song = sys.argv[1]
w = open(song)
for line in sorted(w, key = int(len(line)))
    print line

song = sys.argv[1]
w = open(song)
for line in sorted(w, key=len)
    print line

song = sys.argv[1]
w = open(song)
for line in sorted(w, key=lambda x: len(x.split()))
    print line

lines = [line.rstrip().split() for line in file]

lines = [sorted(line.rstrip().split(), key=len) for line in file]

lines = sorted((sorted(line.rstrip().split(), key=len) for line in file), key=len)

for line in lines:
    print ' '.join(line)

sentences.sort(key=word_count)

words = get_words(sentence)
words.sort(key=char_count)

#!/usr/bin/env python
import io
import sys

with io.open(sys.argv[1]) as file:
    sentences = file.read().splitlines()  # NOTE: line ends are not included
    result = sorted([sorted(get_words(s), key=char_count)
                     for s in sentences], key=word_count)

for words in result: # for each sentence
    print(' '.join(words))

get_words = unicode.split  # split on arbitrary whitespace
word_count = len           # number of items in the list of words
char_count = len           # unicode word length

import re

words = re.findall(r'w+', sentence, flags=re.UNICODE)

>>> len(u"ё")
2
>>> u"ё"
u'u0435u0308'

>>> print(u'U0001f602')
😂
>>> len(_)
1