Directory Listing with size (no sub folders) via Python 07

PS E:\> python getDirSize02.py
running on dir "."
Traceback (most recent call last):
  File "getDirSize02.py", line 31, in <module>
    listContents();
  File "getDirSize02.py", line 23, in listContents
    f.write(c.encode('utf8'))
TypeError: write() argument must be str, not bytes
PS E:\>