beta-0.1

lib/models/cell_infers/cells.py

@@ -0,0 +1,51 @@
+##################################################
+# Copyright (c) Xuanyi Dong [GitHub D-X-Y], 2019 #
+##################################################
+import torch
+import torch.nn as nn
+from copy import deepcopy
+from ..cell_operations import OPS
+
+
+class InferCell(nn.Module):
+
+  def __init__(self, genotype, C_in, C_out, stride):
+    super(InferCell, self).__init__()
+
+    self.layers  = nn.ModuleList()
+    self.node_IN = []
+    self.node_IX = []
+    self.genotype = deepcopy(genotype)
+    for i in range(1, len(genotype)):
+      node_info = genotype[i-1]
+      cur_index = []
+      cur_innod = []
+      for (op_name, op_in) in node_info:
+        if op_in == 0:
+          layer = OPS[op_name](C_in , C_out, stride)
+        else:
+          layer = OPS[op_name](C_out, C_out,      1)
+        cur_index.append( len(self.layers) )
+        cur_innod.append( op_in )
+        self.layers.append( layer )
+      self.node_IX.append( cur_index )
+      self.node_IN.append( cur_innod )
+    self.nodes   = len(genotype)
+    self.in_dim  = C_in
+    self.out_dim = C_out
+
+  def extra_repr(self):
+    string = 'info :: nodes={nodes}, inC={in_dim}, outC={out_dim}'.format(**self.__dict__)
+    laystr = []
+    for i, (node_layers, node_innods) in enumerate(zip(self.node_IX,self.node_IN)):
+      y = ['I{:}-L{:}'.format(_ii, _il) for _il, _ii in zip(node_layers, node_innods)]
+      x = '{:}<-({:})'.format(i+1, ','.join(y))
+      laystr.append( x )
+    return string + ', [{:}]'.format( ' | '.join(laystr) ) + ', {:}'.format(self.genotype.tostr())
+
+  def forward(self, inputs):
+    nodes = [inputs]
+    for i, (node_layers, node_innods) in enumerate(zip(self.node_IX,self.node_IN)):
+      node_feature = sum( self.layers[_il](nodes[_ii]) for _il, _ii in zip(node_layers, node_innods) )
+      nodes.append( node_feature )
+    return nodes[-1]