Extract Key's Value from List and Dictionary in Python

When it is required to extract the value of key if the key is present in the list as well as the dictionary, a simple iteration and the ‘all’ operator are used.

Example

Below is a demonstration of the same −

my_list = ["Python", "is", "fun", "to", "learn", "and", "teach", 'cool', 'object', 'oriented']

my_dictionary = {"Python" : 2, "fun" : 4, "learn" : 6}

K = "Python"
print("The value of K is ")
print(K)

print("The list is : " )
print(my_list)

print("The dictionary is : " )
print(my_dictionary)

my_result = None
if all(K in sub for sub in [my_dictionary, my_list]):
   my_result = my_dictionary[K]

print("The result is : ")
print(my_result)

Output

The value of K is
Python
The list is :
['Python', 'is', 'fun', 'to', 'learn', 'and', 'teach']
The dictionary is :
{'Python': 2, 'fun': 4, 'learn': 6}
The result is :
2

Explanation

• A list of strings is defined and is displayed on the console.

• A dictionary of values is defined and displayed on the console.

• The value of K is defined and is displayed on the console.

• A value is set to None.

• The ‘all’ operator is used along with a simple iteration to check if the values present in the dictionary are present in the list.

• If yes, the value will be assigned the ‘K’th element from the dictionary.

• This value is displayed as the output on the console.