Python: Remove None value from a given list using lambda function

Last update on March 28 2025 12:59:07 (UTC/GMT +8 hours)

52. Remove None Values Lambda

Write a Python program to remove None values from a given list using the lambda function.

Sample Solution:

Python Code :

# Define a function 'remove_none' that filters out None values from a list
def remove_none(nums):
    # Use the 'filter' function with a lambda function to filter out elements that are not None
    # 'filter' returns an iterator, so convert it back to a list to get the result
    result = filter(lambda v: v is not None, nums)
    
    # Return the filtered list without the None values
    return list(result)

# Create a list 'nums' containing integers and some None values
nums = [12, 0, None, 23, None, -55, 234, 89, None, 0, 6, -12]

# Print the original list 'nums'
print("Original list:")
print(nums)

# Remove None values from the list using the 'remove_none' function and print the result
print("\nRemove None value from the said list:")
print(remove_none(nums)) 

Sample Output:

Original list:
[12, 0, None, 23, None, -55, 234, 89, None, 0, 6, -12]

Remove None value from the said list:
[12, 0, 23, -55, 234, 89, 0, 6, -12]

For more Practice: Solve these Related Problems:

• Write a Python program to remove all falsy values (None, 0, '', False) from a given list using lambda.
• Write a Python program to filter out None and empty string values from a list using lambda.
• Write a Python program to remove None values from a list and then sort the remaining elements using lambda.
• Write a Python program to remove None values from a list and replace them with a specified default value using lambda.

Python Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Write a Python program to find the maximum and minimum values in a given list of tuples using lambda function.