107 lines
3.3 KiB
Python
107 lines
3.3 KiB
Python
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import csv
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import pandas as pd
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import regex as re
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import nltk
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import tqdm
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from nltk import trigrams, word_tokenize
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from collections import Counter, defaultdict
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import string
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nltk.download("punkt")
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most_common_en_word = "the:0.4 be:0.2 to:0.1 of:0.05 and:0.025 a:0.0125 :0.2125"
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train_count = 125000
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# train set
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train_data = pd.read_csv("train/in.tsv.xz", sep="\t", on_bad_lines='skip', header=None, quoting=csv.QUOTE_NONE, nrows=train_count)
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# training labels
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train_labels = pd.read_csv("train/expected.tsv", sep="\t", on_bad_lines='skip', header=None, quoting=csv.QUOTE_NONE,nrows=train_count)
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dev_data = pd.read_csv("dev-0/in.tsv.xz", sep="\t", on_bad_lines='skip', header=None, quoting=csv.QUOTE_NONE)
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test_data = pd.read_csv("test-A/in.tsv.xz", sep="\t", on_bad_lines='skip', header=None, quoting=csv.QUOTE_NONE)
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def prepare_text(text):
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text = text.lower().replace("-\\n", "").replace("\\n", " ")
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text = re.sub(r"\p{P}", "", text)
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return text
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def train_trigrams():
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for _, row in tqdm.tqdm(train_data.iterrows()):
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text = prepare_text(str(row["final"]))
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words = word_tokenize(text)
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for w1, w2, w3 in trigrams(words, pad_right=True, pad_left=True):
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if all([w1, w2, w3]):
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model[(w2, w3)][w1] += 1
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model[(w1, w2)][w3] += 1
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for w_pair in model:
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ngram_count = float(sum(model[w_pair].values()))
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for w3 in model[w_pair]:
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model[w_pair][w3] /= ngram_count
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def predict_probs(word1, word2):
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raw_prediction = dict(model[word1, word2])
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prediction = dict(Counter(raw_prediction).most_common(6))
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total_prob = 0.0
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str_prediction = ""
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for word, prob in prediction.items():
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total_prob += prob
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str_prediction += f"{word}:{prob} "
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if total_prob == 0.0:
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return most_common_en_word
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remaining_prob = 1 - total_prob
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if remaining_prob < 0.01:
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remaining_prob = 0.01
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str_prediction += f":{remaining_prob}"
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return str_prediction
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def write_output():
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with open("dev-0/out.tsv", "w") as file:
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for _, row in dev_data.iterrows():
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text = prepare_text(str(row[7]))
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words = word_tokenize(text)
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if len(words) < 3:
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prediction = most_common_en_word
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else:
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prediction = predict_probs(words[0], words[1])
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file.write(prediction + "\n")
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with open("test-A/out.tsv", "w") as file:
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for _, row in test_data.iterrows():
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text = prepare_text(str(row[7]))
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words = word_tokenize(text)
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if len(words) < 3:
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prediction = most_common_en_word
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else:
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prediction = predict_probs(words[0], words[1])
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file.write(prediction + "\n")
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if __name__ == "__main__":
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# Preapare train data
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print("Preparing data...")
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train_data = train_data[[6, 7]]
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train_data = pd.concat([train_data, train_labels], axis=1)
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train_data["final"] = train_data[6] + train_data[0] + train_data[7]
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# declare model
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print("Preparing model...")
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model = defaultdict(lambda: defaultdict(lambda: 0))
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# train model
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print("Model training...")
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train_trigrams()
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# write outputs
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print("Writing outputs...")
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write_output()
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