PYTHON

args kwargs python

>>> def argsKwargs(*args, **kwargs):
...     print(args)
...     print(kwargs)
... 
>>> argsKwargs('1', 1, 'slgotting.com', upvote='yes', is_true=True, test=1, sufficient_example=True)
('1', 1, 'slgotting.com')
{'upvote': 'yes', 'is_true': True, 'test': 1, 'sufficient_example': True}

what are args and kwargs in python

# Python program to illustrate   
# **kwargs for variable number of keyword arguments 
  
def info(**kwargs):  
    for key, value in kwargs.items(): 
        print ("%s == %s" %(key, value)) 
  
# Driver code 
info(first ='This', mid ='is', last='Me')     

pass args and kwargs to funcitons

#1. When used as part of a function definition
	def f(self, *args, **kwargs):
	
    #it is used to signify an arbitrary number of positional or 
	#keyword arguments, respectively. 
	#The point to remember is that inside the function args will be a tuple, 
	#and kwargs will be a dict.
#2. When used as part of a function call,
	args = (1, 2)
	kwargs = {'last': 'Doe', 'first': 'John'}
	self.f(*args, **kwargs)
	#the * and ** act as unpacking operators. 
    #args must be an iterable, and kwargs must be dict-like. 
    #The items in args will be unpacked and sent to the function 
    #as positional arguments, and the key/value pairs in kwargs 
    #will be sent to the function as keyword arguments. 
#Thus,
	self.f(*args, **kwargs)
#is equivalent to
	self.f(1, 2, last='Doe', first='John')

python *args and **kwargs

def foo(*args):
    for a in args:
        print(a)        

foo(1)
# 1

foo(1,2,3)
# 1
# 2
# 3

Using **kwargs to pass the variable keyword arguments to the function

# Welcome to softhunt.net
def intro(**data):
    print("
Data type of argument:",type(data))

    for key, value in data.items():
        print("{} is {}".format(key,value))

intro(Firstname="Ranjeet", Lastname="Kumar", Age=22, Phone=1122334455)
intro(Firstname="Softhunt", Lastname=".net", Email="softhunt.net@gmail.com", Country="Pakistan", Age=22, Phone=1122334455)

**kwargs,*args

def myFun(arg1, arg2, arg3):
    print("arg1:", arg1)
    print("arg2:", arg2)
    print("arg3:", arg3)
 
 
# Now we can use *args or **kwargs to
# pass arguments to this function :
args = ("Geeks", "for", "Geeks")
myFun(*args)
 
kwargs = {"arg1": "Geeks", "arg2": "for", "arg3": "Geeks"}
myFun(**kwargs)