Program for Dictionary get() Function

Python Program for Dictionary get() Function

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Dictionary in python :

A dictionary is a set of elements that have key-value pairs. The values in the elements are accessed using the element’s keys.

Examples:

Example1:

Input:

Given dictionary = {100: 'hello', 200: 'this', 300: 'is', 400: 'btechgeeks'}

Output:

The above given dictionary is :
{100: 'hello', 200: 'this', 300: 'is', 400: 'btechgeeks'}
The respective value at the given key 200 :   this
The respective value at the given key 400 :   btechgeeks
The respective value at the given key 500:   None

Example2:

Input:

Given dictionary = {'good': '5', 'morning': '10', 'btechgeeks': '15'}

Output:

The above given dictionary is :
{'good': '5', 'morning': '10', 'btechgeeks': '15'}
The respective value at the given key btechgeeks = 15
The respective value at the given key hello = None

Program for Dictionary get() Function in Python

 get() method in Dictionary:

The get() method of the Python dictionary returns a value for the given key. If the key is not available, the default value None is returned.

Syntax:

dict.get(key, default = None)

Parameters:

Key: This is the Key that will be looked up in the dictionary.

default: If the key does not exist, this is the value that will be returned.

Return Value:

This method returns the value for the specified key. If the key is not available, the default value None is returned.

Method #1: Using Built-in Functions (Static Input)

Approach:

  • Give the dictionary by initializing it with some random values and store it in a variable.
  • Print the above-given dictionary.
  • Apply the get() method to the given dictionary to get the respective value for the given key.
  • Store it in another variable.
  • Similarly, do the same for the other keys to get the respective value for the given key.
  • The Exit of the Program.

Below is the implementation:

# Give the dictionary by initializing it with some random values and store it
# in a variable.
gvn_dictinry = {100: 'hello', 200: 'this', 300: 'is', 400: 'btechgeeks'}
# Print the above-given dictionary.
print("The above given dictionary is :")
print(gvn_dictinry)
# Apply get() method to the given dictionary to get the respective value
# for the given key.
# Store it in another variable.
rslt = gvn_dictinry.get(200)
# Similarly, do the same for the other keys to get the respective value for the given key.
print("The respective value at the given key 200 :  ", rslt)
rslt_1 = gvn_dictinry.get(400)
print("The respective value at the given key 400 :  ", rslt_1)
rslt_2 = gvn_dictinry.get(500)
print("The respective value at the given key 500:  ", rslt_2)

Output:

The above given dictionary is :
{100: 'hello', 200: 'this', 300: 'is', 400: 'btechgeeks'}
The respective value at the given key 200 :   this
The respective value at the given key 400 :   btechgeeks
The respective value at the given key 500:   None

Method #2: Using Built-in Functions (User Input)

Approach:

  • Take a dictionary and initialize it with an empty dictionary using dict() or {}.
  • Give the number of keys as user input using int(input()) and store it in a variable.
  • Loop till the given number of keys using for loop.
  • Inside the for loop scan the key and value as user input using input(), split() functions, and store them in two separate variables.
  • Initialize the key with the value of the dictionary.
  • Print the above-given dictionary.
  • Give the key as user input using the input() function to get the respective value for the given key.
  • Store it in another variable.
  • Apply the get() method to the given dictionary to get the respective value for the above-given key.
  • Store it in another variable.
  • Similarly, do the same for the other keys to get the respective value for the given key.
  • The Exit of the Program.

Below is the implementation:

# Take a dictionary and initialize it with an empty dictionary using dict() or {}.
gvn_dictinry = {}
# Give the number of keys as user input using int(input()) and store it in a variable.
numb_of_kys = int(
    input('Enter some random number of keys of the dictionary = '))
# Loop till the given number of keys using for loop.
for p in range(numb_of_kys):
        # Inside the for loop scan the key and value as
    # user input using input(),split() functions
    # and store them in two separate variables.
    keyy, valuee =  input(
        'Enter key and value separated by spaces = ').split()
    # Initialize the key with the value of the dictionary.
    gvn_dictinry[keyy] = valuee

# Print the above-given dictionary.
print("The above given dictionary is :")
print(gvn_dictinry)
# Give the key as user input using the input() function to get the respective value
# for the given key.
# Store it in another variable.
gvn_key= input("Enter some random key = ")
# Apply the get() method to the given dictionary to get the respective value for the above-given key.
p = gvn_dictinry.get(gvn_key)
# Store it in another variable.
print("The respective value at the given key ",gvn_key," = ", p )
# Similarly, do the same for the other keys to get the respective value for the given key.
gvn_key2= input("Enter some random key = ")
q = gvn_dictinry.get(gvn_key2)
print("The respective value at the given key ",gvn_key2," = ", q)

Output:

Enter some random number of keys of the dictionary = 3
Enter key and value separated by spaces = good 5
Enter key and value separated by spaces = morning 10
Enter key and value separated by spaces = btechgeeks 15
The above given dictionary is :
{'good': '5', 'morning': '10', 'btechgeeks': '15'}
Enter some random key = btechgeeks
The respective value at the given key btechgeeks = 15
Enter some random key = hello
The respective value at the given key hello = None