Kaggle competition: Quora Insincere Questions Classification
<SOS> metric: FScore_1 Kaggle data source: quora-insincere-questions-classification<string_transform>
tqdm.pandas(desc='Progress')
min_count = 2
docs = create_docs(df)
 tokenizer = Tokenizer(lower=False, filters='')
 tokenizer.fit_on_texts(docs)
 num_words = sum([1 for _, v in tokenizer.word_counts.items() if v >= min_count])
 tokenizer = Tokenizer(num_words=num_words, lower=False, filters='')
 tokenizer.fit_on_texts(docs)
 docs = tokenizer.texts_to_sequences(docs)
 maxlen = 256
docs = pad_sequences(sequences=docs, maxlen=maxlen )<define_variables>
embed_size = 300
max_features = 120000
maxlen = 70
batch_size = 512
n_epochs = 5
n_splits = 5
SEED = 10
debug =0
input_dim = np.max(docs)+ 1
embedding_dims = 20<choose_model_class>
loss_fn = torch.nn.BCEWithLogitsLoss(reduction='sum' )
def create_model(embedding_dims=20, optimizer='adam'):
model = Sequential()
model.add(Embedding(input_dim=input_dim, output_dim=embedding_dims))
model.add(GlobalAveragePooling1D())
 model.add(Dense(3, activation='softmax'))
model.compile(loss='categorical_crossentropy',
optimizer=optimizer,
metrics=['accuracy'])
 return model<train_model>
def seed_everything(seed=10):
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
seed_everything()
epochs = 25
x_train, x_test, y_train, y_test = train_test_split(docs, y, test_size=0.2)
 model = create_model()
hist = model.fit(x_train, y_train,
batch_size=16,
validation_data=(x_test, y_test),
epochs=epochs,
callbacks=[EarlyStopping(patience=2, monitor='val_loss')] )<string_transform>
def load_glove(word_index):
EMBEDDING_FILE = '.. /input/embeddings/glove.840B.300d/glove.840B.300d.txt'
def get_coefs(word,*arr): return word, np.asarray(arr, dtype='float32')[:300]
embeddings_index = dict(get_coefs(*o.split(" ")) for o in open(EMBEDDING_FILE))
all_embs = np.stack(embeddings_index.values())
 emb_mean,emb_std = -0.005838499,0.48782197
embed_size = all_embs.shape[1]
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
else:
embedding_vector = embeddings_index.get(word.capitalize())
 if embedding_vector is not None:
embedding_matrix[i] = embedding_vector
return embedding_matrix
def load_fasttext(word_index):
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]
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
return embedding_matrix
def load_para(word_index):
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 = -0.0053247833,0.49346462
embed_size = all_embs.shape[1]
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
return embedding_matrix
docs = create_docs(df)
 tokenizer = Tokenizer(lower=True, filters='')
 tokenizer.fit_on_texts(docs)
 num_words = sum([1 for _, v in tokenizer.word_counts.items() if v >= min_count])
 tokenizer = Tokenizer(num_words=num_words, lower=True, filters='')
 tokenizer.fit_on_texts(docs)
 docs = tokenizer.texts_to_sequences(docs)
 maxlen = 256
docs = pad_sequences(sequences=docs, maxlen=maxlen)
 input_dim = np.max(docs)+ 1<train_model>
def build_vocab(texts):
sentences = texts.apply(lambda x: x.split() ).values
vocab = {}
for sentence in sentences:
for word in sentence:
try:
vocab[word] += 1
except KeyError:
vocab[word] = 1
return vocab
def known_contractions(embed):
known = []
for contract in contraction_mapping:
if contract in embed:
known.append(contract)
 return known
def clean_contractions(text, mapping):
specials = ["’", "‘", "´", "`"]
for s in specials:
text = text.replace(s, "'")
 text = ' '.join([mapping[t] if t in mapping else t for t in text.split(" ")])
 return text
def correct_spelling(x, dic):
for word in dic.keys() :
x = x.replace(word, dic[word])
 return x
def unknown_punct(embed, punct):
unknown = ''
for p in punct:
if p not in embed:
unknown += p
unknown += ' '
return unknown
def clean_special_chars(text, punct, mapping):
for p in mapping:
text = text.replace(p, mapping[p])
 for p in punct:
text = text.replace(p, f' {p} ')
 specials = {'\u200b': ' ', '…': '...', '\ufeff': '', 'करना': '', 'है': ''}
for s in specials:
text = text.replace(s, specials[s])
 return text
def add_lower(embedding, vocab):
count = 0
for word in vocab:
if word in embedding and word.lower() not in embedding:
embedding[word.lower() ] = embedding[word]
count += 1
print(f"Added {count} words to embedding")
epochs = 16
x_train, x_test, y_train, y_test = train_test_split(docs, y, test_size=0.2)
 model = create_model()
hist = model.fit(x_train, y_train,
batch_size=16,
validation_data=(x_test, y_test),
epochs=epochs,
callbacks=[EarlyStopping(patience=2, monitor='val_loss')] )<load_from_csv>
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:
if punct in x:
x = x.replace(punct, f' {punct} ')
 return x
def clean_numbers(x):
if bool(re.search(r'\d', 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 = {"ain't": "is not", "aren't": "are not","can't": "cannot", "'cause": "because", "could've": "could have", "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", "how'd": "how did", "how'd'y": "how do you", "how'll": "how will", "how's": "how is", "I'd": "I would", "I'd've": "I would have", "I'll": "I will", "I'll've": "I will have","I'm": "I am", "I've": "I have", "i'd": "i would", "i'd've": "i would have", "i'll": "i will", "i'll've": "i will have","i'm": "i am", "i've": "i have", "isn't": "is not", "it'd": "it would", "it'd've": "it would have", "it'll": "it will", "it'll've": "it will have","it's": "it is", "let's": "let us", "ma'am": "madam", "mayn't": "may not", "might've": "might have","mightn't": "might not","mightn't've": "might not have", "must've": "must have", "mustn't": "must not", "mustn't've": "must not have", "needn't": "need not", "needn't've": "need not have","o'clock": "of the clock", "oughtn't": "ought not", "oughtn't've": "ought not have", "shan't": "shall not", "sha'n't": "shall not", "shan't've": "shall not have", "she'd": "she would", "she'd've": "she would have", "she'll": "she will", "she'll've": "she will have", "she's": "she is", "should've": "should have", "shouldn't": "should not", "shouldn't've": "should not have", "so've": "so have","so's": "so as", "this's": "this is","that'd": "that would", "that'd've": "that would have", "that's": "that is", "there'd": "there would", "there'd've": "there would have", "there's": "there is", "here's": "here is","they'd": "they would", "they'd've": "they would have", "they'll": "they will", "they'll've": "they will have", "they're": "they are", "they've": "they have", "to've": "to have", "wasn't": "was not", "we'd": "we would", "we'd've": "we would have", "we'll": "we will", "we'll've": "we will have", "we're": "we are", "we've": "we have", "weren't": "were not", "what'll": "what will", "what'll've": "what will have", "what're": "what are", "what's": "what is", "what've": "what have", "when's": "when is", "when've": "when have", "where'd": "where did", "where's": "where is", "where've": "where have", "who'll": "who will", "who'll've": "who will have", "who's": "who is", "who've": "who have", "why's": "why is", "why've": "why have", "will've": "will have", "won't": "will not", "won't've": "will not have", "would've": "would have", "wouldn't": "would not", "wouldn't've": "would not have", "y'all": "you all", "y'all'd": "you all would","y'all'd've": "you all would have","y'all're": "you all are","y'all've": "you all have","you'd": "you would", "you'd've": "you would have", "you'll": "you will", "you'll've": "you will have", "you're": "you are", "you've": "you have", 'colour': 'color', 'centre': 'center', 'favourite': 'favorite', 'travelling': 'traveling', 'counselling': 'counseling', 'theatre': 'theater', 'cancelled': 'canceled', 'labour': 'labor', 'organisation': 'organization', 'wwii': 'world war 2', 'citicise': 'criticize', 'youtu ': 'youtube ', 'Qoura': 'Quora', 'sallary': 'salary', 'Whta': 'What', 'narcisist': 'narcissist', 'howdo': 'how do', 'whatare': 'what are', 'howcan': 'how can', 'howmuch': 'how much', 'howmany': 'how many', 'whydo': 'why do', 'doI': 'do I', 'theBest': 'the best', 'howdoes': 'how does', 'mastrubation': 'masturbation', 'mastrubate': 'masturbate', "mastrubating": 'masturbating', 'pennis': 'penis', 'Etherium': 'Ethereum', 'narcissit': 'narcissist', 'bigdata': 'big data', '2k17': '2017', '2k18': '2018', 'qouta': 'quota', 'exboyfriend': 'ex boyfriend', 'airhostess': 'air hostess', "whst": 'what', 'watsapp': 'whatsapp', 'demonitisation': 'demonetization', 'demonitization': 'demonetization', 'demonetisation': 'demonetization'}
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)
test_df = pd.read_csv('.. /input/test.csv')
 docs = create_docs(test_df)
 docs = tokenizer.texts_to_sequences(docs)
 docs = pad_sequences(sequences=docs, maxlen=maxlen)
 y = model.predict_proba(docs)
 result = pd.read_csv('.. /input/sample_submission.csv')
 for a, i in a2c.items() :
result[a] = y[:, i] 
<save_to_csv>
def parallelize_apply(df,func,colname,num_process,newcolnames):
pool =Pool(processes=num_process)
 arraydata = pool.map(func,tqdm(df[colname].values))
pool.close()
newdf = pd.DataFrame(arraydata,columns = newcolnames)
 df = pd.concat([df,newdf],axis=1)
 return df
def parallelize_dataframe(df, func):
df_split = np.array_split(df, 4)
 pool = Pool(4)
 df = pd.concat(pool.map(func, df_split))
pool.close()
pool.join()
return df
def count_regexp_occ(regexp="", text=None):

 return len(re.findall(regexp, text))
def add_features(df):
df['question_text'] = df['question_text'].progress_apply(lambda x:str(x))
df["lower_question_text"] = df["question_text"].apply(lambda x: x.lower())
 df['total_length'] = df['question_text'].progress_apply(len)
 df['capitals'] = df['question_text'].progress_apply(lambda comment: sum(1 for c in comment if c.isupper()))
df['caps_vs_length'] = df.progress_apply(lambda row: float(row['capitals'])/float(row['total_length']),
axis=1)
 df['num_words'] = df.question_text.str.count('\S+')
 df['num_unique_words'] = df['question_text'].progress_apply(lambda comment: len(set(w for w in comment.split())))
 df['words_vs_unique'] = df['num_unique_words'] / df['num_words']
return df
def load_and_prec() :
if debug:
train_df = pd.read_csv(".. /input/train.csv")[:80000]
test_df = pd.read_csv(".. /input/test.csv")[:20000]
else:
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 = parallelize_dataframe(train_df, add_features)
 test = parallelize_dataframe(test_df, add_features)
 train_df["question_text"] = train_df["question_text"].apply(lambda x: x.lower())
 test_df["question_text"] = test_df["question_text"].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"].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"].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"].apply(lambda x: replace_typical_misspell(x))
train_X = train_df["question_text"].fillna("_
test_X = test_df["question_text"].fillna("_
features = train[['num_unique_words','words_vs_unique']].fillna(0)
 test_features = test[['num_unique_words','words_vs_unique']].fillna(0)
 ss = StandardScaler()
pc = PCA(n_components=5)
 ss.fit(np.vstack(( features, test_features)))
 features = ss.transform(features)
 test_features = ss.transform(test_features)
 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]
features = features[trn_idx]
return train_X, test_X, train_y, features, test_features, tokenizer.word_index
result.to_csv('fastText_result.csv', index=False )<feature_engineering>
start = time.time()
x_train, x_test, y_train, features, test_features, word_index = load_and_prec()
print(time.time() -start )
np.random.seed(666)
 print(check_output(["ls", ".. /input"] ).decode("utf8"))
train = pd.read_csv(".. /input/train.csv")
 test = pd.read_csv(".. /input/test.csv")
 sample = pd.read_csv(".. /input/sample_submission.csv")
 train["EAP"] =(train.author=="EAP")*1
train["HPL"] =(train.author=="HPL")*1
train["MWS"] =(train.author=="MWS")*1
train.drop("author", 1, inplace=True)
 target_vars = ["EAP", "HPL", "MWS"]
train.head(2 )<feature_engineering>
seed_everything()
if debug:
paragram_embeddings = np.random.randn(120000,300)
 glove_embeddings = np.random.randn(120000,300)
 embedding_matrix = np.mean([glove_embeddings, paragram_embeddings], axis=0)
 else:
glove_embeddings = load_glove(word_index)
 paragram_embeddings = load_para(word_index)
 embedding_matrix = np.mean([glove_embeddings, paragram_embeddings], axis=0 )
eng_stopwords = set(stopwords.words("english"))
train["num_words"] = train["text"].apply(lambda x: len(str(x ).split()))
test["num_words"] = test["text"].apply(lambda x: len(str(x ).split()))
train["num_unique_words"] = train["text"].apply(lambda x: len(set(str(x ).split())))
 test["num_unique_words"] = test["text"].apply(lambda x: len(set(str(x ).split())))
 train["num_chars"] = train["text"].apply(lambda x: len(str(x)))
 test["num_chars"] = test["text"].apply(lambda x: len(str(x)))
 train["num_stopwords"] = train["text"].apply(lambda x: len([w for w in str(x ).lower().split() if w in eng_stopwords]))
test["num_stopwords"] = test["text"].apply(lambda x: len([w for w in str(x ).lower().split() if w in eng_stopwords]))
train["num_punctuations"] =train['text'].apply(lambda x: len([c for c in str(x)if c in string.punctuation]))
test["num_punctuations"] =test['text'].apply(lambda x: len([c for c in str(x)if c in string.punctuation]))
train["num_words_upper"] = train["text"].apply(lambda x: len([w for w in str(x ).split() if w.isupper() ]))
test["num_words_upper"] = test["text"].apply(lambda x: len([w for w in str(x ).split() if w.isupper() ]))
train["num_words_title"] = train["text"].apply(lambda x: len([w for w in str(x ).split() if w.istitle() ]))
test["num_words_title"] = test["text"].apply(lambda x: len([w for w in str(x ).split() if w.istitle() ]))
train["mean_word_len"] = train["text"].apply(lambda x: np.mean([len(w)for w in str(x ).split() ]))
test["mean_word_len"] = test["text"].apply(lambda x: np.mean([len(w)for w in str(x ).split() ]))
num_vars = ["mean_word_len", "num_words_title", "num_punctuations", "num_chars"
, "num_stopwords", "num_chars", "num_unique_words", "num_words"]<feature_engineering>
class CyclicLR(object):
def __init__(self, optimizer, base_lr=1e-3, max_lr=6e-3,
step_size=2000, mode='triangular', gamma=1.,
scale_fn=None, scale_mode='cycle', last_batch_iteration=-1):
if not isinstance(optimizer, Optimizer):
raise TypeError('{} is not an Optimizer'.format(
 type(optimizer ).__name__))
self.optimizer = optimizer
if isinstance(base_lr, list)or isinstance(base_lr, tuple):
if len(base_lr)!= len(optimizer.param_groups):
raise ValueError("expected {} base_lr, got {}".format(
 len(optimizer.param_groups), len(base_lr)))
 self.base_lrs = list(base_lr)
 else:
self.base_lrs = [base_lr] * len(optimizer.param_groups)
 if isinstance(max_lr, list)or isinstance(max_lr, tuple):
if len(max_lr)!= len(optimizer.param_groups):
raise ValueError("expected {} max_lr, got {}".format(
 len(optimizer.param_groups), len(max_lr)))
 self.max_lrs = list(max_lr)
 else:
self.max_lrs = [max_lr] * len(optimizer.param_groups)
 self.step_size = step_size
if mode not in ['triangular', 'triangular2', 'exp_range'] \
and scale_fn is None:
raise ValueError('mode is invalid and scale_fn is None')
 self.mode = mode
self.gamma = gamma
if scale_fn is None:
if self.mode == 'triangular':
self.scale_fn = self._triangular_scale_fn
self.scale_mode = 'cycle'
elif self.mode == 'triangular2':
self.scale_fn = self._triangular2_scale_fn
self.scale_mode = 'cycle'
elif self.mode == 'exp_range':
self.scale_fn = self._exp_range_scale_fn
self.scale_mode = 'iterations'
else:
self.scale_fn = scale_fn
self.scale_mode = scale_mode
self.batch_step(last_batch_iteration + 1)
 self.last_batch_iteration = last_batch_iteration
def batch_step(self, batch_iteration=None):
if batch_iteration is None:
batch_iteration = self.last_batch_iteration + 1
self.last_batch_iteration = batch_iteration
for param_group, lr in zip(self.optimizer.param_groups, self.get_lr()):
param_group['lr'] = lr
def _triangular_scale_fn(self, x):
return 1.
 def _triangular2_scale_fn(self, x):
return 1 /(2.**(x - 1))
def _exp_range_scale_fn(self, x):
return self.gamma**(x)
 def get_lr(self):
step_size = float(self.step_size)
 cycle = np.floor(1 + self.last_batch_iteration /(2 * step_size))
x = np.abs(self.last_batch_iteration / step_size - 2 * cycle + 1)
 lrs = []
param_lrs = zip(self.optimizer.param_groups, self.base_lrs, self.max_lrs)
 for param_group, base_lr, max_lr in param_lrs:
base_height =(max_lr - base_lr)* np.maximum(0,(1 - x))
if self.scale_mode == 'cycle':
lr = base_lr + base_height * self.scale_fn(cycle)
 else:
lr = base_lr + base_height * self.scale_fn(self.last_batch_iteration)
 lrs.append(lr)
 return lrs
stemmer = stm.SnowballStemmer("english")
 train["stem_text"] = train.text.apply(lambda x:(" " ).join([stemmer.stem(z)for z in re.sub("[^a-zA-Z0-9]"," ", x ).split(" ")]))
test["stem_text"] = test.text.apply(lambda x:(" " ).join([stemmer.stem(z)for z in re.sub("[^a-zA-Z0-9]"," ", x ).split(" ")]))
tok_raw = Tokenizer()
tok_raw.fit_on_texts(train.text.str.lower())
 tok_stem = Tokenizer()
tok_stem.fit_on_texts(train.stem_text)
 train["seq_text_stem"] = tok_stem.texts_to_sequences(train.stem_text)
 test["seq_text_stem"] = tok_stem.texts_to_sequences(test.stem_text)
<train_model>
class MyDataset(Dataset):
def __init__(self,dataset):
self.dataset = dataset
def __getitem__(self,index):
data,target = self.dataset[index]
return data,target,index
def __len__(self):
return len(self.dataset )
def get_keras_data(dataset, maxlen=20, scaler=None, tdfidf=None):
if scaler==None:
scaler = StandardScaler()
scaler.fit(dataset[num_vars])
 if tdfidf==None:
tdfidf = Pipeline(steps=[('tdfidf', TfidfVectorizer(analyzer='word', binary=False
, ngram_range=(1, 4), stop_words="english"))
,('svd', TruncatedSVD(algorithm='randomized', n_components=20, n_iter=10,
random_state=None, tol=0.0)
)])
 tdfidf.fit(dataset.text)
 X = {
"stem_input": pad_sequences(dataset.seq_text_stem, maxlen=maxlen),
"num_input": scaler.transform(dataset[num_vars]),
"svd_vect": tdfidf.transform(dataset.text)
 }
return X, scaler, tdfidf
maxlen = 60
dtrain, dvalid = train_test_split(train, random_state=123, train_size=0.9)
 print("processing train...")
 X_train, scaler, tdfidf = get_keras_data(dtrain, maxlen)
 y_train = np.array(dtrain[target_vars])
 print("processing valid...")
 X_valid, _, _ = get_keras_data(dvalid, maxlen, scaler, tdfidf)
 y_valid = np.array(dvalid[target_vars])
 print("processing test...")
 X_test, _, _ = get_keras_data(test, maxlen, scaler, tdfidf)
 n_stem_seq = np.max([np.max(X_valid["stem_input"]), np.max(X_train["stem_input"])])+1<choose_model_class>
def pytorch_model_run_cv(x_train,y_train,features,x_test, model_obj, feats = False,clip = True):
seed_everything()
avg_losses_f = []
avg_val_losses_f = []
train_preds = np.zeros(( len(x_train)))
 test_preds = np.zeros(( len(x_test)))
 splits = list(StratifiedKFold(n_splits=n_splits, shuffle=True, random_state=SEED ).split(x_train, y_train))
for i,(train_idx, valid_idx)in enumerate(splits):
seed_everything(i*1000+i)
 x_train = np.array(x_train)
 y_train = np.array(y_train)
 if feats:
features = np.array(features)
 x_train_fold = torch.tensor(x_train[train_idx.astype(int)], dtype=torch.long ).cuda()
y_train_fold = torch.tensor(y_train[train_idx.astype(int), np.newaxis], dtype=torch.float32 ).cuda()
if feats:
kfold_X_features = features[train_idx.astype(int)]
kfold_X_valid_features = features[valid_idx.astype(int)]
x_val_fold = torch.tensor(x_train[valid_idx.astype(int)], dtype=torch.long ).cuda()
y_val_fold = torch.tensor(y_train[valid_idx.astype(int), np.newaxis], dtype=torch.float32 ).cuda()
model = copy.deepcopy(model_obj)
 model.cuda()
loss_fn = torch.nn.BCEWithLogitsLoss(reduction='sum')
 step_size = 300
base_lr, max_lr = 0.001, 0.003
optimizer = torch.optim.Adam(filter(lambda p: p.requires_grad, model.parameters()),
lr=max_lr)
 scheduler = CyclicLR(optimizer, base_lr=base_lr, max_lr=max_lr,
step_size=step_size, mode='exp_range',
gamma=0.99994)
 train = MyDataset(torch.utils.data.TensorDataset(x_train_fold, y_train_fold))
valid = MyDataset(torch.utils.data.TensorDataset(x_val_fold, y_val_fold))
train_loader = torch.utils.data.DataLoader(train, batch_size=batch_size, shuffle=True)
 valid_loader = torch.utils.data.DataLoader(valid, batch_size=batch_size, shuffle=False)
 print(f'Fold {i + 1}')
 for epoch in range(n_epochs):
start_time = time.time()
model.train()
avg_loss = 0.
 for i,(x_batch, y_batch, index)in enumerate(train_loader):
if feats:
f = kfold_X_features[index]
y_pred = model([x_batch,f])
 else:
y_pred = model(x_batch)
 if scheduler:
scheduler.batch_step()
loss = loss_fn(y_pred, y_batch)
 optimizer.zero_grad()
loss.backward()
if clip:
nn.utils.clip_grad_norm_(model.parameters() ,1)
 optimizer.step()
avg_loss += loss.item() / len(train_loader)
 model.eval()
valid_preds_fold = np.zeros(( x_val_fold.size(0)))
 test_preds_fold = np.zeros(( len(x_test)))
 avg_val_loss = 0.
 for i,(x_batch, y_batch,index)in enumerate(valid_loader):
if feats:
f = kfold_X_valid_features[index]
y_pred = model([x_batch,f] ).detach()
else:
y_pred = model(x_batch ).detach()
avg_val_loss += loss_fn(y_pred, y_batch ).item() / len(valid_loader)
 valid_preds_fold[index] = sigmoid(y_pred.cpu().numpy())[:, 0]
elapsed_time = time.time() - start_time
print('Epoch {}/{} \t loss={:.4f} \t val_loss={:.4f} \t time={:.2f}s'.format(
 epoch + 1, n_epochs, avg_loss, avg_val_loss, elapsed_time))
avg_losses_f.append(avg_loss)
 avg_val_losses_f.append(avg_val_loss)
 for i,(x_batch,)in enumerate(test_loader):
if feats:
f = test_features[i * batch_size:(i+1)* batch_size]
y_pred = model([x_batch,f] ).detach()
else:
y_pred = model(x_batch ).detach()
test_preds_fold[i * batch_size:(i+1)* batch_size] = sigmoid(y_pred.cpu().numpy())[:, 0]
train_preds[valid_idx] = valid_preds_fold
test_preds += test_preds_fold / len(splits)
 print('All \t loss={:.4f} \t val_loss={:.4f} \t '.format(np.average(avg_losses_f),np.average(avg_val_losses_f)))
 return train_preds, test_preds
def get_callbacks(filepath, patience=2):
es = EarlyStopping('val_loss', patience=patience, mode="min")
 msave = ModelCheckpoint(filepath, save_best_only=True)
 return [es, msave]
def get_model() :
embed_dim = 30
dropout_rate = 0.9
emb_dropout_rate = 0.9
input_text = Input(shape=[maxlen], name="stem_input")
 input_num = Input(shape=[X_train["num_input"].shape[1]], name="num_input")
 input_svd = Input(shape=[X_train["svd_vect"].shape[1]], name="svd_vect")
 emb_lstm = SpatialDropout1D(emb_dropout_rate )(Embedding(n_stem_seq, embed_dim
,input_length = maxlen
)(input_text))
concatenate = Concatenate()([(Flatten()(emb_lstm)) , input_num, input_svd])
 dense = Dropout(dropout_rate )(Dense(256 )(concatenate))
output = Dense(3, activation="softmax" )(dense)
 model = Model([input_text, input_num, input_svd], output)
 optimizer = Adam(lr=0.001, beta_1=0.9, beta_2=0.999, epsilon=1e-08, decay=0.0)
 model.compile(loss="categorical_crossentropy", optimizer=optimizer, metrics=["accuracy"])
 return model
model = get_model()
model.summary()<train_model>
class Alex_NeuralNet_Meta(nn.Module):
def __init__(self,hidden_size,lin_size, embedding_matrix=embedding_matrix):
super(Alex_NeuralNet_Meta, self ).__init__()
self.hidden_size = hidden_size
drp = 0.1
self.embedding = nn.Embedding(max_features, embed_size)
 self.embedding.weight = nn.Parameter(torch.tensor(embedding_matrix, dtype=torch.float32))
self.embedding.weight.requires_grad = False
self.embedding_dropout = nn.Dropout2d(0.1)
 self.lstm = nn.LSTM(embed_size, hidden_size, bidirectional=True, batch_first=True)
 for name, param in self.lstm.named_parameters() :
if 'bias' in name:
nn.init.constant_(param, 0.0)
 elif 'weight_ih' in name:
nn.init.kaiming_normal_(param)
 elif 'weight_hh' in name:
nn.init.orthogonal_(param)
 self.gru = nn.GRU(hidden_size*2, hidden_size, bidirectional=True, batch_first=True)
 for name, param in self.gru.named_parameters() :
if 'bias' in name:
nn.init.constant_(param, 0.0)
 elif 'weight_ih' in name:
nn.init.kaiming_normal_(param)
 elif 'weight_hh' in name:
nn.init.orthogonal_(param)
 self.linear = nn.Linear(hidden_size*6 + features.shape[1], lin_size)
 self.relu = nn.ReLU()
self.dropout = nn.Dropout(drp)
 self.out = nn.Linear(lin_size, 1)
 def forward(self, x):

 h_embedding = self.embedding(x[0])
 embeddings = h_embedding.unsqueeze(2)
 embeddings = embeddings.permute(0, 3, 2, 1)
 embeddings = self.embedding_dropout(embeddings)
 embeddings = embeddings.permute(0, 3, 2, 1)
 h_embedding = embeddings.squeeze(2)
 h_lstm, _ = self.lstm(h_embedding)
 h_gru, hh_gru = self.gru(h_lstm)
 hh_gru = hh_gru.view(-1, 2*self.hidden_size)
 avg_pool = torch.mean(h_gru, 1)
 max_pool, _ = torch.max(h_gru, 1)
 f = torch.tensor(x[1], dtype=torch.float ).cuda()
conc = torch.cat(( hh_gru, avg_pool, max_pool,f), 1)
 conc = self.relu(self.linear(conc))
conc = self.dropout(conc)
 out = self.out(conc)
 return out
file_path = ".model_weights.hdf5"
callbacks = get_callbacks(filepath=file_path, patience=5)
 model = get_model()
model.fit(X_train, y_train, epochs=150
, validation_data=[X_valid, y_valid]
, batch_size=512
, callbacks = callbacks )<predict_on_test>
def sigmoid(x):
return 1 /(1 + np.exp(-x))
seed_everything()
x_test_cuda = torch.tensor(x_test, dtype=torch.long ).cuda()
test = torch.utils.data.TensorDataset(x_test_cuda)
 test_loader = torch.utils.data.DataLoader(test, batch_size=batch_size, shuffle=False )
model = get_model()
model.load_weights(file_path)
 preds_train = model.predict(X_train)
 preds_valid = model.predict(X_valid)
 print(log_loss(y_train, preds_train))
print(log_loss(y_valid, preds_valid))<save_to_csv>
train_preds , test_preds = pytorch_model_run_cv(x_train,y_train,features,x_test,Alex_NeuralNet_Meta(70,16, embedding_matrix=embedding_matrix), feats = True )
preds = pd.DataFrame(model.predict(X_test), columns=target_vars)
 submission = pd.concat([test["id"],preds], 1)
 submission.to_csv("./submission.csv", index=False)
 submission.head()<import_modules>
def bestThresshold(y_train,train_preds):
tmp = [0,0,0]
delta = 0
for tmp[0] in tqdm(np.arange(0.1, 0.501, 0.01)) :
tmp[1] = f1_score(y_train, np.array(train_preds)>tmp[0])
 if tmp[1] > tmp[2]:
delta = tmp[0]
tmp[2] = tmp[1]
print('best threshold is {:.4f} with F1 score: {:.4f}'.format(delta, tmp[2]))
return delta , tmp[2]
delta, _ = bestThresshold(y_train,train_preds )
<load_from_csv><EOS> 
if debug:
df_test = pd.read_csv(".. /input/test.csv")[:20000]
else:
df_test = pd.read_csv(".. /input/test.csv")
 submission = df_test[['qid']].copy()
submission['prediction'] =(test_preds > delta ).astype(int)
 submission.to_csv('submission.csv', index=False )