How to convert a string into list of strings

[Jimmy45]

Hello,
I am trying to convert a string into list of strings.
The output is like the following:
[['a', 'a'], ['b'], ['c']].

However, the output must be like:
['a', 'a', 'b', 'c']

My code is like the following:

return_letter = ""
letter_list = []
f = open(file_name,"r")
for line in f:
        k = line[:1]
        letter_list.append(k.split()*int(line[1:]))
print letter_list  

The file which is being read looks like this:
a2
b1
c1

Thank you in advance.

[bvdet]

Please use code tags when posting code. See posting guidelines here.

Try this:

        for i in range(int(line[1:])
            letter_list.append(line[:1])

BV - Moderator

[Jimmy45]

@bvdet
Thank you very much :))) It's working!!!!!!!