From e45b0118bd07d3ae36bdaf226d0b70bb2a12bd94 Mon Sep 17 00:00:00 2001
From: SzamanFL <karolgrzyski@gmail.com>
Date: Sun, 24 Jan 2021 00:14:40 +0100
Subject: [PATCH] Add preddict

---
 src/predict.py | 108 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 src/predict.py

diff --git a/src/predict.py b/src/predict.py
new file mode 100644
index 0000000..3c4a1d1
--- /dev/null
+++ b/src/predict.py
@@ -0,0 +1,108 @@
+#!/usr/bin/env python3
+
+import argparse
+import torch
+import pickle
+import unicodedata
+import re
+
+from Decoder import Decoder
+from Encoder import Encoder
+
+device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
+SOS=0
+EOS=1
+MAX_LENGTH=25
+
+def clear_line(string):
+    string = ''.join(
+        c for c in unicodedata.normalize('NFD', string)
+        if unicodedata.category(c) != 'Mn'
+    )
+    string = re.sub("[^a-z ]", "", string.lower())
+    return string
+
+def read_clear_data(in_file_path):
+    print("Reading data...")
+    data = []
+    with open(in_file_path) as in_file:
+        for line in in_file:
+            string = clear_line(line)
+            if len(string.split(' ')) < MAX_LENGTH:
+                data.append(string)
+            else:
+                data.append("To bedzie zle")
+    return data
+
+def indexes_from_sentence(vocab, sentence):
+    a = []
+    for word in sentence.split(' '):
+        try:
+            index = vocab.word2index[word]
+            a.append(index)
+        except:
+            a.append(vocab.word2index['jest'])
+    return a
+    #return [vocab.word2index[word] for word in sentence.split(' ')]
+
+def tensor_from_sentece(vocab, sentence):
+    indexes = indexes_from_sentence(vocab, sentence)
+    indexes.append(EOS)
+    return torch.tensor(indexes, dtype=torch.long, device=device).view(-1,1)
+
+def eval(encoder, decoder, sentence, input_vocab, target_vocab, max_length=MAX_LENGTH):
+    with torch.no_grad():
+        input_tensor = tensor_from_sentece(input_vocab, sentence)
+        input_length = input_tensor.size()[0]
+
+        encoder_hidden = encoder.init_hidden(device)
+
+        encoder_outputs = torch.zeros(max_length, encoder.hidden_size, device=device)
+
+        for i in range(input_length):
+            encoder_output, encoder_hidden = encoder(input_tensor[i], encoder_hidden)
+            encoder_outputs[i] += encoder_output[0, 0]
+
+        decoder_input = torch.tensor([[SOS]], device=device)
+
+        decoder_hidden = encoder_hidden
+        decoder_words = []
+        
+        for i in range(max_length):
+            decoder_output, decoder_hidden = decoder(decoder_input, decoder_hidden)
+            topv, topi = decoder_output.data.topk(1)
+            if topi.item() == EOS:
+                decoder_words.append('<EOS>')
+                break
+            else:
+                decoder_words.append(target_vocab.index2word[topi.item()])
+            decoder_input = topi.squeeze().detach()
+        return decoder_words
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--in_f')
+    parser.add_argument('--out_f')
+    parser.add_argument('--vocab')
+    parser.add_argument('--encoder')
+    parser.add_argument('--decoder')
+    args = parser.parse_args()
+
+    with open(args.vocab, 'rb') as p:
+        pairs, input_vocab, target_vocab = pickle.load(p)
+
+    hidden_size = 256
+    encoder = Encoder(input_vocab.size, hidden_size).to(device)
+    decoder = Decoder(hidden_size,target_vocab.size).to(device)
+
+    encoder.load_state_dict(torch.load(args.encoder))
+    decoder.load_state_dict(torch.load(args.decoder))
+
+    data = read_clear_data(args.in_f)
+    with open(args.out_f, 'w+') as f:
+        for line in data:
+            out = eval(encoder, decoder, line, input_vocab, target_vocab, max_length=MAX_LENGTH)
+            f.write(" ".join(out) + "\n")
+
+main()