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chooper/group_by_letter.py

Created June 28, 2011 04:45
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Group words by their first letter
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group_by_letter.py
#!/usr/bin/env python
"""Group words by their first letter"""
from collections import defaultdict
def group_by_letter(words):
buckets = defaultdict(lambda:[])
for word in words:
buckets[word[0].lower()].append(word)
return buckets
if __name__ == '__main__':
print group_by_letter(['narragansett','brooklyn lager','magic hat','dog fish head','shock top','ten penny','bass'])
# Output: defaultdict(<function <lambda> at 0x7fc83416b2a8>, {'b': ['bass', 'brooklyn lager'], 'd': ['dog fish head'], 'm': ['magic hat'], 'n':['narragansett'], 's': ['shock top'], 't': ['ten penny']})
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