Kaggle competition: Whose line is it anyway?
<SOS> metric: categorizationaccuracy Kaggle data source: whose-line-is-it-anyway?<predict_on_test>
print(os.listdir(".. /input"))
pred_glove_val_y = model.predict([val_X], batch_size=1024, verbose=1)
 for thresh in np.arange(0.1, 0.501, 0.01):
thresh = np.round(thresh, 2)
 print("F1 score at threshold {0} is {1}".format(thresh, metrics.f1_score(val_y,(pred_glove_val_y>thresh ).astype(int))))<predict_on_test>
train_df = pd.read_csv('.. /input/train.csv' )
pred_glove_test_y = model.predict([test_X], batch_size=1024, verbose=1 )<set_options>
train_data = []
for i, row in train_df.iterrows() :
for text in row['text'].split('.'):
train_data.append([row['president'], text])
 train_data = pd.DataFrame(train_data, columns=['president', 'text'] )
del word_index, embeddings_index, all_embs, embedding_matrix, model, inp, x
time.sleep(10 )<statistical_test>
def remove_punctuation_numbers(text):
punc_numbers = string.punctuation + '0123456789'
return ''.join([l for l in text if l not in punc_numbers] )
EMBEDDING_FILE = '.. /input/embeddings/wiki-news-300d-1M/wiki-news-300d-1M.vec'
def get_coefs(word,*arr): return word, np.asarray(arr, dtype='float32')
 embeddings_index = dict(get_coefs(*o.split(" ")) for o in open(EMBEDDING_FILE)if len(o)>100)
 all_embs = np.stack(embeddings_index.values())
 emb_mean,emb_std = all_embs.mean() , all_embs.std()
embed_size = all_embs.shape[1]
word_index = tokenizer.word_index
nb_words = min(max_features, len(word_index))
embedding_matrix = np.random.normal(emb_mean, emb_std,(nb_words, embed_size))
for word, i in word_index.items() :
if i >= max_features: continue
embedding_vector = embeddings_index.get(word)
 if embedding_vector is not None: embedding_matrix[i] = embedding_vector
inp = Input(shape=(maxlen,))
x = Embedding(max_features, embed_size, weights=[embedding_matrix], trainable=False )(inp)
 x = Bidirectional(CuDNNLSTM(128, return_sequences=True))(x)
 x = Bidirectional(CuDNNLSTM(64, return_sequences=True))(x)
 x = Attention(maxlen )(x)
 x = Dense(64, activation="relu" )(x)
 x = Dense(1, activation="sigmoid" )(x)
 model = Model(inputs=inp, outputs=x)
 model.compile(loss='binary_crossentropy', optimizer=Adam(lr=1e-3), metrics=['accuracy'] )<train_model>
def tokeniser(text):
return TreebankWordTokenizer().tokenize(text )
model.fit(train_X, train_y, batch_size=512, epochs=3, validation_data=(val_X, val_y))<predict_on_test>
def lemmetizer(tokens):
wordnet_lemmatizer = WordNetLemmatizer()
return [wordnet_lemmatizer.lemmatize(word)for word in tokens]
pred_fasttext_val_y = model.predict([val_X], batch_size=1024, verbose=1)
 for thresh in np.arange(0.1, 0.501, 0.01):
thresh = np.round(thresh, 2)
 print("F1 score at threshold {0} is {1}".format(thresh, metrics.f1_score(val_y,(pred_fasttext_val_y>thresh ).astype(int))))<predict_on_test>
def remove_stop_words(tokens):
return [t for t in tokens if t not in set(stopwords.words('english')) ]
pred_fasttext_test_y = model.predict([test_X], batch_size=1024, verbose=1 )<set_options>
def data_cleaner(text):
text = text.lower()
text = remove_punctuation_numbers(text)
 lst = tokeniser(text)
 lst = remove_stop_words(lst)
 return ' '.join(lemmetizer(lst))
del word_index, embeddings_index, all_embs, embedding_matrix, model, inp, x
time.sleep(10 )<statistical_test>
train_data['clean_text'] = train_data['text'].apply(data_cleaner )
EMBEDDING_FILE = '.. /input/embeddings/paragram_300_sl999/paragram_300_sl999.txt'
def get_coefs(word,*arr): return word, np.asarray(arr, dtype='float32')
 embeddings_index = dict(get_coefs(*o.split(" ")) for o in open(EMBEDDING_FILE, encoding="utf8", errors='ignore')if len(o)>100)
 all_embs = np.stack(embeddings_index.values())
 emb_mean,emb_std = all_embs.mean() , all_embs.std()
embed_size = all_embs.shape[1]
word_index = tokenizer.word_index
nb_words = min(max_features, len(word_index))
embedding_matrix = np.random.normal(emb_mean, emb_std,(nb_words, embed_size))
for word, i in word_index.items() :
if i >= max_features: continue
embedding_vector = embeddings_index.get(word)
 if embedding_vector is not None: embedding_matrix[i] = embedding_vector
inp = Input(shape=(maxlen,))
x = Embedding(max_features, embed_size, weights=[embedding_matrix], trainable=False )(inp)
 x = Bidirectional(CuDNNLSTM(128, return_sequences=True))(x)
 x = Bidirectional(CuDNNLSTM(64, return_sequences=True))(x)
 x = Attention(maxlen )(x)
 x = Dense(64, activation="relu" )(x)
 x = Dense(1, activation="sigmoid" )(x)
 model = Model(inputs=inp, outputs=x)
 model.compile(loss='binary_crossentropy', optimizer=Adam(lr=1e-3), metrics=['accuracy'] )<train_model>
train_data.president = train_data.president.map({'deKlerk':0,'Mandela':1,
'Mbeki':2, 'Motlanthe':3,
'Zuma': 4, 'Ramaphosa':5} )
model.fit(train_X, train_y, batch_size=512, epochs=3, validation_data=(val_X, val_y))<predict_on_test>
X = train_data.clean_text
y = train_data.president
X_train, X_test, y_train, y_test = train_test_split(X, y,
test_size=0.33,
random_state=0,
stratify=y )
pred_paragram_val_y = model.predict([val_X], batch_size=1024, verbose=1)
 for thresh in np.arange(0.1, 0.501, 0.01):
thresh = np.round(thresh, 2)
 print("F1 score at threshold {0} is {1}".format(thresh, metrics.f1_score(val_y,(pred_paragram_val_y>thresh ).astype(int))))<predict_on_test>
vect = CountVectorizer(ngram_range=(1,2))
pred_paragram_test_y = model.predict([test_X], batch_size=1024, verbose=1 )<set_options>
X_train_ = vect.fit_transform(X_train )
del word_index, embeddings_index, all_embs, embedding_matrix, model, inp, x
time.sleep(10 )<find_best_params>
log = LogisticRegressionCV(dual=False, penalty='l2', multi_class='multinomial' )
pred_val_y =(3 * pred_glove_val_y + 2 * pred_fasttext_val_y + 3 * pred_paragram_val_y + 2 * pred_cnn_val_y)/ 10.0
thresholds = []
for thresh in np.arange(0.1, 0.501, 0.01):
thresh = np.round(thresh, 2)
 res = metrics.f1_score(val_y,(pred_val_y > thresh ).astype(int))
thresholds.append([thresh, res])
 print("F1 score at threshold {0} is {1}".format(thresh, res))
thresholds.sort(key=lambda x: x[1], reverse=True)
 best_thresh = thresholds[0][0]
print("Best threshold: ", best_thresh )<save_to_csv>
log.fit(X_train_, y_train )
pred_test_y =(4 * pred_glove_test_y + pred_fasttext_test_y + 3 * pred_paragram_test_y + 2 * pred_cnn_test_y)/ 10.0
pred_test_y =(pred_test_y > best_thresh ).astype(int)
 out_df = pd.DataFrame({"qid":test_df["qid"].values})
 out_df['prediction'] = pred_test_y
out_df.to_csv("submission.csv", index=False )<import_modules>
print(accuracy_score(y_train, log.predict(X_train_)) )
import re
import time
import gc
import random
import os
import numpy as np
import pandas as pd
from tqdm import tqdm
from sklearn.model_selection import train_test_split
from sklearn import metrics
from sklearn.model_selection import GridSearchCV, StratifiedKFold
from sklearn.metrics import f1_score, roc_auc_score
from tensorflow.keras.preprocessing.text import Tokenizer
from tensorflow.keras.preprocessing.sequence import pad_sequences
import torch
import torch.nn as nn
import torch.utils.data<set_options>
print(accuracy_score(y_test, log.predict(vect.transform(X_test))))
def seed_torch(seed=1029):
random.seed(seed)
 os.environ['PYTHONHASHSEED'] = str(seed)
 np.random.seed(seed)
 torch.manual_seed(seed)
 torch.cuda.manual_seed(seed)
 torch.backends.cudnn.deterministic = True<define_variables>
test_data = pd.read_csv('.. /input/test.csv' )
embed_size = 300
max_features = 120000
maxlen = 72
batch_size = 1536
train_epochs = 8
SEED = 1029<define_variables>
test_data.text = test_data.text.apply(data_cleaner )
puncts = [',', '.', '"', ':', ')', '(', '-', '!', '?', '|', ';', "'", '$', '&', '/', '[', ']', '>', '%', '=', '
'·', '_', '{', '}', '©', '^', '®', '`', '<', '→', '°', '€', '™', '›', '♥', '←', '×', '§', '″', '′', 'Â', '█', '½', 'à', '…',
'“', '★', '”', '–', '●', 'â', '►', '−', '¢', '²', '¬', '░', '¶', '↑', '±', '¿', '▾', '═', '¦', '║', '―', '¥', '▓', '—', '‹', '─',
'▒', '：', '¼', '⊕', '▼', '▪', '†', '■', '’', '▀', '¨', '▄', '♫', '☆', 'é', '¯', '♦', '¤', '▲', 'è', '¸', '¾', 'Ã', '⋅', '‘', '∞',
'∙', '）', '↓', '、', '│', '（', '»', '，', '♪', '╩', '╚', '³', '・', '╦', '╣', '╔', '╗', '▬', '❤', 'ï', 'Ø', '¹', '≤', '‡', '√', ]
def clean_text(x):
x = str(x)
 for punct in puncts:
x = x.replace(punct, f' {punct} ')
 return x
def clean_numbers(x):
x = re.sub('[0-9]{5,}', '
x = re.sub('[0-9]{4}', '
x = re.sub('[0-9]{3}', '
x = re.sub('[0-9]{2}', '
return x
mispell_dict = {"aren't" : "are not",
"can't" : "cannot",
"couldn't" : "could not",
"didn't" : "did not",
"doesn't" : "does not",
"don't" : "do not",
"hadn't" : "had not",
"hasn't" : "has not",
"haven't" : "have not",
"he'd" : "he would",
"he'll" : "he will",
"he's" : "he is",
"i'd" : "I would",
"i'd" : "I had",
"i'll" : "I will",
"i'm" : "I am",
"isn't" : "is not",
"it's" : "it is",
"it'll":"it will",
"i've" : "I have",
"let's" : "let us",
"mightn't" : "might not",
"mustn't" : "must not",
"shan't" : "shall not",
"she'd" : "she would",
"she'll" : "she will",
"she's" : "she is",
"shouldn't" : "should not",
"that's" : "that is",
"there's" : "there is",
"they'd" : "they would",
"they'll" : "they will",
"they're" : "they are",
"they've" : "they have",
"we'd" : "we would",
"we're" : "we are",
"weren't" : "were not",
"we've" : "we have",
"what'll" : "what will",
"what're" : "what are",
"what's" : "what is",
"what've" : "what have",
"where's" : "where is",
"who'd" : "who would",
"who'll" : "who will",
"who're" : "who are",
"who's" : "who is",
"who've" : "who have",
"won't" : "will not",
"wouldn't" : "would not",
"you'd" : "you would",
"you'll" : "you will",
"you're" : "you are",
"you've" : "you have",
"'re": " are",
"wasn't": "was not",
"we'll":" will",
"didn't": "did not",
"tryin'":"trying"}
def _get_mispell(mispell_dict):
mispell_re = re.compile('(%s)' % '|'.join(mispell_dict.keys()))
return mispell_dict, mispell_re
mispellings, mispellings_re = _get_mispell(mispell_dict)
 def replace_typical_misspell(text):
def replace(match):
return mispellings[match.group(0)]
return mispellings_re.sub(replace, text )<load_from_csv>
test_data['president'] = log.predict(vect.transform(test_data.text))
def load_and_prec() :
train_df = pd.read_csv(".. /input/train.csv")
 test_df = pd.read_csv(".. /input/test.csv")
 print("Train shape : ",train_df.shape)
 print("Test shape : ",test_df.shape)
 train_df["question_text"] = train_df["question_text"].progress_apply(lambda x: x.lower())
 test_df["question_text"] = test_df["question_text"].progress_apply(lambda x: x.lower())
 train_df["question_text"] = train_df["question_text"].progress_apply(lambda x: clean_text(x))
test_df["question_text"] = test_df["question_text"].progress_apply(lambda x: clean_text(x))
train_df["question_text"] = train_df["question_text"].progress_apply(lambda x: clean_numbers(x))
test_df["question_text"] = test_df["question_text"].progress_apply(lambda x: clean_numbers(x))
train_df["question_text"] = train_df["question_text"].progress_apply(lambda x: replace_typical_misspell(x))
test_df["question_text"] = test_df["question_text"].progress_apply(lambda x: replace_typical_misspell(x))
train_X = train_df["question_text"].fillna("_
test_X = test_df["question_text"].fillna("_
tokenizer = Tokenizer(num_words=max_features)
 tokenizer.fit_on_texts(list(train_X))
train_X = tokenizer.texts_to_sequences(train_X)
 test_X = tokenizer.texts_to_sequences(test_X)
 train_X = pad_sequences(train_X, maxlen=maxlen)
 test_X = pad_sequences(test_X, maxlen=maxlen)
 train_y = train_df['target'].values
np.random.seed(SEED)
 trn_idx = np.random.permutation(len(train_X))
train_X = train_X[trn_idx]
train_y = train_y[trn_idx]
return train_X, test_X, train_y, tokenizer.word_index<statistical_test>
test_data.drop('text', axis=1, inplace=True, )
<normalization><EOS> 
test_data.to_csv('Thapelo_log.csv',index=False )