Python: Find all keys in the provided dictionary that have the given value

Last update on December 21 2024 07:28:43 (UTC/GMT +8 hours)

Write a Python program to find all keys in a dictionary that have the given value.

Sample Solution:

Python Code:

# Define a function 'test' that takes a dictionary 'dict' and a value 'val'.
def test(dict, val):
    # Use a list comprehension to find all keys in the dictionary where the corresponding value is equal to 'val'.
    return list(key for key, value in dict.items() if value == val)

# Create a dictionary 'students' where each key corresponds to a student's name, and the associated value is their age.
students = {
    'Theodore': 19,
    'Roxanne': 20,
    'Mathew': 21,
    'Betty': 20
}

# Print the original dictionary elements.
print("\nOriginal dictionary elements:")
print(students)

# Call the 'test' function to find all keys in the dictionary that have the specified value, which is 20 in this case.
print("\nFind all keys in the said dictionary that have the specified value:")
print(test(students, 20)) 

Sample Output:

Original dictionary elements:
{'Theodore': 19, 'Roxanne': 20, 'Mathew': 21, 'Betty': 20}

Find all keys in the said dictionary that have the specified value:
['Roxanne', 'Betty']

Flowchart:

Python Code Editor:

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