Python: Remove None value from a given list

Last update on February 22 2025 10:55:34 (UTC/GMT +8 hours)

Remove None from List

Write a Python program to remove the None value from a given list.

Pictorial Presentation:

Sample Solution-1:

Python Code:

# Define a function called 'remove_none' that removes 'None' values from a list 'nums'.
def remove_none(nums):
    # Use a list comprehension to create a new list 'result' containing elements that are not 'None'.
    result = [x for x in nums if x is not None]
    return result

# Create a list 'nums' containing various values, including 'None' elements.
nums = [12, 0, None, 23, None, -55, 234, 89, None, 0, 6, -12]

# Print a message indicating the original list.
print("Original list:")
print(nums)

# Print a message indicating the intention to remove 'None' values from the list.
print("\nRemove None value from the said list:")

# Call the 'remove_none' function to remove 'None' values from the list 'nums' and print the result.
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]

Flowchart:

Sample Solution-2:

Python Code:

# Define a function called 'remove_none' that removes 'None' values from a list 'nums'.
def remove_none(nums):
    # Use the 'filter' function with 'None' as the filter function to remove 'None' values from the list.
    result = list(filter(None, nums))
    return result

# Create a list 'nums' containing various values, including 'None' elements.
nums = [12, 0, None, 23, None, -55, 234, 89, None, 0, 6, -12]

# Print a message indicating the original list.
print("Original list:")
print(nums)

# Print a message indicating the intention to remove 'None' values from the list.
print("\nRemove None value from the said list:")

# Call the 'remove_none' function to remove 'None' values from the list 'nums' and print the result.
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, 23, -55, 234, 89, 6, -12]

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to remove all occurrences of None and empty string values from a list.
• Write a Python program to recursively remove None values from a nested list structure.
• Write a Python program to remove None values from a list and replace them with the median of the non-None elements.
• Write a Python program to filter out None values from a list while preserving the original order and count the number of removed items.

Python Code Editor:

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