Remove all nan from nested list

I’m attempting to remove all nan list items from a nested list

l1= 
[['a', 'b', 'c', 'd', 'e', 'f'],
 [1.0, 2.0, 3.0, 4.0, 5.0, nan],
 ['red', 'orange', 'blue', nan, nan, nan]]

I’ve tried the following

cleanedList = [x for x in l1 if str(x) != 'nan']

However, this returns the same output

>Solution :

nan is not equal to itself (this goes for float('nan') as well as np.nan). So, we can use filter(), removing elements which are not equal to itself.

l1 = [['a', 'b', 'c', 'd', 'e', 'f'], 
      [1.0, 2.0, 3.0, 4.0, 5.0, nan], 
      ['red', 'orange', 'blue', nan, nan, nan]]

result = [list(filter(lambda x: x == x, inner_list)) for inner_list in l1]

print(result)