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# coding=utf-8
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import copy
import logging
import math
from os.path import join as pjoin
import torch
import torch.nn as nn
import numpy as np
from torch.nn import BCEWithLogitsLoss,CrossEntropyLoss, Dropout, Softmax, Linear, Conv2d, LayerNorm
from torch.nn.modules.utils import _pair
from scipy import ndimage
import models.configs as configs
from models.attention import Attention
from models.embed import Embeddings
import pdb
def swish(x):
return x * torch.sigmoid(x)
ACT2FN = {"gelu": torch.nn.functional.gelu, "relu": torch.nn.functional.relu, "swish": swish}
class Mlp(nn.Module):
def __init__(self, config):
super(Mlp, self).__init__()
self.fc1 = Linear(config.hidden_size, config.transformer["mlp_dim"])
self.fc2 = Linear(config.transformer["mlp_dim"], config.hidden_size)
self.act_fn = ACT2FN["gelu"]
self.dropout = Dropout(config.transformer["dropout_rate"])
self._init_weights()
def _init_weights(self):
nn.init.xavier_uniform_(self.fc1.weight)
nn.init.xavier_uniform_(self.fc2.weight)
nn.init.normal_(self.fc1.bias, std=1e-6)
nn.init.normal_(self.fc2.bias, std=1e-6)
def forward(self, x):
x = self.fc1(x)
x = self.act_fn(x)
x = self.dropout(x)
x = self.fc2(x)
x = self.dropout(x)
return x
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