A short Python script to print out anagrams.

anagrams.py

#!/usr/bin/env python3
""" anagrams.py

    Usage:
        ./anagrams.py myword

    Prints out a list of anagrams of myword.

    This uses the file /usr/share/dict/words to get a dictionary.
"""


# ______________________________________________________________________
# Imports

import sys
from collections import defaultdict


# ______________________________________________________________________
# Functions

def load_wordmap():
    """ Load all words and map their sorted string to a list of all the words
        that sort to that key. Eg 'aemt' -> ['meat', 'team', ...].
    """

    with open('/usr/share/dict/words') as f:
        wordlist = [line.strip() for line in f if len(line.strip()) > 0]

    # Add approximate plurals.
    plurals = [x + 's' if not x.endswith('s') else x + 'es' for x in wordlist]
    wordlist += plurals

    wordmap = defaultdict(list)
    for word in wordlist:
        wordmap[''.join(sorted(word))].append(word)

    return wordmap

def print_anagrams(wordmap, word):
    """ Using `wordmap`, print all the anagrams of `word`. """
    for other_word in wordmap[''.join(sorted(word))]:
        print(other_word)


# ______________________________________________________________________
# Main

if __name__ == '__main__':

    if len(sys.argv) == 1:
        print(__doc__)
        sys.exit(0)

    wordmap = load_wordmap()
    print_anagrams(wordmap, sys.argv[1])