargs, the function call with three arguments as keyword arguments.

Output:

Call Function With **kwargs in Python

We can see the result as a dictionary with two pairs of values and keys. The kwargs argument is convention.

So, as a parameter name, we can use any meaningful name. As the same, this is how they call a function with the **kwargs parameter.

Pass kwargs to Another Function With Python

Code:

def info(**):
    x = dict(name="shen",age=27,degree="SE")
    pass_func(**x)

def pass_func(**kwargs):
    for i in kwargs:
        print(i,kwargs[i])
info()

Using the above code, we print information about the person, such as name, age, and degree. This program passes kwargs to another function which includes variable x declaring the dict method.

Example defined function info without any parameter. The function info declared a variable x which defined three key-value pairs, and usually, the key-value pair define in dictionary type in Python.

Consequently, the dict method specifies pair of keys and values. Since kwargs unpack arguments are declared as a dictionary type, we can use the dict method for this example.

Then we have another function called pass_func, which passes kwargs arguments. This function includes a for loop that prints kwargs arguments, and after that, we can pass the kwargs function to the info function to print x.

So, we call pass_func with the kwargs argument to the x variable. Finally, we call the info function in the pass_func function.

Output:

Pass kwargs to Another Function With Python

Conclusion

Throughout the article, we focused on how to pass kwargs to another function. The kwargs arguments can get several variables without a defined parameter for each argument.

When passing the kwargs argument to the function, It must use double asterisks with the parameter name **kwargs. When passing kwargs to another function, first, create a parameter with two asterisks, and then we can pass that function to another function as our purpose.

Migel Hewage Nimesha avatar Migel Hewage Nimesha avatar

Nimesha is a Full-stack Software Engineer for more than five years, he loves technology, as technology has the power to solve our many problems within just a minute. He have been contributing to various projects over the last 5+ years and working with almost all the so-called 03 tiers(DB, M-Tier, and Client). Recently, he has started working with DevOps technologies such as Azure administration, Kubernetes, Terraform automation, and Bash scripting as well.

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