def make_model(src_vocab,
tgt_vocab,
N=6,
d_model=512,
d_ff=2048,
h=8,
dropout=0.1):
"从超参数构造模型"
c = copy.deepcopy
attn = MultiHeadedAttention(h, d_model)
ff = PositionwiseFeedForward(d_model, d_ff, dropout)
position = PositionalEncoding(d_model, dropout)
model = EncoderDecoder(
Encoder(EncoderLayer(d_model, c(attn), c(ff), dropout), N),
Decoder(DecoderLayer(d_model, c(attn), c(attn), c(ff), dropout), N),
nn.Sequential(Embeddings(d_model, src_vocab), c(position)),
nn.Sequential(Embeddings(d_model, tgt_vocab), c(position)),
Generator(d_model, tgt_vocab))
# 从代码来看，使用 Glorot / fan_avg初始化参数很重要。
# 对参数进行均匀分布初始化
for p in model.parameters():
if p.dim() > 1:
nn.init.xavier_uniform_(p)
return model
def __init__(self, vocab_size, d_model, N, heads, dropout):
super().__init__()
self.N = N
self.embed = Embedder(vocab_size, d_model)
self.pe = PositionalEncoder(d_model, dropout=dropout)
self.layers = get_clones(DecoderLayer(d_model, heads, dropout), N)
self.norm = Norm(d_model)
def __init__(self, bert, hidden_size, num_hidden_layers, num_attention_heads, dropout):
super().__init__()
self.N = num_hidden_layers
self.bert = bert
self.pe = PositionalEncoder(hidden_size, dropout=dropout)
self.layers = get_clones(DecoderLayer(hidden_size, num_attention_heads, dropout), num_hidden_layers)
self.norm = Norm(hidden_size)
def make_model_newast(src_vocab, tgt_vocab, ast_vocab, kg_embed, N=6, d_model=512, d_ff=2048, d_intermediate=512, h=8, dropout=0.1):
"从超参数构造模型"
c = copy.deepcopy
attn = MultiHeadedAttention(h, d_model)
attn_ent = MultiHeadedAttention(h, d_model)
attn_ast = MultiHeadedAttention(h, d_model)
ff = PositionwiseFeedForward(d_model, d_ff, dropout)
position = PositionalEncoding(d_model, dropout)
with open(kg_embed, "r", encoding='utf-8') as f:
lines = json.loads(f.read())
vecs = list()
# vecs.append([0] * 100) # CLS
for (i, line) in enumerate(lines):
if line == "ent_embeddings":
for vec in lines[line]:
vec = [float(x) for x in vec]
vecs.append(vec)
embed = torch.FloatTensor(vecs)
model = EncoderDecoder4newAST(
Encoder4KG(EncoderLayer4KG(d_model, d_intermediate, c(attn), c(attn_ent), c(ff), dropout), N),
Encoder4newAST(EncoderLayer4newAST(d_model, c(attn_ast), c(ff), dropout), N),
Decoder(DecoderLayer(d_model, c(attn), c(attn), c(ff), dropout), N),
nn.Sequential(Embeddings(d_model, src_vocab), c(position)),
torch.nn.Embedding.from_pretrained(embed),
nn.Sequential(Embeddings(d_model, 5000), c(position)),
nn.Sequential(Embeddings(d_model, tgt_vocab), c(position)),
Generator(d_model, tgt_vocab))
# 从代码来看，使用 Glorot / fan_avg初始化参数很重要。
# 对参数进行均匀分布初始化
for p in model.parameters():
if p.dim() > 1:
nn.init.xavier_uniform_(p)
return model
def __init__(self, n_trg_vocab, d_word_vec, n_layers, n_head, d_k, d_v,
d_model, d_inner, pad_idx, n_position=200, dropout=0.1):
"""Set the hyper-parameters and build the layers."""
super(Decoder, self).__init__()
self.trg_word_emb = nn.Embedding(n_trg_vocab, d_word_vec, padding_idx=pad_idx)
self.position_enc = PositionalEncoding(d_word_vec, n_position=n_position)
self.dropout = nn.Dropout(p=dropout)
self.layer_stack = nn.ModuleList([
DecoderLayer(d_model, d_inner, n_head, d_k, d_v, dropout=dropout)
for _ in range(n_layers)])
self.layer_norm = nn.LayerNorm(d_model, eps=1e-6)
def __init__(self, vocab_size, d_model, N, heads, dropout,
decoder_extra_layers, field, word_emb, opt):
super().__init__()
self.N = N
self.opt = opt
self.word_emb = word_emb # unused, just for querying
self.embed = Embedder(vocab_size, d_model, word_emb, field)
self.pe = PositionalEncoder(d_model, dropout=dropout)
self.layers = get_clones(
DecoderLayer(d_model, heads, decoder_extra_layers, dropout), N,
decoder_extra_layers)
self.norm = Norm(d_model)
def __init__(
self,
n_tgt_vocab, len_max_seq, d_word_vec,
n_layers, n_head, d_k, d_v,
d_model, d_inner, dropout=0.1, pretrained_embeddings=None):
super().__init__()
n_position = len_max_seq + 1
self.layer_stack = nn.ModuleList([
DecoderLayer(d_model, d_inner, n_head, d_k, d_v, dropout=dropout)
for _ in range(n_layers)])
def __init__(self, bpe_size, h, d_model, p, d_ff):
super(Transformer, self).__init__()
self.bpe_size = bpe_size
self.word_emb = nn.Embedding(bpe_size, d_model, padding_idx=0)
self.pos_emb = PositionalEncoding(d_model, p)
self.encoder = nn.ModuleList([EncoderLayer(h, d_model, p, d_ff) for _ in range(6)])
self.decoder = nn.ModuleList([DecoderLayer(h, d_model, p, d_ff) for _ in range(6)])
self.generator = nn.Linear(d_model, bpe_size, bias=False)
# tie weight between word embedding and generator
self.generator.weight = self.word_emb.weight
self.logsoftmax = nn.LogSoftmax()
# pre-save a mask to avoid future information in self-attentions in decoder
# save as a buffer, otherwise will need to recreate it and move to GPU during every call
mask = torch.ByteTensor(np.triu(np.ones((512,512)), k=1).astype('uint8'))
self.register_buffer('mask', mask)
def __init__(self,
num_layers,
d_model,
num_heads,
dff,
target_vocab_size,
maximum_position_encoding,
rate=0.1):
super(ImageCaptioningDecoder, self).__init__()
self.d_model = d_model
self.num_layers = num_layers
self.embedding = tf.keras.layers.Embedding(target_vocab_size, d_model)
self.pos_encoding = positional_encoding(maximum_position_encoding,
d_model)
self.dec_layers = [
DecoderLayer(d_model, num_heads, dff, rate)
for _ in range(num_layers)
]
self.dropout = tf.keras.layers.Dropout(rate)
def make_model(src_vocab,
tgt_vocab,
N=6,
d_model=512,
d_ff=2048,
h=8,
dropout=.1):
""" construct model from hyper-parameters"""
c = copy.deepcopy
attn_rpr = MultiHeadedAttention_RPR(d_model, h, max_relative_position=5)
attn = MultiHeadedAttention(d_model, h)
ff = PositionwiseFeedForward(d_model, d_ff, dropout)
position = PositionalEncoding(d_model, dropout)
model = EncoderDecoder(
Encoder(EncoderLayer(d_model, c(attn_rpr), c(ff), dropout), N),
Decoder(DecoderLayer(d_model, c(attn_rpr), c(attn), c(ff), dropout),
N), nn.Sequential(Embeddings(d_model, src_vocab), c(position)),
nn.Sequential(Embeddings(d_model, tgt_vocab), c(position)),
Generator(d_model, tgt_vocab))
for p in model.parameters():
if p.dim() > 1:
nn.init.xavier_uniform_(p)
return model
def __init__(self,
n_tgt_vocab,
n_max_seq,
n_layers=6,
n_head=8,
d_k=64,
d_v=64,
d_word_vec=512,
d_model=512,
d_inner_hid=1024,
dropout=0.1):
super(Decoder, self).__init__()
n_position = n_max_seq + 1
self.n_max_seq = n_max_seq
self.d_model = d_model
self.position_enc = nn.Embedding(n_position,
d_word_vec,
padding_idx=Constants.PAD)
self.position_enc.weight.data = position_encoding_init(
n_position, d_word_vec)
self.tgt_word_emb = nn.Embedding(n_tgt_vocab,
d_word_vec,
padding_idx=Constants.PAD)
self.dropout = nn.Dropout(dropout)
self.layer_stack = nn.ModuleList([
DecoderLayer(d_model,
d_inner_hid,
n_head,
d_k,
d_v,
dropout=dropout) for _ in range(n_layers)
])
def __init__(self, d_input, d_model, N, heads, dropout):
super().__init__()
self.N = N
self.layers = get_clones(
DecoderLayer(d_input, d_model, heads, dropout), N)
self.norm = nn.LayerNorm(d_model)
def make_model_ast(src_vocab, tgt_vocab, voc_size, device, kg_embed, ast_embed, N=6, d_model=512, d_ff=2048,
d_intermediate=512, h=8, dropout=0.1, embedding_dim=512, hidden_size=512):
# "????????
c = copy.deepcopy
attn = MultiHeadedAttention(h, d_model)
attn_ent = MultiHeadedAttention(h, d_model)
ff = PositionwiseFeedForward(d_model, d_ff, dropout)
position = PositionalEncoding(d_model, dropout)
with open(kg_embed, "r", encoding='utf-8') as f:
lines = json.loads(f.read())
vecs = list()
# vecs.append([0] * 100) # CLS
for (i, line) in enumerate(lines):
if line == "ent_embeddings":
for vec in lines[line]:
vec = [float(x) for x in vec]
vecs.append(vec)
embed = torch.FloatTensor(vecs)
ast_size = voc_size
path_listtensor = list()
lstm = LSTM(voc_size, embedding_dim, hidden_size)
# bilstm = BiLSTM(voc_size, embedding_dim, hidden_size, device)
# for k in ast_embed.keys():
# pathlist = ast_embed[k]
# path_tensor = torch.zeros(voc_size).long()
# path_tensor = Variable(path_tensor).to(device)
# for p in pathlist:
# outpath = torch.zeros(voc_size).long()
# outpath = Variable(outpath).to(device)
# p.unsqueeze(0)
# hidden = lstm.init_hidden().to(device)
# cell_state = lstm.init_cell_state().to(device)
# #cell_state_b = lstm.init_cell_state().to(device)
# i = 0
# while i < (list(p.size())[0]):
# # output, hiddenout, cell_state, cell_state_b = bilstm.forward(p[i], p[list(p.size())[0] - 1 - i], hidden, cell_state, cell_state_b)
# output, hidden, cell_state = lstm(p[i], hidden, cell_state)
# i += 1
# outpath += output
# path_tensor += outpath
#
# path_float = list()
# for x in path_tensor:
# path_float.append(float(x))
# path_listtensor.append(path_float)
# ast_embed = torch.FloatTensor(path_listtensor)
model = EncoderDecoder4AST(
Encoder4AST(EncoderLayer4AST(d_model, d_intermediate, ast_size, c(attn), c(attn_ent), c(ff), dropout, voc_size,
embedding_dim, hidden_size, device), N),
Decoder(DecoderLayer(d_model, c(attn), c(attn), c(ff), dropout), N),
nn.Sequential(Embeddings(d_model, src_vocab), c(position)),
torch.nn.Embedding.from_pretrained(embed),
#nn.Sequential(Embeddings(d_model, voc_size)),
nn.Sequential(Embeddings(d_model, tgt_vocab), c(position)),
Generator(d_model, tgt_vocab))
# ?????,?? Glorot / fan_avg?????????
# ????????????
for p in model.parameters():
if p.dim() > 1:
nn.init.xavier_uniform_(p)
return model