Modify Example E4.8 to use a defaultdict to produce a list of words, keyed by their length from the text of the first line of the Gettysburg Address.
Here is a possible solution:
from collections import defaultdict
text = "Four score and seven years ago our fathers brought forth on this"\
"continent, a new nation, conceived in Liberty, and dedicated to the"\
"proposition that all men are created equal"
text = text.replace(',', '').lower() # remove punctuation
word_lengths = defaultdict(int)
for word in text.split():
word_lengths[word] += 1
for word, count in word_lengths.items():
print('{}: {}'.format(word, count))
Output:
four: 1
score: 1
and: 2
seven: 1
years: 1
...