This Python code filters a dictionary to extract key-value pairs...

This Python code filters a dictionary to extract key-value pairs where at least one element in the list (values of the dictionary) exists in a specified "required" list (missing_list).

Here’s a step-by-step breakdown:

Input

1. Dictionary (test_dict):

   {'gfg': [4, 6], 'is': [10], 'best': [9, 5, 7]}
   

   Each key has a list of integers as its associated value.

2. List (missing_list):

   [4, 6, 10]
   

   This is the list of elements we want to search for in the dictionary values.

Code Explanation

1. Original Dictionary: The original dictionary test_dict is printed.

2. Dictionary Comprehension:

   res = {key: val for key, val in test_dict.items() if any(vals in missing_list for vals in val)}
   

   • For each key, val pair in test_dict.items(), the code checks if any value (vals) in the list val exists in missing_list (using the any() function).
   • If the condition is True, that key-value pair is included in the new dictionary res.

3. Result: The resulting dictionary res is printed.

Output

For the given inputs:

• missing_list: [4, 6, 10]
• test_dict: {'gfg': [4, 6], 'is': [10], 'best': [9, 5, 7]}

The process works as follows:

• Key 'gfg': [4, 6] has elements (4, 6) in missing_list. ✅ Included.
• Key 'is': [10] has element (10) in missing_list. ✅ Included.
• Key 'best': [9, 5, 7] has no elements in missing_list. ❌ Excluded.

Result:

{'gfg': [4, 6], 'is': [10]}

Final Output:

The original dictionary : {'gfg': [4, 6], 'is': [10], 'best': [9, 5, 7]}
The extracted dictionary: {'gfg': [4, 6], 'is': [10]}