def main():
trie = WeightedTrie()
try:
while True:
print '[1]: Train algorithm'
print '[2] Auto-complete word'
selection = raw_input()
if selection == '1':
print 'Enter passage. Press `return` when done training.'
training_passage = raw_input()
trie.train(training_passage)
elif selection == '2':
print 'Enter auto-complete candidate.' \
' Press `return` when finished.'
fragment = raw_input()
results = trie.get_words(fragment)
if len(results):
print 'Possible words to complete `%s` ' \
'(in order of confidence) are: %s' % \
(fragment, ", ".join(results))
else:
print 'No previously seen words to complete `%s`' \
% fragment
else:
print 'Please select an option from the menu.'
except KeyboardInterrupt:
print 'Thanks for looking!'
def test_no_results(self):
passage = 'This is a passage about nothing. Some words will not be' \
'in this passage.'
trie = WeightedTrie()
trie.train(passage)
results = trie.get_words('xyz')
self.assertFalse(results, 'Expected no autocomplete results, but '
'was returned %s' % results)
def test_basic(self):
test_word = 'autocomplete'
trie = WeightedTrie()
passage = 'Hello this is a test of the autocomplete functionality'
trie.train(passage)
results = trie.get_words(test_word[:2])
self.assertTrue(test_word in results,
'Expected %s to be suggested in '
'autocomplete results' % test_word)
def test_weights(self):
trie = WeightedTrie()
passage = 'test test testing tester test testing test ' \
'testing tea team tear tee tent term terse'
trie.train(passage)
results = trie.get_words('te')
self.assertEqual('test', results[0],
'Expected `test` to be most likely, '
'but `%s` was returned as most likely' % results[0])
def test_punctuation(self):
passage = 'Hello, this is a test. Just a test? Yes just a test! ' \
'One, two, test, test. Tessa, Tesla, Testing, testers, tes'
trie = WeightedTrie()
trie.train(passage)
results = trie.get_words('tes')
for punc in string.punctuation:
for candidate in results:
self.assertFalse(punc in candidate,
'Expected no punctuation in '
'autocomplete results but found %s' % punc)
def test_case_insensitive(self):
test_word = 'tEsT'
trie = WeightedTrie()
passage = 'Test TEst TESt TEST TesTing Testers Testing Tested Tests'
trie.train(passage)
autocomplete_prefix = test_word[:2]
results = trie.get_words(autocomplete_prefix.lower())
self.assertFalse(autocomplete_prefix in results,
'Expected %s not to be in results' % test_word)
self.assertFalse(test_word in results,
'Expected %s not to be in results' % test_word)
self.assertTrue(test_word.lower() in results,
'Expected %s to be suggested in '
'autocomplete results' % test_word.lower())
def test_passage(self):
passage = 'The third thing that I need to tell you is that ' \
'this thing does not think thoroughly.'
trie = WeightedTrie()
trie.train(passage)
result1 = trie.get_words('thi')
self.assertEqual('thing', result1[0],
'Expected `thing` to be most likely autocomplete '
'candidate, but got %s' % result1[0])
expected_results1 = ['thing', 'think', 'third', 'this']
self.assertEqual(set(result1), set(expected_results1),
'Expected results did not match given results.')
result2 = trie.get_words('nee')
self.assertEqual('need', result2[0],
'Expected `need` to be most likely autocomplete '
'candidate, but got %s' % result2[0])
self.assertEqual(len(result2), 1,
'Expected 1 result, but got %s' % len(result2))
result3 = trie.get_words('th')
expected_results3 = ['that', 'thing', 'think', 'this',
'third', 'the', 'thoroughly']
self.assertEqual(set(result3), set(expected_results3),
'Expected results did not match given results.')
def test_invalid_input(self):
trie = WeightedTrie()
trie.train(None)
results = trie.get_words('word')
self.assertFalse(results, 'Expected no autocomplete results with no '
'data in the trie, but returned: '
'%s' % results)
trie.train('Sometimes a user will make a mistake and will '
'ask to auto get_words two words at once')
results = trie.get_words('two words')
self.assertFalse(results, 'Expected no autocomplete results when '
'requesting two words at once, but was '
'returned %s' % results)
results = trie.get_words('wil')
self.assertTrue(results, 'Expected autocomplete results when '
'requesting a prefix contained in the '
'passage, instead got no results.')