Zadatak

import os, math

fileList = {}
for root, dirs, files in os.walk("."):
    for file in files:
        filename, file_ext = os.path.splitext(file)
        if len(file_ext) > 0:
            if file_ext in fileList:
                fileList[file_ext]['count'] += 1
                fileList[file_ext]['size'] += os.path.getsize(root + os.sep + file)
            else:
                fileList[file_ext] = {'count': 1, 'size': os.path.getsize(root + os.sep + file)}

for ext, file in fileList.iteritems():
    kbSize = math.ceil(file['size'] / 1024)
    args = [file['count'], str(int(kbSize)) + 'kb', ext]
    print '{0:<10} {1:>8} {2:>8}'.format(*args)