class DocumentFrequenciesTests(unittest.TestCase):
def setUp(self):
self.model = DocumentFrequencies().load(source=paths.DOCFREQ)
def test_docs(self):
docs = self.model.docs
self.assertIsInstance(docs, int)
self.assertEqual(docs, 1000)
def test_get(self):
self.assertEqual(self.model["aaaaaaa"], 341)
with self.assertRaises(KeyError):
print(self.model["xaaaaaa"])
self.assertEqual(self.model.get("aaaaaaa", 0), 341)
self.assertEqual(self.model.get("xaaaaaa", 100500), 100500)
def test_tokens(self):
self.assertEqual(list(self.model._df), self.model.tokens())
def test_len(self):
# the remaining 18 are not unique - the model was generated badly
self.assertEqual(len(self.model), 982)
def test_iter(self):
aaa = False
for tok, freq in self.model:
if "aaaaaaa" in tok:
aaa = True
int(freq)
break
self.assertTrue(aaa)
def test_prune(self):
pruned = self.model.prune(4)
for tok, freq in pruned:
self.assertGreaterEqual(freq, 4)
self.assertEqual(len(pruned), 346)
def test_prune_self(self):
pruned = self.model.prune(1)
self.assertIs(self.model, pruned)
def test_greatest(self):
pruned = self.model.greatest(100)
freqs = [v for v in self.model._df.values()]
freqs.sort(reverse=True)
border = freqs[100]
for v in pruned._df.values():
self.assertGreaterEqual(v, border)
df1 = pruned._df
df2 = self.model.greatest(100)._df
self.assertEqual(df1, df2)
def test_write(self):
buffer = BytesIO()
self.model.save(buffer)
buffer.seek(0)
new_model = DocumentFrequencies().load(buffer)
self.assertEqual(self.model._df, new_model._df)
self.assertEqual(self.model.docs, new_model.docs)
class SimilarRepositories:
GITHUB_URL_RE = re.compile(
r"(https://|ssh://git@|git://)(github.com/[^/]+/[^/]+)(|.git|/)")
_log = logging.getLogger("SimilarRepositories")
def __init__(self,
id2vec=None,
df=None,
nbow=None,
prune_df_threshold=1,
wmd_cache_centroids=True,
wmd_kwargs: Dict[str, Any] = None,
languages: Tuple[List, bool] = (None, False),
engine_kwargs: Dict[str, Any] = None):
backend = create_backend()
if id2vec is None:
self._id2vec = Id2Vec().load(backend=backend)
else:
assert isinstance(id2vec, Id2Vec)
self._id2vec = id2vec
self._log.info("Loaded id2vec model: %s", self._id2vec)
if df is None:
if df is not False:
self._df = DocumentFrequencies().load(backend=backend)
else:
self._df = None
self._log.warning("Disabled document frequencies - you will "
"not be able to query custom repositories.")
else:
assert isinstance(df, DocumentFrequencies)
self._df = df
if self._df is not None:
self._df = self._df.prune(prune_df_threshold)
self._log.info("Loaded document frequencies: %s", self._df)
if nbow is None:
self._bow = BOW().load(backend=backend)
else:
assert isinstance(nbow, BOW)
self._bow = nbow
self._log.info("Loaded BOW model: %s", self._bow)
assert self._bow.get_dep("id2vec")["uuid"] == self._id2vec.meta["uuid"]
if len(self._id2vec) != self._bow.matrix.shape[1]:
raise ValueError(
"Models do not match: id2vec has %s tokens while nbow has %s" %
(len(self._id2vec), self._bow.matrix.shape[1]))
self._log.info("Creating the WMD engine...")
self._wmd = WMD(self._id2vec.embeddings, self._bow, **(wmd_kwargs
or {}))
if wmd_cache_centroids:
self._wmd.cache_centroids()
self._languages = languages
self._engine_kwargs = engine_kwargs
def query(self, url_or_path_or_name: str,
**kwargs) -> List[Tuple[str, float]]:
try:
repo_index = self._bow.documents.index(url_or_path_or_name)
except ValueError:
repo_index = -1
if repo_index == -1:
match = self.GITHUB_URL_RE.match(url_or_path_or_name)
if match is not None:
name = match.group(2)
try:
repo_index = self._bow.documents.index(name)
except ValueError:
pass
if repo_index >= 0:
neighbours = self._query_domestic(repo_index, **kwargs)
else:
neighbours = self._query_foreign(url_or_path_or_name, **kwargs)
neighbours = [(self._bow[n[0]][0], n[1]) for n in neighbours]
return neighbours
def _query_domestic(self, repo_index, **kwargs):
return self._wmd.nearest_neighbors(repo_index, **kwargs)
def _query_foreign(self, url_or_path: str, **kwargs):
df = self._df
if df is None:
raise ValueError("Cannot query custom repositories if the "
"document frequencies are disabled.")
with tempfile.TemporaryDirectory(prefix="vecino-") as tempdir:
target = os.path.join(tempdir, "repo")
if os.path.isdir(url_or_path):
url_or_path = os.path.abspath(url_or_path)
os.symlink(url_or_path, target, target_is_directory=True)
repo_format = "standard"
else:
self._log.info("Cloning %s to %s", url_or_path, target)
porcelain.clone(url_or_path,
target,
bare=True,
outstream=sys.stderr)
repo_format = "bare"
bow = repo2bow(tempdir,
repo_format,
1,
df,
*self._languages,
engine_kwargs=self._engine_kwargs)
ibow = {}
for key, val in bow.items():
try:
ibow[self._id2vec[key]] = val
except KeyError:
continue
words, weights = zip(*sorted(ibow.items()))
return self._wmd.nearest_neighbors((words, weights), **kwargs)
