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python *args vs **kargs

Charles-Alexandre Roy answered on June 2, 2023 Popularity 9/10 Helpfulness 3/10

answer python *args vs **kargs

python *args vs **kargs

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# Short answer:
# *args allows you to pass a variable number of unnamed values to a function
# **kwargs allows you to pass a variable number of named values to a function

# Example usage for args:
def using_args(*args):
	print(args)
    print(args[1]) # can subscript args to access subset

# Passing 3 arguments:
using_args("a", "b", "c")
--> ('a', 'b', 'c')
	b

# Passing 1 argument (here we get an error because of the subscripting):
using_args("a")
--> ('a',)
	IndexError: tuple index out of range

# Example usage for kwargs:
def using_kwargs(**kwargs):
	print(kwargs)
    print(kwargs["b"])

# Passing 3 named arguments:
using_kwargs(a=1, b=2, c=3)
--> {'a': 1, 'b': 2, 'c': 3}
	1
    
# Passing 1 named argument (here we get an error because we try to use a key
#	that doesn't exist in the dictionary):
using_kwargs(a=1)
--> {'a': 1}
	KeyError: 'b'

# Note, *args gets read in as a tuple, **kwargs gets read in as a dict
# Note, you don't have to use *args and **kwargs, you could use e.g. *your_name
# Note, arguments should be passed in this order:
#	Formal arguments, *args, Keyword arguments, **kwargs
#	For example:
#	def printOrder(coffee, *args, coffee_order="Espresso", **kwargs):

Popularity 9/10 Helpfulness 3/10 Language python

Source: careerkarma.com

Tags: in-function parameters python

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Contributed on Jun 02 2023

Charles-Alexandre Roy

0 Answers Avg Quality 2/10

python *args vs **kargs

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