Как из списка удалить пустые списки?

ls = [[], [], ['1 ', 'en', ''], ['2 '], ['3 ', '', '100'], ['4 '], ['5 '], ['6 '], ['7 '], ['8 '],[]]

for i,d in enumerate(ls):
    if d==[]:
        del ls[i]

>>> ls = [[], [], ['1 ', 'en', ''], ['2 '], ['3 ', '', '100'], ['4 '], ['5 '], ['6 '], ['7 '], ['8 '], []]
>>> ls = list(filter(None, ls))
>>> ls
[['1 ', 'en', ''], ['2 '], ['3 ', '', '100'], ['4 '], ['5 '], ['6 '], ['7 '], ['8 ']]
>>>

ls = [x for x in ls if x]

h= filter(lambda x: x !='', b)

for w in b:
    for elem in w:
        if elem != '':
            b[b.index(w)][w.index(elem)]=elem            
        elif elem == '':
            w.pop(w.index(elem))
        else:
            w.remove(elem)

ls = [[], [], ['1 ', 'en', ''], ['2 '], ['3 ', '', '100'], ['4 '], ['5 '], ['6 '], ['7 '], ['8 '],[]]
 
ls2 = []
for i in range(len(ls)):
    ls2.append([])
    for el in ls[i]:
          if el != '': ls2[i].append(el)
ls = ls2
del ls2
print(ls)
# [[], [], ['1 ', 'en'], ['2 '], ['3 ', '100'], ['4 '], ['5 '], ['6 '], ['7 '], ['8 '], []]

def clear(l):
    for e in l:
        if isinstance(e, list):
            clear(e)
        if isinstance(e, str) and len(e) == 0:
            l.remove(e)
 
def main():
    a = [1, "", 2, ["3", "", "4", ["5", "", "6"], "7"], "8", "", "9"]
 
    clear(a)
 
    print(a)
 
 
if __name__ == "__main__":
    main()

import timeit
 
 
def test1():
    data = [[], [], ['1 ', 'en', ''], ['2 '], ['3 ', '', '100'], ['4 '],
            ['5 '],
            ['6 '], ['7 '], ['8 '], []]
 
    for i, sequence in enumerate(data):
        if all(sequence):
            continue
        for j, elem in enumerate(sequence):
            if not elem:
                del data[i][j]
 
 
def test2():
    ls = [[], [], ['1 ', 'en', ''], ['2 '], ['3 ', '', '100'], ['4 '], ['5 '],
          ['6 '], ['7 '], ['8 '], []]
 
    ls2 = []
    for i in range(len(ls)):
        ls2.append([])
        for el in ls[i]:
            if el != '': ls2[i].append(el)
    ls = ls2
    del ls2
 
 
def test3():
    def clear(l):
        for e in l:
            if isinstance(e, list):
                clear(e)
            if isinstance(e, str) and len(e) == 0:
                l.remove(e)
 
    data = [[], [], ['1 ', 'en', ''], ['2 '], ['3 ', '', '100'], ['4 '],
            ['5 '],
            ['6 '], ['7 '], ['8 '], []]
    clear(data)
 
print(timeit.timeit("test1()", setup="from __main__ import test1", number=100000))
print(timeit.timeit("test2()", setup="from __main__ import test2", number=100000))
print(timeit.timeit("test3()", setup="from __main__ import test3", number=100000))