Python: Create a flat list of all the keys in a flat dictionary

Last update on June 28 2025 12:39:55 (UTC/GMT +8 hours)

78. Create Flat List of All Keys in a Dictionary

Write a Python program to create a flat list of all the keys in a flat dictionary.

Use dict.keys() to return the keys in the given dictionary.
Return a list() of the previous result.

Sample Solution:

Python Code:

# Define a function 'test' that takes a dictionary 'flat_dict'.
# The function returns a list of keys from the given dictionary.
def test(flat_dict):
    # Use the 'keys' method to extract all the keys from the dictionary and convert them to a list.
    return list(flat_dict.keys())

# Create a dictionary 'students' with key-value pairs.
students = {
    'Theodore': 19,
    'Roxanne': 20,
    'Mathew': 21,
    'Betty': 20
}

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

# Call the 'test' function to create a flat list of all the keys in the 'students' dictionary.
print("\nCreate a flat list of all the keys of the said flat dictionary:")
print(test(students))

Sample Output:

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

Create a flat list of all the keys of the said flat dictionary:
['Theodore', 'Roxanne', 'Mathew', 'Betty']

Flowchart:

Flowchart: Create a flat list of all the keys in a flat dictionary.

For more Practice: Solve these Related Problems:

Write a Python program to extract all keys from a flat dictionary and store them in a list using the keys() method.
Write a Python program to iterate over a dictionary and build a list of keys manually.
Write a Python program to use list comprehension to create a list of all dictionary keys.
Write a Python program to implement a function that returns a sorted list of keys from a dictionary.

Go to:

Previous: Write a Python program to convert given a dictionary to a list of tuples.
Next: Write a Python program to create a flat list of all the values in a flat dictionary.

Python Code Editor: