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# The new class FASTsearch. Every DB can be represented in Lists. The Brain actually is constituted from lists. Access to all Documents almost the same moment. |
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# TODO GPU Multithreading has to be implemented. |
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# USAGE: Learn scikit-learn count vectorizer on a database of lines or docs. |
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import joblib |
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from sklearn.feature_extraction.text import CountVectorizer |
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import numpy as np |
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import scipy as sc |
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import tensorflow as tf |
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import _pickle as cPickle |
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import hickle as hkl |
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import os |
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# Define function to convert scipy csr matrix to tf tensor for working on gpu |
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def convert_sparse_matrix_to_sparse_tensor(X): |
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coo = sc.sparse.coo_matrix(X) |
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indices = np.mat([coo.row, coo.col]).transpose() |
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return tf.SparseTensorValue(indices, coo.data, coo.shape) |
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# The whole class is initialized with input of the database in [['word','word2'],[],[],[]] List format, 2 dimensional, the index of the list in the matrix defines its id |
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## in every list element of the input, each document is represented by one string |
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# This list must be saved as a hkl dump and then loaded into the database. |
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def my_tokenizer(s): |
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return s.split('\+') |
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class FASTsearch(object): |
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def __init__(self, DatabaseDir): |
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self.DatabaseDir = DatabaseDir[:-4] |
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database = [] |
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hkl_load = hkl.load(DatabaseDir) |
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for element in hkl_load: |
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#print('element',element) |
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#print('joined element', ' '.join(element)) |
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database.append(' '.join(element)) |
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# input has to be hkl format |
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self.database = database |
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def Gen_BoW_Model(self, max_features, analyzer, punctuation = False): |
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print("Creating the bag of words...\n") |
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from sklearn.feature_extraction.text import CountVectorizer |
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# Initialize the "CountVectorizer" object, which is scikit-learn's |
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# bag of words tool. |
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if punctuation == False: |
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vectorizer = CountVectorizer(analyzer = analyzer, \ |
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tokenizer = None, \ |
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preprocessor = None, \ |
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stop_words = None, \ |
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max_features = max_features) |
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if punctuation == True: |
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vectorizer = CountVectorizer(analyzer = analyzer, \ |
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tokenizer = my_tokenizer, \ |
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preprocessor = None, \ |
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stop_words = None, \ |
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max_features = max_features) |
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# token_pattern = r'(?u)\w') |
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# fit_transform() does two functions: First, it fits the model |
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# and learns the vocabulary; second, it transforms our training data |
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# into feature vectors. The input to fit_transform should be a list of |
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# strings. |
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train_data_features = vectorizer.fit_transform(self.database) |
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joblib.dump(vectorizer, 'bagofwords' + self.DatabaseDir + '.pkl') |
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print('dumping the data to hkl format..') |
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hkl.dump(train_data_features, 'DataBaseOneZeros' + self.DatabaseDir + '.hkl', mode='w', compression='gzip') |
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print('done') |
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return vectorizer |
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def Load_BoW_Model(self, BoWModelDir, DatabaseOneZerosDir): |
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# input has to be pkl format |
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self.vectorizer = joblib.load(BoWModelDir) |
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self.dbOZ = hkl.load(DatabaseOneZerosDir).astype('float32') |
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return self.vectorizer |
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# input: string to search for in the documents, the numberofmatches to get the best n documents |
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# output the numberofmatches documents with their indexes on the database which is searched, the highest accordance number plus index [index, number] |
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def search(self, string , numberofmatches): |
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numberofmatches = numberofmatches |
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# Convert user input to Zeros and Ones |
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user_array = [] |
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user_array.append(string) |
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user_input_OnesZeros = self.vectorizer.transform(user_array) |
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uOZ = user_input_OnesZeros.toarray()[0].astype(np.float32, copy=False) |
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uiOZ = uOZ[np.newaxis, :] |
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uiOZ = uiOZ.transpose() |
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sess = tf.Session() |
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with tf.device('/gpu:0'): |
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with sess.as_default(): |
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uiOZ_tensor = tf.constant(uiOZ) |
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dbOZ_tensor_sparse = convert_sparse_matrix_to_sparse_tensor(self.dbOZ) |
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#uiOZ_tensor_sparse =tf.contrib.layers.dense_to_sparse(uiOZ_tensor, eos_token=0, outputs_collections=None, scope=None ) |
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#dbOZ_tensor_sparse =tf.contrib.layers.dense_to_sparse(dbOZ_tensor, eos_token=0, outputs_collections=None, scope=None ) |
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#wordCountDoku = tf.matmul(uiOZ_tensor, dbOZ_tensor) |
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wordCountDoku = tf.sparse_tensor_dense_matmul(dbOZ_tensor_sparse, uiOZ_tensor) |
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wCD = np.array(wordCountDoku.eval()) |
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indexedwCD = [] |
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for n in range(len(wCD)): |
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indexedwCD.append([n,wCD[n][0]]) |
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indexedwCD = sorted(indexedwCD[::-1], key=lambda tup: tup[1], reverse=True) |
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best_n_documents = [] |
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eq_number = 0 |
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for number in uiOZ: |
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#print(number) |
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eq_number += number ** 2 |
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#print(eq_number) |
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n = 0 |
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done = False |
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while n < len(indexedwCD) and done == False: |
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n += 1 |
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if indexedwCD[n][1] == eq_number: |
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best_n_documents = indexedwCD[n][0] |
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done = True |
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if indexedwCD[n][1] < eq_number: |
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best_n_documents = indexedwCD[n - 1][0] |
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done = True |
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#for n in range(numberofmatches): |
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#best_n_documents.append([indexedwCD[n][0], indexedwCD[n][1]]) |
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return best_n_documents, indexedwCD[0] |
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def search_with_highest_multiplikation_Output(self, string , numberofmatches): |
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numberofmatches = numberofmatches |
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# Convert user input to Zeros and Ones |
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user_array = [] |
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user_array.append(string) |
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user_input_OnesZeros = self.vectorizer.transform(user_array) |
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uOZ = user_input_OnesZeros.toarray()[0].astype(np.float32, copy=False) |
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uiOZ = uOZ[np.newaxis, :] |
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uiOZ = uiOZ.transpose() |
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sess = tf.Session() |
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with tf.device('/gpu:0'): |
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with sess.as_default(): |
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uiOZ_tensor = tf.constant(uiOZ) |
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dbOZ_tensor_sparse = convert_sparse_matrix_to_sparse_tensor(self.dbOZ) |
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#uiOZ_tensor_sparse =tf.contrib.layers.dense_to_sparse(uiOZ_tensor, eos_token=0, outputs_collections=None, scope=None ) |
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#dbOZ_tensor_sparse =tf.contrib.layers.dense_to_sparse(dbOZ_tensor, eos_token=0, outputs_collections=None, scope=None ) |
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#wordCountDoku = tf.matmul(uiOZ_tensor, dbOZ_tensor) |
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wordCountDoku = tf.sparse_tensor_dense_matmul(dbOZ_tensor_sparse, uiOZ_tensor) |
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wCD = np.array(wordCountDoku.eval()) |
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indexedwCD = [] |
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for n in range(len(wCD)): |
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indexedwCD.append([n,wCD[n][0]]) |
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indexedwCD = sorted(indexedwCD[::-1], key=lambda tup: tup[1], reverse=True) |
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best_n_documents = [] |
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for n in range(numberofmatches): |
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best_n_documents.append(indexedwCD[n][0]) |
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return best_n_documents, indexedwCD[0] |
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def searchPatternMatch(self, string , numberofmatches): |
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numberofmatches = numberofmatches |
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# Convert user input to Zeros and Ones |
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user_array = [] |
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user_array.append(string) |
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user_input_OnesZeros = self.vectorizer.transform(user_array) |
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uOZ = user_input_OnesZeros.toarray()[0].astype(np.float32, copy=False) |
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uiOZ = uOZ[np.newaxis, :] |
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uiOZ = uiOZ.transpose() |
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sess = tf.Session() |
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with tf.device('/gpu:0'): |
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with sess.as_default(): |
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uiOZ_tensor = tf.constant(uiOZ) |
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dbOZ_tensor_sparse = convert_sparse_matrix_to_sparse_tensor(self.dbOZ) |
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#uiOZ_tensor_sparse =tf.contrib.layers.dense_to_sparse(uiOZ_tensor, eos_token=0, outputs_collections=None, scope=None ) |
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#dbOZ_tensor_sparse =tf.contrib.layers.dense_to_sparse(dbOZ_tensor, eos_token=0, outputs_collections=None, scope=None ) |
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#wordCountDoku = tf.matmul(uiOZ_tensor, dbOZ_tensor) |
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wordCountDoku = tf.sparse_tensor_dense_matmul(dbOZ_tensor_sparse, uiOZ_tensor) |
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wCD = np.array(wordCountDoku.eval()) |
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indexedwCD = [] |
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for n in range(len(wCD)): |
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indexedwCD.append([n,wCD[n][0]]) |
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# Sort the biggest matches |
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indexedwCD = sorted(indexedwCD[::-1], key=lambda tup: tup[1], reverse=True) |
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best_n_documents = [] |
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best_docs_surrounding = [] |
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# Get the number which is result when same words would be in the document as in one grammar scheme |
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eq_number = 0 |
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for number in uiOZ: |
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#print(number) |
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eq_number += number ** 2 |
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print(eq_number) |
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# Create new array of closest grammar schemes, I have chosen around 3 (in the matchnumber, not regarding words or so) |
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n = 0 |
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done = False |
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while n < len(indexedwCD) and done == False: |
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n += 1 |
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#print('a',indexedwCD) |
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#print('oo', indexedwCD[n]) |
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if indexedwCD[n][1] == eq_number: |
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best_docs_surrounding.append(indexedwCD[n][0]) |
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#if indexedwCD[n][1] < eq_number: |
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#best_docs_surrounding.append(indexedwCD[n][0]) |
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if indexedwCD[n][1] < eq_number : |
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done = True |
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# Count for these docs in surrounding the matches of wordnumbers per word |
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# would be much faster when using the sparse class |
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best_docs_surrounding_new = [] |
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for doc in best_docs_surrounding: |
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dok_BoW = self.dbOZ[doc].toarray()[0].astype(np.float32, copy=False) |
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Number_equal_words = 0 |
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for n in range(len(uiOZ)): |
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#print(uiOZ[n]) |
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#print(dok_BoW[n]) |
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#print('dok_BoW',dok_BoW) |
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if uiOZ[n] == dok_BoW[n]: |
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Number_equal_words += 1 |
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best_docs_surrounding_new.append([doc , Number_equal_words]) |
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# Sort the result again with the original indexes |
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best_n_documents = sorted(best_docs_surrounding_new[::-1], key=lambda tup: tup[1], reverse=True) |
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#for n in range(numberofmatches): |
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#best_n_documents.append([indexedwCD[n][0], indexedwCD[n][1]]) |
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return best_n_documents |
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