def get_tokenized_data(training_path, tokenizer_conf, shuffle_targets=False,
test_data='', *args, **kwargs):
"""
Loads data from either XML or compressed JSON
:param gzip_json: set to True of False to force this method to read XML/JSON. Otherwise the type of
input data is determined by the presence or absence of a .gz extension on the training_path
:param args:
"""
if is_gzipped(training_path):
tokenizer = GzippedJsonTokenizer(**tokenizer_conf)
x_tr, y_tr = tokenizer.tokenize_corpus(training_path)
if test_data:
x_test, y_test = tokenizer.tokenize_corpus(test_data)
else:
x_test, y_test = None, None
return x_tr, np.array(y_tr), x_test, np.array(y_test) if y_test else y_test
# todo maybe we want to keep the XML code. In that case check if the file is XML or CoNLL
# m011303:sample-data mmb28$ file aclImdb-tagged/neg/train_neg_12490_1.txt.tagged
# aclImdb-tagged/neg/train_neg_12490_1.txt.tagged: XML document text
elif _check_file_magic(training_path, b'directory'):
# need to find out if these are XML or CoNLL files
a_file = glob(os.path.join(training_path, '*', '*'))[0]
if _check_file_magic(a_file, b'XML'):
tokenizer = XmlTokenizer(**tokenizer_conf)
else:
# must be ConLL then
tokenizer = ConllTokenizer(**tokenizer_conf)
raw_data, data_ids = load_text_data_into_memory(training_path=training_path,
test_path=test_data,
shuffle_targets=shuffle_targets)
return tokenize_data(raw_data, tokenizer, data_ids)
else:
raise ValueError('Input is neither a gzipped file containing all data nor a directory')
def __iter__(self):
for fname in self.files:
filename = join(self.dirname, fname)
infile = gzip.open(filename) if is_gzipped(filename) else open(filename)
with contextlib.closing(infile):
for line in infile:
# yield gensim.utils.tokenize(line, lower=True)
if isinstance(line, bytes):
line = line.decode()
res = [DocumentFeature.smart_lower(w) for w in line.split() if
DocumentFeature.from_string(w).type != 'EMPTY']
if len(res) > 8:
# ignore short sentences, they are probably noise
if self.remove_pos:
yield [x.split('/')[0] for x in res]
else:
yield res
def from_tsv(cls, tsv_file, sim_threshold=0, include_self=False,
lowercasing=False, ngram_separator='_', pos_separator='/', allow_lexical_overlap=True,
row_filter=lambda x, y: True, column_filter=lambda x: True, max_len=50,
max_neighbours=1e8, merge_duplicates=False, immutable=True,
enforce_word_entry_pos_format=True, **kwargs):
"""
Create a Thesaurus by parsing a Byblo-compatible TSV files (events or sims).
If duplicate values are encoutered during parsing, only the latest will be kept.
:param tsv_file: path to input TSV file. May be gzipped.
:type tsv_file: str
:param sim_threshold: min similarity between an entry and its neighbour for the neighbour to be included
:type sim_threshold: float
:param include_self: whether to include self as nearest neighbour.
:type include_self: bool
:param lowercasing: if true, most of what is read will be lowercased (excluding PoS tags), so
Cat/N -> cat/N. This is desirable when reading thesauri with this class. If False, no lowercasing
will take place. This might be desirable when readings feature lists or already lowercased neighbour
lists. FET + Byblo thesauri are already lowercased.
:type lowercasing: bool
:param ngram_separator: When n_gram entries are read in, what are the indidivual tokens separated by
:param column_filter: A function that takes a string (column in the file) and returns whether or not
the string should be kept
:param row_filter: takes a string and its corresponding DocumentFeature and determines if it should be loaded.
If `enforce_word_entry_pos_format` is `False`, the second parameter to this function will be `None`
:param allow_lexical_overlap: whether neighbours/features are allowed to overlap lexically with the entry
they are neighbours/features of. OTE: THE BEHAVIOUR OF THIS PARAMETER IS SLIGHTLY DIFFERENT FROM THE EQUIVALENT
IN VECTORS. SEE COMMENT THERE.
:param max_len: maximum length (in characters) of permissible **entries**. Longer entries are ignored.
:param max_neighbours: maximum neighbours per entry. This is applied AFTER the filtering defined by
column_filter and allow_lexical_overlap is finished.
:param merge_duplicates: whether to raise en error if multiple entries exist, or concatenate/add them together.
The former is appropriate for `Thesaurus`, and the latter for `Vectors`
:param enforce_word_entry_pos_format: if true, entries that are not in a `word/POS` format are skipped. This
must be true for `allow_lexical_overlap` to work.
"""
if not tsv_file:
raise ValueError("No thesaurus specified")
DocumentFeature.recompile_pattern(pos_separator=pos_separator, ngram_separator=ngram_separator)
to_return = dict()
logging.info('Loading thesaurus %s from disk', tsv_file)
if not allow_lexical_overlap:
logging.warning('DISALLOWING LEXICAL OVERLAP')
if not allow_lexical_overlap and not enforce_word_entry_pos_format:
raise ValueError('allow_lexical_overlap requires entries to be converted to a DocumentFeature. '
'Please enable enforce_word_entry_pos_format')
FILTERED = '___FILTERED___'.lower()
gzipped = is_gzipped(tsv_file)
if gzipped:
logging.info('Attempting to read a gzipped file')
fhandle = gzip.open(tsv_file)
else:
fhandle = open(tsv_file)
with fhandle as infile:
for line in infile.readlines():
if gzipped:
# this is a byte steam, needs to be decoded
tokens = line.decode('UTF8').strip().split('\t')
else:
tokens = line.strip().split('\t')
if len(tokens) % 2 == 0:
# must have an odd number of things, one for the entry
# and pairs for (neighbour, similarity)
logging.warning('Skipping dodgy line in thesaurus file: %s\n %s', tsv_file, line)
continue
if tokens[0] != FILTERED:
key = DocumentFeature.smart_lower(tokens[0], lowercasing)
dfkey = DocumentFeature.from_string(key) if enforce_word_entry_pos_format else None
if enforce_word_entry_pos_format and dfkey.type == 'EMPTY':
# do not load things in the wrong format, they'll get in the way later
# logging.warning('%s is not in the word/POS format, skipping', tokens[0])
continue
if (not row_filter(key, dfkey)) or len(key) > max_len:
logging.debug('Skipping entry for %s', key)
continue
to_insert = [(DocumentFeature.smart_lower(word, lowercasing), float(sim))
for (word, sim) in walk_nonoverlapping_pairs(tokens, 1)
if word.lower() != FILTERED and column_filter(word) and float(sim) > sim_threshold]
if not allow_lexical_overlap:
to_insert = cls.remove_overlapping_neighbours(dfkey, to_insert)
if len(to_insert) > max_neighbours:
to_insert = to_insert[:max_neighbours]
if include_self:
to_insert.insert(0, (key, 1.0))
# the steps above may filter out all neighbours of an entry. if this happens,
# do not bother adding it
if len(to_insert) > 0:
if key in to_return: # this is a duplicate entry, merge it or raise an error
if merge_duplicates:
logging.debug('Multiple entries for "%s" found. Merging.', tokens[0])
c = Counter(dict(to_return[key]))
c.update(dict(to_insert))
to_return[key] = [(k, v) for k, v in c.items()]
else:
raise ValueError('Multiple entries for "%s" found.' % tokens[0])
else:
to_return[key] = to_insert
else:
logging.warning('Nothing survived filtering for %r', key)
return Thesaurus(to_return, immutable=immutable)
