Delete strings from a list to create a new only number list

[Dvdscot]

Hello,

I am doing a Python training course and am stuck at this question:

Got a list:
Char_List = ['Bla', 'Blu', 10, 20, 30, 40]

Want to have this result:
Num_List = [10, 20, 30, 40]

Used this code:

Num_List = []
for entry in range(len(Char_List)):
    if type(entry) != str:
        Num_List.append(entry)
print(Num_List)

But I get [0, 1, 2, 3, 4, 5], the indexes of the complete Char_List is shown instead of the numeric content. Thanks.