Python: Remove empty lists from a given list of lists

Last update on April 19 2025 12:58:40 (UTC/GMT +8 hours)

Remove Empty Lists from Nested List

Write a Python program to remove empty lists from a given list of lists.

Sample Solution:

Python Code:

# Create a list 'list1' that contains a mix of empty lists, strings, and sublists
list1 = [[], [], [], 'Red', 'Green', [1, 2], 'Blue', [], []]

# Print a message indicating the original list
print("Original list:")
# Print the contents of 'list1'
print(list1)

# Print a message indicating the operation to remove empty lists
print("\nAfter deleting the empty lists from the said lists of lists")

# Create a new list 'list2' containing non-empty elements from 'list1'
list2 = [x for x in list1 if x]

# Print 'list2', which contains non-empty elements
print(list2)

Sample Output:

Original list:
[[], [], [], 'Red', 'Green', [1, 2], 'Blue', [], []]

After deleting the empty lists from the said lists of lists
['Red', 'Green', [1, 2], 'Blue']

Flowchart:

For more Practice: Solve these Related Problems:

Write a Python program to remove empty sublists and replace them with a placeholder value.
Write a Python program to remove empty sublists only if they are consecutive in a given list.
Write a Python program to remove empty sublists from a nested list but retain at least one empty list if all are empty.
Write a Python program to remove empty sublists while preserving the original list’s indexing.

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