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Python: Passing Dictionary as Arguments to Function
  • Difficulty Level : Easy
  • Last Updated : 30 Jan, 2020

A dictionary in Python is a collection of data which is unordered and mutable. Unlike, numeric indices used by lists, a dictionary uses the key as an index for a specific value. It can be used to store unrelated data types but data that is related as a real-world entity. The keys themselves are employed for using a specific value.

Refer to the below article to get the idea about Python Dictionary.

Passing Dictionary as an argument

In Python, everything is an object, so the dictionary can be passed as an argument to a function like other variables are passed.

Example:






# Python program to demonstrate
# passing dictionary as argument
  
  
# A function that takes dictionary
# as an argument
def func(d):
      
    for key in d:
        print("key:", key, "Value:", d[key])
          
# Driver's code
D = {'a':1, 'b':2, 'c':3}
func(D)

Output:

key: b Value: 2
key: a Value: 1
key: c Value: 3

Passing Dictionary as kwargs

kwargs” stands for keyword arguments. It is used for passing advanced data objects like dictionaries to a function because in such functions one doesn’t have a clue about the number of arguments, hence data passed is be dealt properly by adding “**” to the passing type.

Example 1:




# Python program to demonstrate
# passing dictionary as kwargs
  
  
def display(**name):
      
    print (name["fname"]+" "+name["mname"]+" "+name["lname"])
  
def main():
      
    # passing dictionary key-value 
    # pair as arguments
    display(fname ="John",
            mname ="F."
            lname ="Kennedy")
# Driver's code
main()

Output:

John F. Kennedy

Example 2:




# Python program to demonstrate
# passing dictionary as kwargs
  
  
def display(x = 0, y = 0, **name):
      
    print (name["fname"]+" "+name["mname"]+" "+name["lname"])
    print ("x =", x)
    print ("y =", y)
  
def main():
    # passing dictionary key-value 
    # pair with other arguments
    display(2, fname ="John", mname ="F.", lname ="Kennedy")
      
# Driver's code
main()

Output:

John F. Kennedy
x = 2
y = 0

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