def __init__(self, data_filename, docs_mask_dict, pick_method='sum', ngram_range=(1, 3), text_header='abstract',
cached_folder_name=None, max_df=0.1, user_ngrams=None, prefilter_terms=0,
terms_threshold=None, output_name=None, calculate_timeseries=None, m_steps_ahead=5,
emergence_index='porter', exponential=False, nterms=50, patents_per_quarter_threshold=20, sma=None):
self.__emergence_index = emergence_index
# load data
self.__data_filename = data_filename
self.__date_dict = docs_mask_dict['date']
self.__timeseries_date_dict = docs_mask_dict['timeseries_date']
self.__timeseries_data = []
self.__emergence_list = []
self.__pick_method = pick_method
# calculate or fetch tf-idf mat
if cached_folder_name is None:
dataframe = data_factory.get(data_filename)
utils.checkdf(dataframe, calculate_timeseries, docs_mask_dict, text_header)
utils.remove_empty_documents(dataframe, text_header)
self.__tfidf_obj = tfidf_from_text(text_series=dataframe[text_header],
ngram_range=ngram_range,
max_document_frequency=max_df,
tokenizer=LemmaTokenizer())
tfidf_mask_obj = TfidfMask(self.__tfidf_obj, ngram_range=ngram_range, uni_factor=0.8, unbias=True)
self.__tfidf_obj.apply_weights(tfidf_mask_obj.tfidf_mask)
if prefilter_terms != 0:
tfidf_reduce_obj = TfidfReduce(self.__tfidf_obj.tfidf_matrix, self.__tfidf_obj.feature_names)
term_score_tuples = tfidf_reduce_obj.extract_ngrams_from_docset(pick_method)
num_tuples_to_retain = min(prefilter_terms, len(term_score_tuples))
feature_subset = sorted([x[1] for x in term_score_tuples[:num_tuples_to_retain]])
number_of_ngrams_before = len(self.__tfidf_obj.feature_names)
self.__tfidf_obj = tfidf_subset_from_features(self.__tfidf_obj, feature_subset)
number_of_ngrams_after = len(self.__tfidf_obj.feature_names)
print(f'Reduced number of terms by pre-filtering from {number_of_ngrams_before:,} '
f'to {number_of_ngrams_after:,}')
self.__cpc_dict = utils.cpc_dict(dataframe)
if docs_mask_dict['date_header'] is None:
self.__cached_folder_name = path.join('cached', output_name + f'-mdf-{max_df}')
self.__dates = None
else:
self.__dates = scripts.utils.date_utils.generate_year_week_dates(dataframe,
docs_mask_dict['date_header'])
min_date = min(self.__dates)
max_date = max(self.__dates)
self.__cached_folder_name = path.join('cached', output_name + f'-mdf-{max_df}-{min_date}-{max_date}')
utils.pickle_object('tfidf', self.__tfidf_obj, self.__cached_folder_name)
utils.pickle_object('dates', self.__dates, self.__cached_folder_name)
utils.pickle_object('cpc_dict', self.__cpc_dict, self.__cached_folder_name)
else:
print(f'Reading document and TFIDF from pickle {cached_folder_name}')
self.__cached_folder_name = path.join('cached', cached_folder_name)
self.__tfidf_obj = utils.unpickle_object('tfidf', self.__cached_folder_name)
self.__dates = utils.unpickle_object('dates', self.__cached_folder_name)
self.__cpc_dict = utils.unpickle_object('cpc_dict', self.__cached_folder_name)
if self.__dates is not None:
min_date = min(self.__dates)
max_date = max(self.__dates)
print(f'Document year-week dates range from {min_date // 100}-{(min_date % 100):02d} '
f'to {max_date // 100}-{(max_date % 100):02d}')
WordAnalyzer.init(
tokenizer=LemmaTokenizer(),
preprocess=lowercase_strip_accents_and_ownership,
ngram_range=ngram_range)
# todo: pipeline is now a one-way trip of data, slowly collapsing / shrinking it as we don't need to keep
# the original. We're really just filtering down.
# todo: build up a list of functions to apply as document filters. all filters to have common args (c/o
# partialfunc if required) so we can then call them in sequence...
# from a combiner.
# each func just returns an array of bool (or 0/1)
# if union - create union combiner, else create intersection combiner. combiner = union if... else intersection
# weights = combiner(list of funcs, data set)
# combiner: if list is empty, return [1] * size; if single entry, return its array
# union: if more entries after single, add / or
# intersection: if more entries after single, multiple / and
# then apply mask to tfidf object and df (i.e. remove rows with false or 0); do this in place
print(f'Applying documents filter...')
# docs weights( column, dates subset + time, citations etc.)
doc_filters = DocumentsFilter(self.__dates, docs_mask_dict, self.__cpc_dict,
self.__tfidf_obj.tfidf_matrix.shape[0]).doc_filters
# todo: build up list of weight functions (left with single remaining arg etc via partialfunc)
# combine(list, tfidf) => multiplies weights together, then multiplies across tfidf (if empty, no side effect)
# todo: this is another weight function...
# term weights - embeddings
print(f'Applying terms filter...')
filter_terms_obj = FilterTerms(self.__tfidf_obj.feature_names, user_ngrams, threshold=terms_threshold)
term_weights = filter_terms_obj.ngram_weights_vec
# todo: replace tfidf_mask with isolated functions: clean_unigrams, unbias_ngrams;
# these operate directly on tfidf
# Hence return nothing - operate in place on tfidf.
print(f'Creating a masked tfidf matrix from filters...')
# tfidf mask ( doc_ids, doc_weights, embeddings_filter will all merge to a single mask in the future)
tfidf_mask_obj = TfidfMask(self.__tfidf_obj, ngram_range=ngram_range, uni_factor=0.8)
tfidf_mask_obj.update_mask(doc_filters, term_weights)
tfidf_mask = tfidf_mask_obj.tfidf_mask
# todo: this mutiply and remove null will disappear - maybe put weight combiner last so it can remove 0 weights
# mask the tfidf matrix
tfidf_masked = tfidf_mask.multiply(self.__tfidf_obj.tfidf_matrix)
tfidf_masked, self.__dates = utils.remove_all_null_rows_global(tfidf_masked, self.__dates)
print(f'Processing TFIDF matrix of {tfidf_masked.shape[0]:,}'
f' / {self.__tfidf_obj.tfidf_matrix.shape[0]:,} documents')
# todo: no advantage in classes - just create term_count and extract_ngrams as functions
self.__tfidf_reduce_obj = TfidfReduce(tfidf_masked, self.__tfidf_obj.feature_names)
self.__timeseries_data = None
# if other outputs
self.__term_score_tuples = self.__tfidf_reduce_obj.extract_ngrams_from_docset(pick_method)
self.__term_score_tuples = utils.stop_tup(self.__term_score_tuples, WordAnalyzer.stemmed_stop_word_set_uni,
WordAnalyzer.stemmed_stop_word_set_n)
# todo: no output method; just if statements to call output functions...?
# Only supply what they each directly require
# todo: hence Pipeline then becomes a single function
if not calculate_timeseries:
return
# TODO: offer timeseries cache as an option. Then filter dates and terms after reading the cached matrix
print(f'Creating timeseries matrix...')
if cached_folder_name is None or not (
path.isfile(utils.pickle_name('weekly_series_terms', self.__cached_folder_name))
and path.isfile(utils.pickle_name('weekly_series_global', self.__cached_folder_name))
and path.isfile(utils.pickle_name('weekly_isodates', self.__cached_folder_name))):
self.__timeseries_data = self.__tfidf_reduce_obj.create_timeseries_data(self.__dates)
[self.__term_counts_per_week, self.__term_ngrams, self.__number_of_patents_per_week,
self.__weekly_iso_dates] = self.__timeseries_data
utils.pickle_object('weekly_series_terms', self.__term_counts_per_week, self.__cached_folder_name)
utils.pickle_object('weekly_series_global', self.__number_of_patents_per_week, self.__cached_folder_name)
utils.pickle_object('weekly_isodates', self.__weekly_iso_dates, self.__cached_folder_name)
else:
self.__term_counts_per_week = utils.unpickle_object('weekly_series_terms', self.__cached_folder_name)
self.__number_of_patents_per_week = utils.unpickle_object('weekly_series_global', self.__cached_folder_name)
self.__weekly_iso_dates = utils.unpickle_object('weekly_isodates', self.__cached_folder_name)
self.__term_ngrams = self.__tfidf_obj.feature_names
self.__M = m_steps_ahead
# TODO: define period from command line, then cascade through the code
term_counts_per_week_csc = self.__term_counts_per_week.tocsc()
self.__timeseries_quarterly = []
self.__timeseries_intercept = []
self.__timeseries_derivatives = []
self.__timeseries_quarterly_smoothed = []
self.__term_nonzero_dates = []
all_quarters, all_quarterly_values = self.__x = scripts.utils.date_utils.timeseries_weekly_to_quarterly(
self.__weekly_iso_dates, self.__number_of_patents_per_week)
# find indexes for date-range
min_date = max_date = None
if self.__timeseries_date_dict is not None:
min_date = self.__timeseries_date_dict['from']
max_date = self.__timeseries_date_dict['to']
min_i = 0
max_i = len(all_quarters)
for i, quarter in enumerate(all_quarters):
if min_date is not None and min_date < quarter:
break
min_i = i
for i, quarter in enumerate(all_quarters):
if max_date is not None and max_date < quarter:
break
max_i = i
self.__lims = [min_i, max_i]
self.__timeseries_quarterly_smoothed = None if sma is None else []
for term_index in tqdm(range(self.__term_counts_per_week.shape[1]), unit='term',
desc='Calculating quarterly timeseries',
leave=False, unit_scale=True):
row_indices, row_values = utils.get_row_indices_and_values(term_counts_per_week_csc, term_index)
weekly_iso_dates = [self.__weekly_iso_dates[x] for x in row_indices]
non_zero_dates, quarterly_values = scripts.utils.date_utils.timeseries_weekly_to_quarterly(weekly_iso_dates,
row_values)
non_zero_dates, quarterly_values = utils.fill_missing_zeros(quarterly_values, non_zero_dates, all_quarters)
self.__timeseries_quarterly.append(quarterly_values)
if emergence_index == 'gradients' or sma == 'kalman':
if cached_folder_name is None or not (
path.isfile(utils.pickle_name('smooth_series_s', self.__cached_folder_name))
and path.isfile(utils.pickle_name('derivatives', self.__cached_folder_name))):
for term_index, quarterly_values in tqdm(enumerate(self.__timeseries_quarterly), unit='term',
desc='smoothing quarterly timeseries with kalman filter',
leave=False, unit_scale=True,
total=len(self.__timeseries_quarterly)):
_, _1, smooth_series_s, _intercept = StateSpaceModel(quarterly_values).run_smoothing()
smooth_series = smooth_series_s[0].tolist()[0]
smooth_series_no_negatives = np.clip(smooth_series, a_min=0, a_max=None)
self.__timeseries_quarterly_smoothed.append(smooth_series_no_negatives.tolist())
derivatives = smooth_series_s[1].tolist()[0]
self.__timeseries_derivatives.append(derivatives)
utils.pickle_object('smooth_series_s', self.__timeseries_quarterly_smoothed, self.__cached_folder_name)
utils.pickle_object('derivatives', self.__timeseries_derivatives, self.__cached_folder_name)
else:
self.__timeseries_quarterly_smoothed = utils.unpickle_object('smooth_series_s',
self.__cached_folder_name)
self.__timeseries_derivatives = utils.unpickle_object('derivatives', self.__cached_folder_name)
if sma == 'savgol':
for quarterly_values in tqdm(self.__timeseries_quarterly, unit='term',
desc='savgol smoothing quarterly timeseries',
leave=False, unit_scale=True):
smooth_series = savgol_filter(quarterly_values, 9, 2, mode='nearest')
smooth_series_no_negatives = np.clip(smooth_series, a_min=0, a_max=None)
self.__timeseries_quarterly_smoothed.append(smooth_series_no_negatives.tolist())
em = Emergence(all_quarterly_values[min_i:max_i])
for term_index in tqdm(range(self.__term_counts_per_week.shape[1]), unit='term', desc='Calculating eScore',
leave=False, unit_scale=True):
if term_weights[term_index] == 0.0:
continue
term_ngram = self.__term_ngrams[term_index]
if self.__timeseries_quarterly_smoothed is not None:
quarterly_values = list(self.__timeseries_quarterly_smoothed[term_index])[min_i:max_i]
else:
quarterly_values = list(self.__timeseries_quarterly[term_index])[min_i:max_i]
if len(quarterly_values) == 0 or max(list(self.__timeseries_quarterly[term_index][min_i:max_i])) < float(
patents_per_quarter_threshold):
continue
if emergence_index == 'quadratic':
escore = em.escore2(quarterly_values)
elif emergence_index == 'porter':
if not em.is_emergence_candidate(quarterly_values):
continue
escore = em.calculate_escore(quarterly_values)
elif emergence_index == 'gradients':
derivatives = self.__timeseries_derivatives[term_index][min_i:max_i]
escore = em.net_growth(quarterly_values, derivatives)
else:
weekly_values = term_counts_per_week_csc.getcol(term_index).todense().ravel().tolist()[0]
escore = em.escore_exponential(weekly_values)
self.__emergence_list.append((term_ngram, escore))
nterms2 = min(nterms, len(self.__emergence_list))
self.__emergence_list.sort(key=lambda emergence: -emergence[1])
self.__emergent = [x[0] for x in self.__emergence_list[:nterms2]]
self.__declining = [x[0] for x in self.__emergence_list[-nterms2:]]
self.__declining.reverse()
self.__stationary = [x[0] for x in utils.stationary_terms(self.__emergence_list, nterms2)]
def __init__(
self,
data_filename,
docs_mask_dict,
pick_method='sum',
ngram_range=(1, 3),
text_header='abstract',
pickled_tfidf_folder_name=None,
max_df=0.1,
user_ngrams=None,
prefilter_terms=0,
terms_threshold=None,
output_name=None,
calculate_timeseries=None,
m_steps_ahead=5,
curves=True,
nterms=50,
minimum_patents_per_quarter=20,
):
# load data
self.__data_filename = data_filename
self.__date_dict = docs_mask_dict['date']
self.__timeseries_data = []
self.__emergence_list = []
self.__pick_method = pick_method
# calculate or fetch tf-idf mat
if pickled_tfidf_folder_name is None:
dataframe = data_factory.get(data_filename)
utils.checkdf(dataframe, calculate_timeseries, docs_mask_dict,
text_header)
utils.remove_empty_documents(dataframe, text_header)
self.__tfidf_obj = tfidf_from_text(
text_series=dataframe[text_header],
ngram_range=ngram_range,
max_document_frequency=max_df,
tokenizer=LemmaTokenizer())
tfidf_mask_obj = TfidfMask(self.__tfidf_obj,
ngram_range=ngram_range,
uni_factor=0.8,
unbias=True)
self.__tfidf_obj.apply_weights(tfidf_mask_obj.tfidf_mask)
if prefilter_terms != 0:
tfidf_reduce_obj = TfidfReduce(self.__tfidf_obj.tfidf_matrix,
self.__tfidf_obj.feature_names)
term_score_tuples = tfidf_reduce_obj.extract_ngrams_from_docset(
pick_method)
num_tuples_to_retain = min(prefilter_terms,
len(term_score_tuples))
feature_subset = sorted(
[x[1] for x in term_score_tuples[:num_tuples_to_retain]])
number_of_ngrams_before = len(self.__tfidf_obj.feature_names)
self.__tfidf_obj = tfidf_subset_from_features(
self.__tfidf_obj, feature_subset)
number_of_ngrams_after = len(self.__tfidf_obj.feature_names)
print(
f'Reduced number of terms by pre-filtering from {number_of_ngrams_before:,} '
f'to {number_of_ngrams_after:,}')
self.__cpc_dict = utils.cpc_dict(dataframe)
self.__dates = scripts.utils.date_utils.generate_year_week_dates(
dataframe, docs_mask_dict['date_header'])
base_pickle_path = path.join('outputs', 'tfidf')
makedirs(base_pickle_path, exist_ok=True)
def pickle_object(short_name, obj):
folder_name = path.join(base_pickle_path,
output_name + f'-mdf-{max_df}')
makedirs(folder_name, exist_ok=True)
file_name = path.join(
folder_name,
output_name + f'-mdf-{max_df}-{short_name}.pkl.bz2')
with bz2.BZ2File(file_name, 'wb') as pickle_file:
pickle.dump(obj,
pickle_file,
protocol=4,
fix_imports=False)
pickle_object('tfidf', self.__tfidf_obj)
pickle_object('dates', self.__dates)
pickle_object('cpc_dict', self.__cpc_dict)
else:
print(
f'Reading document and TFIDF from pickle {pickled_tfidf_folder_name}'
)
base_folder = path.basename(pickled_tfidf_folder_name)
pickled_base_file_name = path.join(pickled_tfidf_folder_name,
base_folder)
self.__tfidf_obj = read_pickle(pickled_base_file_name +
'-tfidf.pkl.bz2')
self.__dates = read_pickle(pickled_base_file_name +
'-dates.pkl.bz2')
self.__cpc_dict = read_pickle(pickled_base_file_name +
'-cpc_dict.pkl.bz2')
if self.__dates is not None:
min_date = min(self.__dates)
max_date = max(self.__dates)
print(
f'Document year-week dates range from {min_date // 100}-{(min_date % 100):02d} '
f'to {max_date // 100}-{(max_date % 100):02d}')
WordAnalyzer.init(tokenizer=LemmaTokenizer(),
preprocess=lowercase_strip_accents_and_ownership,
ngram_range=ngram_range)
# todo: pipeline is now a one-way trip of data, slowly collapsing / shrinking it as we don't need to keep
# the original. We're really just filtering down.
# todo: build up a list of functions to apply as document filters. all filters to have common args (c/o
# partialfunc if required) so we can then call them in sequence...
# from a combiner.
# each func just returns an array of bool (or 0/1)
# if union - create union combiner, else create intersection combiner. combiner = union if... else intersection
# weights = combiner(list of funcs, data set)
# combiner: if list is empty, return [1] * size; if single entry, return its array
# union: if more entries after single, add / or
# intersection: if more entries after single, multiple / and
# then apply mask to tfidf object and df (i.e. remove rows with false or 0); do this in place
print(f'Applying documents filter...')
# docs weights( column, dates subset + time, citations etc.)
doc_filters = DocumentsFilter(
self.__dates, docs_mask_dict, self.__cpc_dict,
self.__tfidf_obj.tfidf_matrix.shape[0]).doc_filters
# todo: build up list of weight functions (left with single remaining arg etc via partialfunc)
# combine(list, tfidf) => multiplies weights together, then multiplies across tfidf (if empty, no side effect)
# todo: this is another weight function...
# term weights - embeddings
print(f'Applying terms filter...')
filter_terms_obj = FilterTerms(self.__tfidf_obj.feature_names,
user_ngrams,
threshold=terms_threshold)
term_weights = filter_terms_obj.ngram_weights_vec
# todo: replace tfidf_mask with isolated functions: clean_unigrams, unbias_ngrams;
# these operate directly on tfidf
# Hence return nothing - operate in place on tfidf.
print(f'Creating a masked tfidf matrix from filters...')
# tfidf mask ( doc_ids, doc_weights, embeddings_filter will all merge to a single mask in the future)
tfidf_mask_obj = TfidfMask(self.__tfidf_obj,
ngram_range=ngram_range,
uni_factor=0.8)
tfidf_mask_obj.update_mask(doc_filters, term_weights)
tfidf_mask = tfidf_mask_obj.tfidf_mask
# todo: this mutiply and remove null will disappear - maybe put weight combiner last so it can remove 0 weights
# mask the tfidf matrix
tfidf_masked = tfidf_mask.multiply(self.__tfidf_obj.tfidf_matrix)
tfidf_masked, self.__dates = utils.remove_all_null_rows_global(
tfidf_masked, self.__dates)
print(f'Processing TFIDF matrix of {tfidf_masked.shape[0]:,}'
f' / {self.__tfidf_obj.tfidf_matrix.shape[0]:,} documents')
# todo: no advantage in classes - just create term_count and extract_ngrams as functions
self.__tfidf_reduce_obj = TfidfReduce(tfidf_masked,
self.__tfidf_obj.feature_names)
self.__timeseries_data = None
# if other outputs
self.__term_score_tuples = self.__tfidf_reduce_obj.extract_ngrams_from_docset(
pick_method)
self.__term_score_tuples = utils.stop_tup(
self.__term_score_tuples, WordAnalyzer.stemmed_stop_word_set_uni,
WordAnalyzer.stemmed_stop_word_set_n)
# todo: no output method; just if statements to call output functions...?
# Only supply what they each directly require
# todo: hence Pipeline then becomes a single function
if not calculate_timeseries:
return
print(f'Creating timeseries matrix...')
self.__timeseries_data = self.__tfidf_reduce_obj.create_timeseries_data(
self.__dates)
[
self.__term_counts_per_week, self.__term_ngrams,
self.__number_of_patents_per_week, self.__weekly_iso_dates
] = self.__timeseries_data
self.__M = m_steps_ahead
term_counts_per_week_csc = self.__term_counts_per_week.tocsc()
em = Emergence(self.__number_of_patents_per_week)
for term_index in tqdm(range(self.__term_counts_per_week.shape[1]),
unit='term',
desc='Calculating eScore',
leave=False,
unit_scale=True):
term_ngram = self.__term_ngrams[term_index]
row_indices, row_values = utils.get_row_indices_and_values(
term_counts_per_week_csc, term_index)
if len(row_values) == 0:
continue
weekly_iso_dates = [
self.__weekly_iso_dates[x] for x in row_indices
]
_, quarterly_values = scripts.utils.date_utils.timeseries_weekly_to_quarterly(
weekly_iso_dates, row_values)
if max(quarterly_values) < minimum_patents_per_quarter:
continue
if em.init_vars(row_indices, row_values, porter=not curves):
escore = em.calculate_escore() if not curves else em.escore2()
self.__emergence_list.append((term_ngram, escore))
nterms2 = min(nterms, len(self.__emergence_list))
self.__emergence_list.sort(key=lambda emergence: -emergence[1])
self.__emergent = [x[0] for x in self.__emergence_list[:nterms2]]
self.__declining = [x[0] for x in self.__emergence_list[-nterms2:]]
self.__stationary = utils.stationary_terms(self.__emergence_list,
nterms2)
def test_reads_pickles(self):
df = factory.get('data/USPTO-random-100.pkl.bz2')
self.assertEquals(len(df['abstract']), 100)
def test_reads_csv(self):
df = factory.get('data/USPTO-random-100.csv')
self.assertListEqual(list(self.__df['abstract']), list(df['abstract']))
def test_reads_xlsx(self):
df = factory.get('tests/data/USPTO-random-100.xlsx')
self.assertListEqual(list(self.__df['abstract']), list(df['abstract']))
def __init__(self,
data_filename,
docs_mask_dict,
pick_method='sum',
ngram_range=(1, 3),
normalize_rows=False,
text_header='abstract',
term_counts=False,
pickled_tf_idf_file_name=None,
max_df=0.1,
user_ngrams=None,
output_name=None,
emerging_technology=None):
# load data
self.__data_filename = data_filename
self.__date_dict = docs_mask_dict['date']
self.__time = docs_mask_dict['time']
self.__pick_method = pick_method
# calculate or fetch tf-idf mat
if pickled_tf_idf_file_name is None:
self.__dataframe = datafactory.get(data_filename)
checkdf(self.__dataframe, emerging_technology, docs_mask_dict,
text_header, term_counts)
remove_empty_documents(self.__dataframe, text_header)
self.__tfidf_obj = TFIDF(text_series=self.__dataframe[text_header],
ngram_range=ngram_range,
max_document_frequency=max_df,
tokenizer=LemmaTokenizer())
self.__text_lengths = self.__dataframe[text_header].map(
len).tolist()
self.__dataframe.drop(columns=[text_header], inplace=True)
tfidf_filename = path.join(
'outputs', 'tfidf',
output_name + f'-tfidf-mdf-{max_df}.pkl.bz2')
makedirs(path.dirname(tfidf_filename), exist_ok=True)
with bz2.BZ2File(tfidf_filename, 'wb') as pickle_file:
pickle.dump(
(self.__tfidf_obj, self.__dataframe, self.__text_lengths),
pickle_file,
protocol=4)
else:
print(
f'Reading document and TFIDF from pickle {pickled_tf_idf_file_name}'
)
self.__tfidf_obj, self.__dataframe, self.__text_lengths = read_pickle(
pickled_tf_idf_file_name)
if docs_mask_dict['date_header'] is None:
print('Document dates not specified')
else:
min_date = min(self.__dataframe[docs_mask_dict['date_header']])
max_date = max(self.__dataframe[docs_mask_dict['date_header']])
print(
f'Document dates range from {min_date:%Y-%m-%d} to {max_date:%Y-%m-%d}'
)
WordAnalyzer.init(tokenizer=LemmaTokenizer(),
preprocess=lowercase_strip_accents_and_ownership,
ngram_range=ngram_range)
# todo: pipeline is now a one-way trip of data, slowly collapsing / shrinking it as we don't need to keep
# the original. We're really just filtering down.
# todo: build up a list of functions to apply as document filters. all filters to have common args (c/o
# partialfunc if required) so we can then call them in sequence...
# from a combiner.
# each func just returns an array of bool (or 0/1)
# if union - create union combiner, else create intersection combiner. combiner = union if... else intersection
# weights = combiner(list of funcs, data set)
# combiner: if list is empty, return [1] * size; if single entry, return its array
# union: if more entries after single, add / or
# intersection: if more entries after single, multiple / and
# then apply mask to tfidf object and df (i.e. remove rows with false or 0); do this in place
# docs weights( column, dates subset + time, citations etc.)
doc_filters = DocumentsFilter(self.__dataframe,
docs_mask_dict).doc_weights
# todo: build up list of weight functions (left with single remaining arg etc via partialfunc)
# combine(list, tfidf) => multiplies weights together, then multiplies across tfidf (if empty, no side effect)
doc_weights = DocumentsWeights(self.__dataframe,
docs_mask_dict['time'],
docs_mask_dict['cite'],
docs_mask_dict['date_header'],
self.__text_lengths,
norm_rows=normalize_rows).weights
doc_weights = [a * b for a, b in zip(doc_filters, doc_weights)]
# todo: this is another weight function...
# term weights - embeddings
filter_terms_obj = FilterTerms(self.__tfidf_obj.feature_names,
user_ngrams,
threshold=0.75)
term_weights = filter_terms_obj.ngram_weights_vec
# todo: replace tfidf_mask with isolated functions: clean_unigrams, unbias_ngrams;
# these operate directly on tfidf
# Hence return nothing - operate in place on tfidf.
# tfidf mask ( doc_ids, doc_weights, embeddings_filter will all merge to a single mask in the future)
tfidf_mask_obj = TfidfMask(self.__tfidf_obj,
ngram_range=ngram_range,
uni_factor=0.8)
tfidf_mask_obj.update_mask(doc_weights, term_weights)
tfidf_mask = tfidf_mask_obj.tfidf_mask
# todo: this mutiply and remove null will disappear - maybe put weight combiner last so it can remove 0 weights
# mask the tfidf matrix
tfidf_matrix = self.__tfidf_obj.tfidf_matrix
tfidf_masked = tfidf_mask.multiply(tfidf_matrix)
tfidf_masked = utils.remove_all_null_rows(tfidf_masked)
print(
f'Processing TFIDF matrix of {tfidf_masked.shape[0]:,} / {tfidf_matrix.shape[0]:,} documents'
)
# todo: no advantage in classes - just create term_count and extract_ngrams as functions
self.__tfidf_reduce_obj = TfidfReduce(tfidf_masked,
self.__tfidf_obj.feature_names)
self.__term_counts_data = None
if term_counts or emerging_technology:
self.__term_counts_data = self.__tfidf_reduce_obj.create_terms_count(
self.__dataframe, docs_mask_dict['date_header'])
# if other outputs
self.__term_score_tuples = self.__tfidf_reduce_obj.extract_ngrams_from_docset(
pick_method)
self.__term_score_tuples = utils.stop_tup(
self.__term_score_tuples, WordAnalyzer.stemmed_stop_word_set_uni,
WordAnalyzer.stemmed_stop_word_set_n)
