用注意力机制实现中英文互译

野性酷女 2022-08-30 11:58 200阅读 0赞

### 用注意力机制实现中英文互译 ###

\[KEY: > input, = target, < output\]

> il est en train de peindre un tableau .  
> = he is painting a picture .  
> < he is painting a picture .

> pourquoi ne pas essayer ce vin delicieux ?  
> = why not try that delicious wine ?  
> < why not try that delicious wine ?

> elle n est pas poete mais romanciere .  
> = she is not a poet but a novelist .  
> < she not not a poet but a novelist .

### 导入需要的模块及数据 ###

from __future__ import unicode_literals, print_function, division
    from io import open
    import unicodedata
    import string
    import re
    import random
    import jieba
    import torch
    import torch.nn as nn
    from torch import optim
    import torch.nn.functional as F
    
    import matplotlib.font_manager as fm
    myfont = fm.FontProperties(fname='/Users/maqi/opt/anaconda3/lib/python3.8/site-packages/matplotlib/mpl-data/fonts/ttf/DejaVuSans.ttf')
    
    device = torch.device("cuda" if torch.cuda.is_available() else "cpu")

### 预处理数据 ###

SOS_token = 0
    EOS_token = 1
    
    
    class Lang:
        def __init__(self, name):
            self.name = name
            self.word2index = { }
            self.word2count = { }
            self.index2word = { 0: "SOS", 1: "EOS"}
            self.n_words = 2  # Count SOS and EOS
    
        def addSentence(self, sentence):
            for word in sentence.split(' '):
                self.addWord(word)
        def addSentence_cn(self, sentence):
            for word in list(jieba.cut(sentence)):
                self.addWord(word)
    
        def addWord(self, word):
            if word not in self.word2index:
                self.word2index[word] = self.n_words
                self.word2count[word] = 1
                self.index2word[self.n_words] = word
                self.n_words += 1
            else:
                self.word2count[word] += 1

# 为便于数据处理，把Unicode字符串转换为ASCII编码
    
    def unicodeToAscii(s):
        return ''.join(
            c for c in unicodedata.normalize('NFD', s)
            if unicodedata.category(c) != 'Mn'
        )
    
    # 对英文转换为小写，去空格及非字母符号等处理
    
    def normalizeString(s):
        s = unicodeToAscii(s.lower().strip())
        s = re.sub(r"([.!?])", r" \1", s)
        #s = re.sub(r"[^a-zA-Z.!?]+", r" ", s)
        return s

def readLangs(lang1, lang2, reverse=False):
        print("Reading lines...")
    
        # 读文件，然后分成行
        lines = open('eng-cmn/%s-%s.txt' % (lang1, lang2), encoding='utf-8').\
            read().strip().split('\n')
    
        # 把行分成语句对，并进行规范化
        pairs = [[normalizeString(s) for s in l.split('\t')] for l in lines]
    
        # 判断是否需要转换语句对的次序，如[英文，中文]转换为[中文，英文]次序
        if reverse:
            pairs = [list(reversed(p)) for p in pairs]
            input_lang = Lang(lang2)
            output_lang = Lang(lang1)
        else:
            input_lang = Lang(lang1)
            output_lang = Lang(lang2)
    
        return input_lang, output_lang, pairs

#为便于训练，这里选择部分数据
    MAX_LENGTH = 20
    
    eng_prefixes = (
        "i am ", "i m ",
        "he is", "he s ",
        "she is", "she s ",
        "you are", "you re ",
        "we are", "we re ",
        "they are", "they re "
    )
    
    
    def filterPair(p):
        return len(p[0].split(' ')) < MAX_LENGTH and \
            len(p[1].split(' ')) < MAX_LENGTH and \
            p[1].startswith(eng_prefixes)
    
    
    def filterPairs(pairs):
        return [pair for pair in pairs if filterPair(pair)]

def prepareData(lang1, lang2, reverse=False):
        input_lang, output_lang, pairs = readLangs(lang1, lang2, reverse)
        print("Read %s sentence pairs" % len(pairs))
        pairs = filterPairs(pairs)
        print("Trimmed to %s sentence pairs" % len(pairs))
        print("Counting words...")
        for pair in pairs:
            input_lang.addSentence_cn(pair[0])
            output_lang.addSentence(pair[1])
        print("Counted words:")
        print(input_lang.name, input_lang.n_words)
        print(output_lang.name, output_lang.n_words)
        return input_lang, output_lang, pairs

input_lang, output_lang, pairs = prepareData('eng', 'cmn',True)
    print(random.choice(pairs))

Reading lines...
    
    
    Building prefix dict from the default dictionary ...Loading model from cache /var/folders/7t/wvjcfn5575g892qb2nqbd9kw0000gn/T/jieba.cache
    
    
    Read 21007 sentence pairsTrimmed to 640 sentence pairsCounting words...
    
    
    Loading model cost 0.571 seconds.Prefix dict has been built succesfully.
    
    
    Counted words:cmn 1063eng 808['他很穷。', 'he is poor .']

pairs[:3]

[['我冷。', 'i am cold .'], ['我沒事。', 'i am okay .'], ['我生病了。', 'i am sick .']]

### 构建模型 ###

class EncoderRNN(nn.Module):    def __init__(self, input_size, hidden_size):        super(EncoderRNN, self).__init__()        self.hidden_size = hidden_size        self.embedding = nn.Embedding(input_size, hidden_size)        self.gru = nn.GRU(hidden_size, hidden_size)    def forward(self, input, hidden):        embedded = self.embedding(input).view(1, 1, -1)        output = embedded        output, hidden = self.gru(output, hidden)        return output, hidden    def initHidden(self):        return torch.zeros(1, 1, self.hidden_size, device=device)

class DecoderRNN(nn.Module):    def __init__(self, hidden_size, output_size):        super(DecoderRNN, self).__init__()        self.hidden_size = hidden_size        self.embedding = nn.Embedding(output_size, hidden_size)        self.gru = nn.GRU(hidden_size, hidden_size)        self.out = nn.Linear(hidden_size, output_size)        self.softmax = nn.LogSoftmax(dim=1)    def forward(self, input, hidden):        output = self.embedding(input).view(1, 1, -1)        output = F.relu(output)        output, hidden = self.gru(output, hidden)        output = self.softmax(self.out(output[0]))        return output, hidden    def initHidden(self):        return torch.zeros(1, 1, self.hidden_size, device=device)

class AttnDecoderRNN(nn.Module):    def __init__(self, hidden_size, output_size, dropout_p=0.1, max_length=MAX_LENGTH):        super(AttnDecoderRNN, self).__init__()        self.hidden_size = hidden_size        self.output_size = output_size        self.dropout_p = dropout_p        self.max_length = max_length        self.embedding = nn.Embedding(self.output_size, self.hidden_size)        self.attn = nn.Linear(self.hidden_size * 2, self.max_length)        self.attn_combine = nn.Linear(self.hidden_size * 2, self.hidden_size)        self.dropout = nn.Dropout(self.dropout_p)        self.gru = nn.GRU(self.hidden_size, self.hidden_size)        self.out = nn.Linear(self.hidden_size, self.output_size)    def forward(self, input, hidden, encoder_outputs):        embedded = self.embedding(input).view(1, 1, -1)        embedded = self.dropout(embedded)        attn_weights = F.softmax(            self.attn(torch.cat((embedded[0], hidden[0]), 1)), dim=1)        attn_applied = torch.bmm(attn_weights.unsqueeze(0),                                 encoder_outputs.unsqueeze(0))        output = torch.cat((embedded[0], attn_applied[0]), 1)        output = self.attn_combine(output).unsqueeze(0)        output = F.relu(output)        output, hidden = self.gru(output, hidden)        output = F.log_softmax(self.out(output[0]), dim=1)        return output, hidden, attn_weights    def initHidden(self):        return torch.zeros(1, 1, self.hidden_size, device=device)

def indexesFromSentence(lang, sentence):    return [lang.word2index[word] for word in sentence.split(' ')]def indexesFromSentence_cn(lang, sentence):    return [lang.word2index[word] for word in list(jieba.cut(sentence))]def tensorFromSentence(lang, sentence):    indexes = indexesFromSentence(lang, sentence)    indexes.append(EOS_token)    return torch.tensor(indexes, dtype=torch.long, device=device).view(-1, 1)def tensorFromSentence_cn(lang, sentence):    indexes = indexesFromSentence_cn(lang, sentence)    indexes.append(EOS_token)    return torch.tensor(indexes, dtype=torch.long, device=device).view(-1, 1)def tensorsFromPair(pair):    input_tensor = tensorFromSentence_cn(input_lang, pair[0])    target_tensor = tensorFromSentence(output_lang, pair[1])    return (input_tensor, target_tensor)

### 训练模型 ###

teacher_forcing_ratio = 0.5def train(input_tensor, target_tensor, encoder, decoder, encoder_optimizer, decoder_optimizer, criterion, max_length=MAX_LENGTH):    encoder_hidden = encoder.initHidden()    encoder_optimizer.zero_grad()    decoder_optimizer.zero_grad()    input_length = input_tensor.size(0)    target_length = target_tensor.size(0)    encoder_outputs = torch.zeros(max_length, encoder.hidden_size, device=device)    loss = 0    for ei in range(input_length):        encoder_output, encoder_hidden = encoder(            input_tensor[ei], encoder_hidden)        encoder_outputs[ei] = encoder_output[0, 0]    decoder_input = torch.tensor([[SOS_token]], device=device)    decoder_hidden = encoder_hidden    use_teacher_forcing = True if random.random() < teacher_forcing_ratio else False    if use_teacher_forcing:        # Teacher forcing: Feed the target as the next input for di in range(target_length): decoder_output, decoder_hidden, decoder_attention = decoder( decoder_input, decoder_hidden, encoder_outputs) loss += criterion(decoder_output, target_tensor[di]) decoder_input = target_tensor[di] # Teacher forcing else: # Without teacher forcing: use its own predictions as the next input for di in range(target_length): decoder_output, decoder_hidden, decoder_attention = decoder( decoder_input, decoder_hidden, encoder_outputs) topv, topi = decoder_output.topk(1) decoder_input = topi.squeeze().detach() # detach from history as input loss += criterion(decoder_output, target_tensor[di]) if decoder_input.item() == EOS_token: break loss.backward() encoder_optimizer.step() decoder_optimizer.step() return loss.item() / target_length

import timeimport mathdef asMinutes(s):    m = math.floor(s / 60)    s -= m * 60    return '%dm %ds' % (m, s)def timeSince(since, percent):    now = time.time()    s = now - since    es = s / (percent)    rs = es - s    return '%s (- %s)' % (asMinutes(s), asMinutes(rs))

def trainIters(encoder, decoder, n_iters, print_every=1000, plot_every=100, learning_rate=0.01):    start = time.time()    plot_losses = []    print_loss_total = 0      plot_loss_total = 0     encoder_optimizer = optim.SGD(encoder.parameters(), lr=learning_rate)    decoder_optimizer = optim.SGD(decoder.parameters(), lr=learning_rate)    training_pairs = [tensorsFromPair(random.choice(pairs))                      for i in range(n_iters)]    criterion = nn.NLLLoss()    for iter in range(1, n_iters + 1):        training_pair = training_pairs[iter - 1]        input_tensor = training_pair[0]        target_tensor = training_pair[1]        loss = train(input_tensor, target_tensor, encoder,                     decoder, encoder_optimizer, decoder_optimizer, criterion)        print_loss_total += loss        plot_loss_total += loss        if iter % print_every == 0:            print_loss_avg = print_loss_total / print_every            print_loss_total = 0            print('%s (%d %d%%) %.4f' % (timeSince(start, iter / n_iters),                                         iter, iter / n_iters * 100, print_loss_avg))        if iter % plot_every == 0:            plot_loss_avg = plot_loss_total / plot_every            plot_losses.append(plot_loss_avg)            plot_loss_total = 0    showPlot(plot_losses)

import matplotlib.pyplot as plt%matplotlib inline#plt.switch_backend('agg')import matplotlib.ticker as tickerimport numpy as npdef showPlot(points): plt.figure() fig, ax = plt.subplots() # this locator puts ticks at regular intervals loc = ticker.MultipleLocator(base=0.2) ax.yaxis.set_major_locator(loc) plt.plot(points)

def evaluate(encoder, decoder, sentence, max_length=MAX_LENGTH):    with torch.no_grad():        input_tensor = tensorFromSentence_cn(input_lang, sentence)        input_length = input_tensor.size()[0]        encoder_hidden = encoder.initHidden()        encoder_outputs = torch.zeros(max_length, encoder.hidden_size, device=device)        for ei in range(input_length):            encoder_output, encoder_hidden = encoder(input_tensor[ei],                                                     encoder_hidden)            encoder_outputs[ei] += encoder_output[0, 0]        decoder_input = torch.tensor([[SOS_token]], device=device)  # SOS decoder_hidden = encoder_hidden decoded_words = [] decoder_attentions = torch.zeros(max_length, max_length) for di in range(max_length): decoder_output, decoder_hidden, decoder_attention = decoder( decoder_input, decoder_hidden, encoder_outputs) decoder_attentions[di] = decoder_attention.data topv, topi = decoder_output.data.topk(1) if topi.item() == EOS_token: decoded_words.append('<EOS>') break else: decoded_words.append(output_lang.index2word[topi.item()]) decoder_input = topi.squeeze().detach() return decoded_words, decoder_attentions[:di + 1]

def evaluateRandomly(encoder, decoder, n=10):    for i in range(n):        pair = random.choice(pairs)        print('>', pair[0])        print('=', pair[1])        output_words, attentions = evaluate(encoder, decoder, pair[0])        output_sentence = ' '.join(output_words)        print('<', output_sentence)        print('')

hidden_size = 256encoder1 = EncoderRNN(input_lang.n_words, hidden_size).to(device)attn_decoder1 = AttnDecoderRNN(hidden_size, output_lang.n_words, dropout_p=0.1).to(device)trainIters(encoder1, attn_decoder1, 75000, print_every=5000)

1m 54s (- 26m 36s) (5000 6%) 2.63943m 43s (- 24m 10s) (10000 13%) 1.09165m 34s (- 22m 19s) (15000 20%) 0.20577m 29s (- 20m 36s) (20000 26%) 0.04459m 27s (- 18m 54s) (25000 33%) 0.025311m 25s (- 17m 7s) (30000 40%) 0.020213m 20s (- 15m 14s) (35000 46%) 0.017515m 17s (- 13m 23s) (40000 53%) 0.016717m 15s (- 11m 30s) (45000 60%) 0.014119m 13s (- 9m 36s) (50000 66%) 0.013721m 12s (- 7m 42s) (55000 73%) 0.011023m 12s (- 5m 48s) (60000 80%) 0.011625m 12s (- 3m 52s) (65000 86%) 0.012527m 11s (- 1m 56s) (70000 93%) 0.009129m 11s (- 0m 0s) (75000 100%) 0.0095
    
    
    
    <Figure size 432x288 with 0 Axes>

![png][]

### 随机采样，对模型进行测试 ###

evaluateRandomly(encoder1, attn_decoder1)

> 今天下午我會外出。
    = i am going out this afternoon .
    < i am going out this afternoon . <EOS>
    
    > 我相信他是無辜的。
    = i am convinced that he is innocent .
    < i am convinced that he is innocent . <EOS>
    
    > 他在自己房里玩。
    = he is playing in his room .
    < he is playing in his room . <EOS>
    
    > 我來自四國。
    = i am from shikoku .
    < i am from shikoku . <EOS>
    
    > 她戴著一頂帽子。
    = she is wearing a hat .
    < she is wearing a hat . <EOS>
    
    > 您非常勇敢。
    = you are very courageous .
    < you are very brave . <EOS>
    
    > 他有几分像学者。
    = he is something of a scholar .
    < he is something of a scholar . <EOS>
    
    > 你真傻。
    = you are so stupid .
    < you are so stupid . <EOS>
    
    > 他年紀夠大可以瞭解它。
    = he is old enough to understand it .
    < he is old enough to understand it . <EOS>
    
    > 你別小看了他。
    = you are selling him short .
    < you are selling him short . <EOS>

def evaluate_randomly():
        pair = random.choice(pairs)
        
        output_words, decoder_attn = evaluate(pair[0])
        output_sentence = ' '.join(output_words)
        
        print('>', pair[0])
        print('=', pair[1])
        print('<', output_sentence)
        print('')

def evaluateRandomly(encoder, decoder, n=20):
        for i in range(n):
            pair = random.choice(pairs)
            print('>', pair[0])
            print('=', pair[1])
            output_words, attentions = evaluate(encoder, decoder, pair[0])
            output_sentence = ' '.join(output_words)
            print('<', output_sentence)
            print('')

### 可视化注意力 ###

def showAttention(input_sentence, output_words, attentions):
        # Set up figure with colorbar
        fig = plt.figure()
        ax = fig.add_subplot(111)
        cax = ax.matshow(attentions.numpy(), cmap='bone')
        fig.colorbar(cax)
    
        # Set up axes
        ax.set_xticklabels([''] + list(jieba.cut(input_sentence)) +
                           ['<EOS>'], rotation=90,fontproperties=myfont)
        ax.set_yticklabels([''] + output_words)
    
        # Show label at every tick
        ax.xaxis.set_major_locator(ticker.MultipleLocator(1))
        ax.yaxis.set_major_locator(ticker.MultipleLocator(1))
    
        plt.show()

def evaluateAndShowAttention(input_sentence):
        output_words, attentions = evaluate(
            encoder1, attn_decoder1, input_sentence)
        print('input =', input_sentence)
        print('output =', ' '.join(output_words))
        showAttention(input_sentence, output_words, attentions)
    
    
    evaluateAndShowAttention("我很幸福。")
    
    evaluateAndShowAttention("我们在严肃地谈论你的未来。")
    
    evaluateAndShowAttention("我在家。")
    
    evaluateAndShowAttention("我们在严肃地谈论你的未来。")

input = 我很幸福。
    output = i am very happy . <EOS>
    
    
    <ipython-input-23-2d6791f485ef>:9: UserWarning: FixedFormatter should only be used together with FixedLocator
      ax.set_xticklabels([''] + list(jieba.cut(input_sentence)) +
    <ipython-input-23-2d6791f485ef>:11: UserWarning: FixedFormatter should only be used together with FixedLocator
      ax.set_yticklabels([''] + output_words)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:240: RuntimeWarning: Glyph 25105 missing from current font.
      font.set_text(s, 0.0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:240: RuntimeWarning: Glyph 24456 missing from current font.
      font.set_text(s, 0.0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:240: RuntimeWarning: Glyph 24184 missing from current font.
      font.set_text(s, 0.0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:240: RuntimeWarning: Glyph 31119 missing from current font.
      font.set_text(s, 0.0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:240: RuntimeWarning: Glyph 12290 missing from current font.
      font.set_text(s, 0.0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:203: RuntimeWarning: Glyph 25105 missing from current font.
      font.set_text(s, 0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:203: RuntimeWarning: Glyph 24456 missing from current font.
      font.set_text(s, 0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:203: RuntimeWarning: Glyph 24184 missing from current font.
      font.set_text(s, 0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:203: RuntimeWarning: Glyph 31119 missing from current font.
      font.set_text(s, 0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:203: RuntimeWarning: Glyph 12290 missing from current font.
      font.set_text(s, 0, flags=flags)

![png][png 1]

input = 我们在严肃地谈论你的未来。
    output = we are having a serious talk about your future . <EOS>
    
    
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:240: RuntimeWarning: Glyph 20204 missing from current font.
      font.set_text(s, 0.0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:240: RuntimeWarning: Glyph 22312 missing from current font.
      font.set_text(s, 0.0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:240: RuntimeWarning: Glyph 20005 missing from current font.
      font.set_text(s, 0.0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:240: RuntimeWarning: Glyph 32899 missing from current font.
      font.set_text(s, 0.0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:240: RuntimeWarning: Glyph 22320 missing from current font.
      font.set_text(s, 0.0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:240: RuntimeWarning: Glyph 35848 missing from current font.
      font.set_text(s, 0.0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:240: RuntimeWarning: Glyph 35770 missing from current font.
      font.set_text(s, 0.0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:240: RuntimeWarning: Glyph 20320 missing from current font.
      font.set_text(s, 0.0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:240: RuntimeWarning: Glyph 30340 missing from current font.
      font.set_text(s, 0.0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:240: RuntimeWarning: Glyph 26410 missing from current font.
      font.set_text(s, 0.0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:240: RuntimeWarning: Glyph 26469 missing from current font.
      font.set_text(s, 0.0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:203: RuntimeWarning: Glyph 20204 missing from current font.
      font.set_text(s, 0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:203: RuntimeWarning: Glyph 22312 missing from current font.
      font.set_text(s, 0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:203: RuntimeWarning: Glyph 20005 missing from current font.
      font.set_text(s, 0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:203: RuntimeWarning: Glyph 32899 missing from current font.
      font.set_text(s, 0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:203: RuntimeWarning: Glyph 22320 missing from current font.
      font.set_text(s, 0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:203: RuntimeWarning: Glyph 35848 missing from current font.
      font.set_text(s, 0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:203: RuntimeWarning: Glyph 35770 missing from current font.
      font.set_text(s, 0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:203: RuntimeWarning: Glyph 20320 missing from current font.
      font.set_text(s, 0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:203: RuntimeWarning: Glyph 30340 missing from current font.
      font.set_text(s, 0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:203: RuntimeWarning: Glyph 26410 missing from current font.
      font.set_text(s, 0, flags=flags)
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:203: RuntimeWarning: Glyph 26469 missing from current font.
      font.set_text(s, 0, flags=flags)

![png][png 2]

input = 我在家。output = i am at home . <EOS>
    
    
    /Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:240: RuntimeWarning: Glyph 23478 missing from current font.  font.set_text(s, 0.0, flags=flags)/Users/maqi/opt/anaconda3/envs/mq_env/lib/python3.8/site-packages/matplotlib/backends/backend_agg.py:203: RuntimeWarning: Glyph 23478 missing from current font.  font.set_text(s, 0, flags=flags)

![png][png 3]

input = 我们在严肃地谈论你的未来。output = we are having a serious talk about your future . <EOS>

![png][png 4]

[png]: /images/20220829/45799e71ce5440dab3ff7f4bccae2704.png
[png 1]: /images/20220829/d58ad0c7314849de9e01853f40d16b9b.png
[png 2]: /images/20220829/f2c60341a628418994262976c2993371.png
[png 3]: /images/20220829/193a45a614db4e35a9e09796ce3de383.png
[png 4]: /images/20220829/8e1b1d3d6cda4c7696dc654f1dd4c4ec.png