Python: How to remove empty lists from a list?

Python: How to remove empty lists from a list?

You can remove empty lists from a list in Python using various methods. Here are a few approaches:

  • Using List Comprehension: You can use a list comprehension to filter out empty lists from a list.
my_list = [1, [], 3, [], [], 6, []] filtered_list = [x for x in my_list if x] print(filtered_list)

This will output:

[1, 3, 6]
  • Using the filter function: You can also use the filter function along with None as the filtering function to remove empty lists.
my_list = [1, [], 3, [], [], 6, []] filtered_list = list(filter(None, my_list)) print(filtered_list)

The output will be the same as in the previous example:

[1, 3, 6]
  • Using a for loop: You can iterate through the list and append non-empty lists to a new list.
my_list = [1, [], 3, [], [], 6, []] filtered_list = [] for item in my_list: if item: filtered_list.append(item) print(filtered_list)

Again, this will produce the same output:

[1, 3, 6]

Any of these methods will remove empty lists from your list and give you a filtered list containing only non-empty elements.

Examples

  1. "Python remove empty lists from list of lists"

    • Description: Users may want to remove empty lists from a list of lists in Python to clean up data structures.
    • Code:
      non_empty_lists = [lst for lst in list_of_lists if lst]

  2. "Python filter out empty lists from list"

    • Description: Users might search for ways to filter out empty lists from a list of mixed elements in Python.
    • Code:
      non_empty_lists = list(filter(None, list_of_lists))

  3. "Python delete empty lists from list"

    • Description: This query targets users seeking methods to delete empty lists from a list in Python.
    • Code:
      list_of_lists = [lst for lst in list_of_lists if lst]

  4. "Python remove empty sublists from list"

    • Description: Users may look for ways to remove empty sublists from a list of lists in Python.
    • Code:
      non_empty_sublists = [sublist for sublist in list_of_lists if any(sublist)]

  5. "Python eliminate empty lists from list"

    • Description: Users might seek methods to eliminate empty lists from a list containing various elements in Python.
    • Code:
      non_empty_lists = [lst for lst in list_of_lists if len(lst) > 0]

  6. "Python clean list from empty lists"

    • Description: This query focuses on cleaning up a list by removing any empty lists it contains in Python.
    • Code:
      list_of_lists = [lst for lst in list_of_lists if lst]

  7. "Python remove empty lists from nested list"

    • Description: Users may want to remove empty lists from a nested list structure in Python.
    • Code:
      non_empty_lists = [lst for lst in list_of_lists if any(lst)]

  8. "Python clean up list by removing empty lists"

    • Description: This query targets users looking to clean up a list by removing any empty lists it contains in Python.
    • Code:
      non_empty_lists = [lst for lst in list_of_lists if lst]

  9. "Python purge empty lists from list"

    • Description: Users may search for ways to purge or eliminate empty lists from a list in Python.
    • Code:
      non_empty_lists = [lst for lst in list_of_lists if lst]

  10. "Python trim empty lists from list"

    • Description: Users may inquire about methods to trim or remove empty lists from a list in Python.
    • Code:
      list_of_lists = [lst for lst in list_of_lists if lst]

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