Kaggle competition: Tweet Sentiment Extraction
<SOS> metric: Jaccard Kaggle data source: tweet-sentiment-extraction<prepare_x_and_y>
import os
import torch
import pandas as pd
import torch.nn as nn
import numpy as np
import torch.nn.functional as F
from torch.optim import lr_scheduler
from sklearn import model_selection
from sklearn import metrics
import transformers
import tokenizers
from transformers import AdamW
from transformers import get_linear_schedule_with_warmup
from tqdm.autonotebook import tqdm
import utils
MIN_TEST_DATE = df_Test.Date.min()
df_train = df_Train.loc[df_Train.Date < MIN_TEST_DATE, :]
y1_Train = df_train.iloc[:, -2]
y2_Train = df_train.iloc[:, -1]<feature_engineering>
class config:
MAX_LEN = 128
TRAIN_BATCH_SIZE = 64
VALID_BATCH_SIZE = 16
EPOCHS = 5
BERT_PATH = ".. /input/bert-base-uncased/"
MODEL_PATH = "model.bin"
TRAINING_FILE = ".. /input/tweet-train-folds/train_folds.csv"
TOKENIZER = tokenizers.BertWordPieceTokenizer(
 f"{BERT_PATH}/vocab.txt",
lowercase=True
)
def extractDate(df, colName = 'Date'):

 assert colName in df.columns
df = df.assign(
 week = df.loc[:, colName].dt.week,
month = df.loc[:, colName].dt.month,
day = df.loc[:, colName].dt.day,
dayofweek = df.loc[:, colName].dt.dayofweek,
dayofyear = df.loc[:, colName].dt.dayofyear, 
)
 return df<data_type_conversions>
def process_data(tweet, selected_text, sentiment, tokenizer, max_len):

 len_st = len(selected_text)
 idx0 = None
idx1 = None
for ind in(i for i, e in enumerate(tweet)if e == selected_text[0]):
if tweet[ind: ind+len_st] == selected_text:
idx0 = ind
idx1 = ind + len_st - 1
break
char_targets = [0] * len(tweet)
 if idx0 != None and idx1 != None:
for ct in range(idx0, idx1 + 1):
char_targets[ct] = 1
tok_tweet = tokenizer.encode(tweet)
 input_ids_orig = tok_tweet.ids[1:-1]
tweet_offsets = tok_tweet.offsets[1:-1]
target_idx = []
for j,(offset1, offset2)in enumerate(tweet_offsets):
if sum(char_targets[offset1: offset2])> 0:
target_idx.append(j)
 targets_start = target_idx[0]
targets_end = target_idx[-1]
sentiment_id = {
'positive': 3893,
'negative': 4997,
'neutral': 8699
}
input_ids = [101] + [sentiment_id[sentiment]] + [102] + input_ids_orig + [102]
token_type_ids = [0, 0, 0] + [1] *(len(input_ids_orig)+ 1)
 mask = [1] * len(token_type_ids)
 tweet_offsets = [(0, 0)] * 3 + tweet_offsets + [(0, 0)]
targets_start += 3
targets_end += 3
padding_length = max_len - len(input_ids)
 if padding_length > 0:
input_ids = input_ids +([0] * padding_length)
 mask = mask +([0] * padding_length)
 token_type_ids = token_type_ids +([0] * padding_length)
 tweet_offsets = tweet_offsets +([(0, 0)] * padding_length)
 return {
'ids': input_ids,
'mask': mask,
'token_type_ids': token_type_ids,
'targets_start': targets_start,
'targets_end': targets_end,
'orig_tweet': tweet,
'orig_selected': selected_text,
'sentiment': sentiment,
'offsets': tweet_offsets
}
def createNewDataset(df):

 df_New = df.copy()
df_New.loc[:, 'Date_Int'] =(df_New.loc[:, 'Date'].dt.strftime("%m%d")).astype('int16')
 df_New.drop(columns=['Date'], axis=1, inplace=True)
 return df_New<create_dataframe>
class TweetDataset:

 def __init__(self, tweet, sentiment, selected_text):
self.tweet = tweet
self.sentiment = sentiment
self.selected_text = selected_text
self.tokenizer = config.TOKENIZER
self.max_len = config.MAX_LEN
def __len__(self):
return len(self.tweet)
 def __getitem__(self, item):
data = process_data(
 self.tweet[item],
self.selected_text[item],
self.sentiment[item],
self.tokenizer,
self.max_len 
)
 return {
'ids': torch.tensor(data["ids"], dtype=torch.long),
'mask': torch.tensor(data["mask"], dtype=torch.long),
'token_type_ids': torch.tensor(data["token_type_ids"], dtype=torch.long),
'targets_start': torch.tensor(data["targets_start"], dtype=torch.long),
'targets_end': torch.tensor(data["targets_end"], dtype=torch.long),
'orig_tweet': data["orig_tweet"],
'orig_selected': data["orig_selected"],
'sentiment': data["sentiment"],
'offsets': torch.tensor(data["offsets"], dtype=torch.long)
 }
X_Train = createNewDataset(df_train)
 X_Test = createNewDataset(df_Test )<categorify>
class TweetModel(transformers.BertPreTrainedModel):

 def __init__(self, conf):
super(TweetModel, self ).__init__(conf)
 self.bert = transformers.BertModel.from_pretrained(config.BERT_PATH, config=conf)
 self.drop_out = nn.Dropout(0.1)
 self.l0 = nn.Linear(768 * 2, 2)
 torch.nn.init.normal_(self.l0.weight, std=0.02)
 def forward(self, ids, mask, token_type_ids):
_, _, out = self.bert(
 ids,
attention_mask=mask,
token_type_ids=token_type_ids 
)
 out = torch.cat(( out[-1], out[-2]), dim=-1)
 out = self.drop_out(out)
 logits = self.l0(out)
 start_logits, end_logits = logits.split(1, dim=-1)
 start_logits = start_logits.squeeze(-1)
 end_logits = end_logits.squeeze(-1)
 return start_logits, end_logits
days_change = [1, 2, 3, 5, 7, 10]
def getChangeGrowth(df):
newCCols = []
newGCols = []
for day in days_change:
newCCol = f'C_{day}'
df['C'+newCCol] = df['LConfirmedCases'] - df[f'CD_{day}']
df['F'+newCCol] = df['LFatalities'] - df[f'FD_{day}']
newCCols.append(newCCol)
 newGCol = f'G_{day}'
df['C'+newGCol] = df['C'+newCCol] / df[f'CD_{day}']
df['F'+newGCol] = df['F'+newCCol] / df[f'FD_{day}']
newGCols.append(newGCol)
 df.fillna(0, inplace=True)
 return df<feature_engineering>
def loss_fn(start_logits, end_logits, start_positions, end_positions):

 loss_fct = nn.CrossEntropyLoss()
start_loss = loss_fct(start_logits, start_positions)
 end_loss = loss_fct(end_logits, end_positions)
 total_loss =(start_loss + end_loss)
 return total_loss
windows = [1, 2, 3, 5, 7]
def getMA(df):
newCMACols = []
newGMACols = []
for window in windows:
for day in days_change:
newCMACol = f'CMA_{day}_{window}'
df['C'+newCMACol] = df[f'CC_{day}'].rolling(window ).mean()
df['F'+newCMACol] = df[f'FC_{day}'].rolling(window ).mean()
newCMACols.append(newCMACol)
 newGMACol = f'GMA_{day}_{window}'
df['C'+newGMACol] = df[f'CG_{day}'].rolling(window ).mean()
df['F'+newGMACol] = df[f'FG_{day}'].rolling(window ).mean()
newGMACols.append(newGMACol)
 df.fillna(0, inplace=True)
 return df<groupby>
def train_fn(data_loader, model, optimizer, device, scheduler=None):

 model.train()
losses = utils.AverageMeter()
jaccards = utils.AverageMeter()
tk0 = tqdm(data_loader, total=len(data_loader))
for bi, d in enumerate(tk0):
ids = d["ids"]
token_type_ids = d["token_type_ids"]
mask = d["mask"]
targets_start = d["targets_start"]
targets_end = d["targets_end"]
sentiment = d["sentiment"]
orig_selected = d["orig_selected"]
orig_tweet = d["orig_tweet"]
offsets = d["offsets"]
ids = ids.to(device, dtype=torch.long)
 token_type_ids = token_type_ids.to(device, dtype=torch.long)
 mask = mask.to(device, dtype=torch.long)
 targets_start = targets_start.to(device, dtype=torch.long)
 targets_end = targets_end.to(device, dtype=torch.long)
 model.zero_grad()
outputs_start, outputs_end = model(
 ids=ids,
mask=mask,
token_type_ids=token_type_ids, 
)
 loss = loss_fn(outputs_start, outputs_end, targets_start, targets_end)
 loss.backward()
optimizer.step()
scheduler.step()
outputs_start = torch.softmax(outputs_start, dim=1 ).cpu().detach().numpy()
outputs_end = torch.softmax(outputs_end, dim=1 ).cpu().detach().numpy()
jaccard_scores = []
for px, tweet in enumerate(orig_tweet):
selected_tweet = orig_selected[px]
tweet_sentiment = sentiment[px]
jaccard_score, _ = calculate_jaccard_score(
 original_tweet=tweet,
target_string=selected_tweet,
sentiment_val=tweet_sentiment,
idx_start=np.argmax(outputs_start[px, :]),
idx_end=np.argmax(outputs_end[px, :]),
offsets=offsets[px] 
)
 jaccard_scores.append(jaccard_score)
 jaccards.update(np.mean(jaccard_scores), ids.size(0))
losses.update(loss.item() , ids.size(0))
tk0.set_postfix(loss=losses.avg, jaccard=jaccards.avg )
cases = [1, 50, 100, 500, 1000, 5000, 35000, 75000, 100000]
def getCDSC(df):
newCDSCCols = []
for case in cases:
newDSCCol = f'{case}_CDSC'
df.loc[df.CD_1 == 0, newDSCCol] = 0
df.loc[df.CD_1 >= case, newDSCCol] = df[df.CD_1 >= case].groupby(['Country', 'State'] ).cumcount()
newCDSCCols.append(newDSCCol)
 df.fillna(0, inplace=True)
 return df<groupby>
def calculate_jaccard_score(
 original_tweet,
target_string,
sentiment_val,
idx_start,
idx_end,
offsets,
verbose=False):

 if idx_end < idx_start:
idx_end = idx_start
filtered_output = ""
for ix in range(idx_start, idx_end + 1):
filtered_output += original_tweet[offsets[ix][0]: offsets[ix][1]]
if(ix+1)< len(offsets)and offsets[ix][1] < offsets[ix+1][0]:
filtered_output += " "
if sentiment_val == "neutral" or len(original_tweet.split())< 2:
filtered_output = original_tweet
jac = utils.jaccard(target_string.strip() , filtered_output.strip())
 return jac, filtered_output
def eval_fn(data_loader, model, device):

 model.eval()
losses = utils.AverageMeter()
jaccards = utils.AverageMeter()
with torch.no_grad() :
tk0 = tqdm(data_loader, total=len(data_loader))
for bi, d in enumerate(tk0):
ids = d["ids"]
token_type_ids = d["token_type_ids"]
mask = d["mask"]
sentiment = d["sentiment"]
orig_selected = d["orig_selected"]
orig_tweet = d["orig_tweet"]
targets_start = d["targets_start"]
targets_end = d["targets_end"]
offsets = d["offsets"].numpy()
ids = ids.to(device, dtype=torch.long)
 token_type_ids = token_type_ids.to(device, dtype=torch.long)
 mask = mask.to(device, dtype=torch.long)
 targets_start = targets_start.to(device, dtype=torch.long)
 targets_end = targets_end.to(device, dtype=torch.long)
 outputs_start, outputs_end = model(
 ids=ids,
mask=mask,
token_type_ids=token_type_ids 
)
 loss = loss_fn(outputs_start, outputs_end, targets_start, targets_end)
 outputs_start = torch.softmax(outputs_start, dim=1 ).cpu().detach().numpy()
outputs_end = torch.softmax(outputs_end, dim=1 ).cpu().detach().numpy()
jaccard_scores = []
for px, tweet in enumerate(orig_tweet):
selected_tweet = orig_selected[px]
tweet_sentiment = sentiment[px]
jaccard_score, _ = calculate_jaccard_score(
 original_tweet=tweet,
target_string=selected_tweet,
sentiment_val=tweet_sentiment,
idx_start=np.argmax(outputs_start[px, :]),
idx_end=np.argmax(outputs_end[px, :]),
offsets=offsets[px] 
)
 jaccard_scores.append(jaccard_score)
 jaccards.update(np.mean(jaccard_scores), ids.size(0))
losses.update(loss.item() , ids.size(0))
tk0.set_postfix(loss=losses.avg, jaccard=jaccards.avg)
 print(f"Jaccard = {jaccards.avg}")
 return jaccards.avg
deaths = [1, 50, 100, 500, 1000, 5000, 35000]
def getFDSC(df):
newFDSCCols = []
for death in deaths:
newDSCCol = f'{death}_FDSC'
df.loc[df.FD_1 == 0, newDSCCol] = 0
df.loc[df.FD_1 >= death, newDSCCol] = df[df.FD_1 >= death].groupby(['Country', 'State'] ).cumcount()
newFDSCCols.append(newDSCCol)
 df.fillna(0, inplace=True)
 return df<concatenate>
def run(fold):

 dfx = pd.read_csv(config.TRAINING_FILE)
 df_train = dfx[dfx.kfold != fold].reset_index(drop=True)
 df_valid = dfx[dfx.kfold == fold].reset_index(drop=True)
 train_dataset = TweetDataset(
 tweet=df_train.text.values,
sentiment=df_train.sentiment.values,
selected_text=df_train.selected_text.values 
)
 train_data_loader = torch.utils.data.DataLoader(
 train_dataset,
batch_size=config.TRAIN_BATCH_SIZE,
num_workers=4 
)
 valid_dataset = TweetDataset(
 tweet=df_valid.text.values,
sentiment=df_valid.sentiment.values,
selected_text=df_valid.selected_text.values 
)
 valid_data_loader = torch.utils.data.DataLoader(
 valid_dataset,
batch_size=config.VALID_BATCH_SIZE,
num_workers=2 
)
 device = torch.device("cuda")
 model_config = transformers.BertConfig.from_pretrained(config.BERT_PATH)
 model_config.output_hidden_states = True
model = TweetModel(conf=model_config)
 model.to(device)
 num_train_steps = int(len(df_train)/ config.TRAIN_BATCH_SIZE * config.EPOCHS)
 param_optimizer = list(model.named_parameters())
 no_decay = ["bias", "LayerNorm.bias", "LayerNorm.weight"]
optimizer_parameters = [
{'params': [p for n, p in param_optimizer if not any(nd in n for nd in no_decay)], 'weight_decay': 0.001},
{'params': [p for n, p in param_optimizer if any(nd in n for nd in no_decay)], 'weight_decay': 0.0},
]
optimizer = AdamW(optimizer_parameters, lr=3e-5)
 scheduler = get_linear_schedule_with_warmup(
 optimizer,
num_warmup_steps=0,
num_training_steps=num_train_steps 
)
 es = utils.EarlyStopping(patience=2, mode="max")
 print(f"Training is Starting for fold={fold}")
 for epoch in range(3):
train_fn(train_data_loader, model, optimizer, device, scheduler=scheduler)
 jaccard = eval_fn(valid_data_loader, model, device)
 print(f"Jaccard Score = {jaccard}")
 es(jaccard, model, model_path=f"model_{fold}.bin")
 if es.early_stop:
print("Early stopping")
 break
df = pd.concat([df_Train, df_Test[df_Test.Date > df_Train.Date.max() ]], axis=0, sort=False, ignore_index=True )<feature_engineering>
df_test = pd.read_csv(".. /input/tweet-sentiment-extraction/test.csv")
 df_test.loc[:, "selected_text"] = df_test.text.values
df['LConfirmedCases'] = np.log1p(df['ConfirmedCases'])
 df['LFatalities'] = np.log1p(df['Fatalities'] )<feature_engineering>
device = torch.device("cuda")
 model_config = transformers.BertConfig.from_pretrained(config.BERT_PATH)
 model_config.output_hidden_states = True
df.loc[(df.Date >= df_Test.Date.min())&(df.Date <= df_Train.Date.max()), 'ForecastId'] = df_Test.loc[(df_Test.Date >= df_Test.Date.min())&(df_Test.Date <= df_Train.Date.max()), 'ForecastId'].values<statistical_test>
model1 = TweetModel(conf=model_config)
 model1.to(device)
 model1.load_state_dict(torch.load("model_0.bin"))
model1.eval()
model2 = TweetModel(conf=model_config)
 model2.to(device)
 model2.load_state_dict(torch.load("model_1.bin"))
model2.eval()
model3 = TweetModel(conf=model_config)
 model3.to(device)
 model3.load_state_dict(torch.load("model_2.bin"))
model3.eval()
model4 = TweetModel(conf=model_config)
 model4.to(device)
 model4.load_state_dict(torch.load("model_3.bin"))
model4.eval()
model5 = TweetModel(conf=model_config)
 model5.to(device)
 model5.load_state_dict(torch.load("model_4.bin"))
model5.eval()
df = getDaysShift(df)
 df = getChangeGrowth(df)
 df = getMA(df)
 df = getCDSC(df)
 df = getFDSC(df )<groupby>
final_output = []
test_dataset = TweetDataset(
 tweet=df_test.text.values,
sentiment=df_test.sentiment.values,
selected_text=df_test.selected_text.values 
)
 data_loader = torch.utils.data.DataLoader(
 test_dataset,
shuffle=False,
batch_size=config.VALID_BATCH_SIZE,
num_workers=1 
)
 with torch.no_grad() :
tk0 = tqdm(data_loader, total=len(data_loader))
for bi, d in enumerate(tk0):
ids = d["ids"]
token_type_ids = d["token_type_ids"]
mask = d["mask"]
sentiment = d["sentiment"]
orig_selected = d["orig_selected"]
orig_tweet = d["orig_tweet"]
targets_start = d["targets_start"]
targets_end = d["targets_end"]
offsets = d["offsets"].numpy()
ids = ids.to(device, dtype=torch.long)
 token_type_ids = token_type_ids.to(device, dtype=torch.long)
 mask = mask.to(device, dtype=torch.long)
 targets_start = targets_start.to(device, dtype=torch.long)
 targets_end = targets_end.to(device, dtype=torch.long)
 outputs_start1, outputs_end1 = model1(
 ids=ids,
mask=mask,
token_type_ids=token_type_ids 
)
 outputs_start2, outputs_end2 = model2(
 ids=ids,
mask=mask,
token_type_ids=token_type_ids 
)
 outputs_start3, outputs_end3 = model3(
 ids=ids,
mask=mask,
token_type_ids=token_type_ids 
)
 outputs_start4, outputs_end4 = model4(
 ids=ids,
mask=mask,
token_type_ids=token_type_ids 
)
 outputs_start5, outputs_end5 = model5(
 ids=ids,
mask=mask,
token_type_ids=token_type_ids 
)
 outputs_start =(
 outputs_start1
+ outputs_start2
+ outputs_start3
+ outputs_start4
+ outputs_start5 
)/ 5
outputs_end =(
 outputs_end1
+ outputs_end2
+ outputs_end3
+ outputs_end4
+ outputs_end5 
)/ 5
outputs_start = torch.softmax(outputs_start, dim=1 ).cpu().detach().numpy()
outputs_end = torch.softmax(outputs_end, dim=1 ).cpu().detach().numpy()
for px, tweet in enumerate(orig_tweet):
selected_tweet = orig_selected[px]
tweet_sentiment = sentiment[px]
_, output_sentence = calculate_jaccard_score(
 original_tweet=tweet,
target_string=selected_tweet,
sentiment_val=tweet_sentiment,
idx_start=np.argmax(outputs_start[px, :]),
idx_end=np.argmax(outputs_end[px, :]),
offsets=offsets[px] 
)
 final_output.append(output_sentence )
df['CSId'] = df.groupby(['Country', 'State'] ).cumcount()<count_unique_values>
def post_process(selected):
return " ".join(set(selected.lower().split()))
<filter><EOS> 
sample = pd.read_csv(".. /input/tweet-sentiment-extraction/sample_submission.csv")
 sample.loc[:, 'selected_text'] = final_output
sample.selected_text = sample.selected_text.map(post_process)
 sample.to_csv("submission.csv", index=False )