rename losses -> loss

ppcls/engine/trainer.py

@@ -30,7 +30,7 @@ from ppcls.utils.misc import AverageMeter
 from ppcls.utils import logger
 from ppcls.data import build_dataloader
 from ppcls.arch import build_model
-from ppcls.losses import build_loss
+from ppcls.loss import build_loss
 from ppcls.arch.loss_metrics import build_metrics
 from ppcls.optimizer import build_optimizer
 from ppcls.utils.save_load import load_dygraph_pretrain

ppcls/loss/centerloss.py

@@ -5,12 +5,15 @@ import paddle
 import paddle.nn as nn
 import paddle.nn.functional as F
 
+
 class CenterLoss(nn.Layer):
     def __init__(self, num_classes=5013, feat_dim=2048):
         super(CenterLoss, self).__init__()
         self.num_classes = num_classes
         self.feat_dim = feat_dim
-        self.centers  = paddle.randn(shape=[self.num_classes, self.feat_dim]).astype("float64")  #random center
+        self.centers = paddle.randn(
+            shape=[self.num_classes, self.feat_dim]).astype(
+                "float64")  #random center
 
     def __call__(self, input, target):
         """
@@ -23,25 +26,29 @@ class CenterLoss(nn.Layer):
 
         #calc feat * feat   
         dist1 = paddle.sum(paddle.square(feats), axis=1, keepdim=True)
-        dist1 = paddle.expand(dist1, [batch_size, self.num_classes])  
+        dist1 = paddle.expand(dist1, [batch_size, self.num_classes])
 
         #dist2 of centers
-        dist2 = paddle.sum(paddle.square(self.centers), axis=1, keepdim=True)   #num_classes
-        dist2 = paddle.expand(dist2, [self.num_classes, batch_size]).astype("float64")
+        dist2 = paddle.sum(paddle.square(self.centers), axis=1,
+                           keepdim=True)  #num_classes
+        dist2 = paddle.expand(dist2,
+                              [self.num_classes, batch_size]).astype("float64")
         dist2 = paddle.transpose(dist2, [1, 0])
 
         #first x * x + y * y
         distmat = paddle.add(dist1, dist2)
-        tmp = paddle.matmul(feats,  paddle.transpose(self.centers, [1, 0]))
-        distmat = distmat -  2.0 * tmp
+        tmp = paddle.matmul(feats, paddle.transpose(self.centers, [1, 0]))
+        distmat = distmat - 2.0 * tmp
 
         #generate the mask
         classes = paddle.arange(self.num_classes).astype("int64")
-        labels  = paddle.expand(paddle.unsqueeze(labels, 1), (batch_size, self.num_classes))
-        mask    = paddle.equal(paddle.expand(classes, [batch_size, self.num_classes]), labels).astype("float64")  #get mask
+        labels = paddle.expand(
+            paddle.unsqueeze(labels, 1), (batch_size, self.num_classes))
+        mask = paddle.equal(
+            paddle.expand(classes, [batch_size, self.num_classes]),
+            labels).astype("float64")  #get mask
 
-        dist = paddle.multiply(distmat,  mask)
+        dist = paddle.multiply(distmat, mask)
         loss = paddle.sum(paddle.clip(dist, min=1e-12, max=1e+12)) / batch_size
 
         return {'CenterLoss': loss}
-    

ppcls/loss/comfunc.py

@@ -18,26 +18,27 @@ from __future__ import print_function
 
 import numpy as np
 
+
 def rerange_index(batch_size, samples_each_class):
-    tmp = np.arange(0, batch_size * batch_size) 
-    tmp = tmp.reshape(-1, batch_size) 
+    tmp = np.arange(0, batch_size * batch_size)
+    tmp = tmp.reshape(-1, batch_size)
     rerange_index = []
 
     for i in range(batch_size):
         step = i // samples_each_class
         start = step * samples_each_class
-        end   = (step + 1) * samples_each_class
+        end = (step + 1) * samples_each_class
 
-        pos_idx = []   
-        neg_idx = []   
+        pos_idx = []
+        neg_idx = []
         for j, k in enumerate(tmp[i]):
             if j >= start and j < end:
                 if j == i:
                     pos_idx.insert(0, k)
                 else:
-                    pos_idx.append(k)  
+                    pos_idx.append(k)
             else:
-                neg_idx.append(k)  
+                neg_idx.append(k)
         rerange_index += (pos_idx + neg_idx)
 
     rerange_index = np.array(rerange_index).astype(np.int32)

ppcls/loss/emlloss.py

@@ -21,56 +21,64 @@ import paddle
 import numpy as np
 from .comfunc import rerange_index
 
+
 class EmlLoss(paddle.nn.Layer):
-    def __init__(self, batch_size = 40, samples_each_class = 2):
+    def __init__(self, batch_size=40, samples_each_class=2):
         super(EmlLoss, self).__init__()
-        assert(batch_size % samples_each_class == 0)
+        assert (batch_size % samples_each_class == 0)
         self.samples_each_class = samples_each_class
-        self.batch_size   = batch_size
-        self.rerange_index      = rerange_index(batch_size, samples_each_class)
+        self.batch_size = batch_size
+        self.rerange_index = rerange_index(batch_size, samples_each_class)
         self.thresh = 20.0
-        self.beta   = 100000
-        
+        self.beta = 100000
+
     def surrogate_function(self, beta, theta, bias):
-        x = theta * paddle.exp(bias) 
+        x = theta * paddle.exp(bias)
         output = paddle.log(1 + beta * x) / math.log(1 + beta)
         return output
 
     def surrogate_function_approximate(self, beta, theta, bias):
-        output = (paddle.log(theta) + bias + math.log(beta)) / math.log(1+beta)
+        output = (
+            paddle.log(theta) + bias + math.log(beta)) / math.log(1 + beta)
         return output
 
     def surrogate_function_stable(self, beta, theta, target, thresh):
         max_gap = paddle.to_tensor(thresh, dtype='float32')
         max_gap.stop_gradient = True
-        
+
         target_max = paddle.maximum(target, max_gap)
         target_min = paddle.minimum(target, max_gap)
-        
+
         loss1 = self.surrogate_function(beta, theta, target_min)
         loss2 = self.surrogate_function_approximate(beta, theta, target_max)
-        bias  = self.surrogate_function(beta, theta, max_gap)
-        loss  = loss1 + loss2 - bias
+        bias = self.surrogate_function(beta, theta, max_gap)
+        loss = loss1 + loss2 - bias
         return loss
 
     def forward(self, input, target=None):
         features = input["features"]
         samples_each_class = self.samples_each_class
-        batch_size         = self.batch_size
-        rerange_index      = self.rerange_index
-        
+        batch_size = self.batch_size
+        rerange_index = self.rerange_index
+
         #calc distance
-        diffs = paddle.unsqueeze(features, axis=1) - paddle.unsqueeze(features, axis=0)
-        similary_matrix =  paddle.sum(paddle.square(diffs), axis=-1)   
-    
-        tmp = paddle.reshape(similary_matrix, shape = [-1, 1]) 
+        diffs = paddle.unsqueeze(
+            features, axis=1) - paddle.unsqueeze(
+                features, axis=0)
+        similary_matrix = paddle.sum(paddle.square(diffs), axis=-1)
+
+        tmp = paddle.reshape(similary_matrix, shape=[-1, 1])
         rerange_index = paddle.to_tensor(rerange_index)
-        tmp = paddle.gather(tmp, index=rerange_index)   
-        similary_matrix = paddle.reshape(tmp, shape=[-1, batch_size])  
-        
-        ignore, pos, neg = paddle.split(similary_matrix, num_or_sections= [1, 
-            samples_each_class - 1, batch_size - samples_each_class], axis = 1)
-        ignore.stop_gradient = True 
+        tmp = paddle.gather(tmp, index=rerange_index)
+        similary_matrix = paddle.reshape(tmp, shape=[-1, batch_size])
+
+        ignore, pos, neg = paddle.split(
+            similary_matrix,
+            num_or_sections=[
+                1, samples_each_class - 1, batch_size - samples_each_class
+            ],
+            axis=1)
+        ignore.stop_gradient = True
 
         pos_max = paddle.max(pos, axis=1, keepdim=True)
         pos = paddle.exp(pos - pos_max)
@@ -79,11 +87,11 @@ class EmlLoss(paddle.nn.Layer):
         neg_min = paddle.min(neg, axis=1, keepdim=True)
         neg = paddle.exp(neg_min - neg)
         neg_mean = paddle.mean(neg, axis=1, keepdim=True)
-        
+
         bias = pos_max - neg_min
         theta = paddle.multiply(neg_mean, pos_mean)
 
-        loss = self.surrogate_function_stable(self.beta, theta, bias, self.thresh)
+        loss = self.surrogate_function_stable(self.beta, theta, bias,
+                                              self.thresh)
         loss = paddle.mean(loss)
         return {"emlloss": loss}
-    

ppcls/loss/msmloss.py

@@ -18,6 +18,7 @@ from __future__ import print_function
 import paddle
 from .comfunc import rerange_index
 
+
 class MSMLoss(paddle.nn.Layer):
     """
     MSMLoss Loss, based on triplet loss. USE P * K samples.
@@ -31,42 +32,47 @@ class MSMLoss(paddle.nn.Layer):
         ]
     only consider samples_each_class = 2
     """
-    def __init__(self, batch_size = 120, samples_each_class=2,  margin=0.1):
+
+    def __init__(self, batch_size=120, samples_each_class=2, margin=0.1):
         super(MSMLoss, self).__init__()
         self.margin = margin
         self.samples_each_class = samples_each_class
-        self.batch_size         = batch_size
-        self.rerange_index      = rerange_index(batch_size, samples_each_class)
+        self.batch_size = batch_size
+        self.rerange_index = rerange_index(batch_size, samples_each_class)
 
     def forward(self, input, target=None):
         #normalization 
         features = input["features"]
         features = self._nomalize(features)
         samples_each_class = self.samples_each_class
-        rerange_index      = paddle.to_tensor(self.rerange_index)
+        rerange_index = paddle.to_tensor(self.rerange_index)
 
         #calc sm
-        diffs = paddle.unsqueeze(features, axis=1) - paddle.unsqueeze(features, axis=0)
-        similary_matrix =  paddle.sum(paddle.square(diffs), axis=-1)
-        
-        #rerange 
-        tmp = paddle.reshape(similary_matrix, shape = [-1, 1]) 
-        tmp = paddle.gather(tmp, index=rerange_index)   
-        similary_matrix = paddle.reshape(tmp, shape=[-1, self.batch_size])  
-        
-        #split
-        ignore, pos, neg = paddle.split(similary_matrix, num_or_sections= [1, 
-            samples_each_class - 1, -1], axis = 1)
-        ignore.stop_gradient = True   
+        diffs = paddle.unsqueeze(
+            features, axis=1) - paddle.unsqueeze(
+                features, axis=0)
+        similary_matrix = paddle.sum(paddle.square(diffs), axis=-1)
 
-        hard_pos = paddle.max(pos)   
+        #rerange 
+        tmp = paddle.reshape(similary_matrix, shape=[-1, 1])
+        tmp = paddle.gather(tmp, index=rerange_index)
+        similary_matrix = paddle.reshape(tmp, shape=[-1, self.batch_size])
+
+        #split
+        ignore, pos, neg = paddle.split(
+            similary_matrix,
+            num_or_sections=[1, samples_each_class - 1, -1],
+            axis=1)
+        ignore.stop_gradient = True
+
+        hard_pos = paddle.max(pos)
         hard_neg = paddle.min(neg)
 
         loss = hard_pos + self.margin - hard_neg
-        loss = paddle.nn.ReLU()(loss)  
+        loss = paddle.nn.ReLU()(loss)
         return {"msmloss": loss}
 
     def _nomalize(self, input):
-        input_norm = paddle.sqrt(paddle.sum(paddle.square(input), axis=1, keepdim=True))
+        input_norm = paddle.sqrt(
+            paddle.sum(paddle.square(input), axis=1, keepdim=True))
         return paddle.divide(input, input_norm)
-    

ppcls/loss/npairsloss.py

@@ -3,12 +3,12 @@ from __future__ import division
 from __future__ import print_function
 import paddle
 
+
 class NpairsLoss(paddle.nn.Layer):
-    
     def __init__(self, reg_lambda=0.01):
         super(NpairsLoss, self).__init__()
         self.reg_lambda = reg_lambda
-        
+
     def forward(self, input, target=None):
         """
         anchor and positive(should include label)
@@ -16,22 +16,23 @@ class NpairsLoss(paddle.nn.Layer):
         features = input["features"]
         reg_lambda = self.reg_lambda
         batch_size = features.shape[0]
-        fea_dim    = features.shape[1]
+        fea_dim = features.shape[1]
         num_class = batch_size // 2
-        
+
         #reshape
         out_feas = paddle.reshape(features, shape=[-1, 2, fea_dim])
-        anc_feas, pos_feas = paddle.split(out_feas, num_or_sections = 2, axis = 1)
-        anc_feas   = paddle.squeeze(anc_feas, axis=1)
+        anc_feas, pos_feas = paddle.split(out_feas, num_or_sections=2, axis=1)
+        anc_feas = paddle.squeeze(anc_feas, axis=1)
         pos_feas = paddle.squeeze(pos_feas, axis=1)
-        
+
         #get simi matrix
-        similarity_matrix = paddle.matmul(anc_feas, pos_feas, transpose_y=True)     #get similarity matrix
+        similarity_matrix = paddle.matmul(
+            anc_feas, pos_feas, transpose_y=True)  #get similarity matrix
         sparse_labels = paddle.arange(0, num_class, dtype='int64')
-        xentloss = paddle.nn.CrossEntropyLoss()(similarity_matrix, sparse_labels)   #by default: mean
-        
+        xentloss = paddle.nn.CrossEntropyLoss()(
+            similarity_matrix, sparse_labels)  #by default: mean
+
         #l2 norm
         reg = paddle.mean(paddle.sum(paddle.square(features), axis=1))
         l2loss = 0.5 * reg_lambda * reg
         return {"npairsloss": xentloss + l2loss}
-    

ppcls/loss/trihardloss.py

@@ -19,6 +19,7 @@ from __future__ import print_function
 import paddle
 from .comfunc import rerange_index
 
+
 class TriHardLoss(paddle.nn.Layer):
     """
     TriHard Loss, based on triplet loss. USE P * K samples.
@@ -32,45 +33,50 @@ class TriHardLoss(paddle.nn.Layer):
         ]
     only consider samples_each_class = 2
     """
-    def __init__(self, batch_size = 120, samples_each_class=2,  margin=0.1):
+
+    def __init__(self, batch_size=120, samples_each_class=2, margin=0.1):
         super(TriHardLoss, self).__init__()
         self.margin = margin
         self.samples_each_class = samples_each_class
-        self.batch_size         = batch_size
-        self.rerange_index      = rerange_index(batch_size, samples_each_class)
+        self.batch_size = batch_size
+        self.rerange_index = rerange_index(batch_size, samples_each_class)
 
     def forward(self, input, target=None):
         features = input["features"]
         assert (self.batch_size == features.shape[0])
-        
+
         #normalization 
         features = self._nomalize(features)
         samples_each_class = self.samples_each_class
-        rerange_index      = paddle.to_tensor(self.rerange_index)
+        rerange_index = paddle.to_tensor(self.rerange_index)
 
         #calc sm
-        diffs = paddle.unsqueeze(features, axis=1) - paddle.unsqueeze(features, axis=0)
-        similary_matrix =  paddle.sum(paddle.square(diffs), axis=-1)
-        
+        diffs = paddle.unsqueeze(
+            features, axis=1) - paddle.unsqueeze(
+                features, axis=0)
+        similary_matrix = paddle.sum(paddle.square(diffs), axis=-1)
+
         #rerange 
-        tmp = paddle.reshape(similary_matrix, shape = [-1, 1]) 
-        tmp = paddle.gather(tmp, index=rerange_index)   
-        similary_matrix = paddle.reshape(tmp, shape=[-1, self.batch_size])  
-        
+        tmp = paddle.reshape(similary_matrix, shape=[-1, 1])
+        tmp = paddle.gather(tmp, index=rerange_index)
+        similary_matrix = paddle.reshape(tmp, shape=[-1, self.batch_size])
+
         #split
-        ignore, pos, neg = paddle.split(similary_matrix, num_or_sections= [1, 
-            samples_each_class - 1, -1], axis = 1)
-        
-        ignore.stop_gradient = True    
-        hard_pos = paddle.max(pos, axis=1) 
+        ignore, pos, neg = paddle.split(
+            similary_matrix,
+            num_or_sections=[1, samples_each_class - 1, -1],
+            axis=1)
+
+        ignore.stop_gradient = True
+        hard_pos = paddle.max(pos, axis=1)
         hard_neg = paddle.min(neg, axis=1)
 
         loss = hard_pos + self.margin - hard_neg
-        loss = paddle.nn.ReLU()(loss)    
+        loss = paddle.nn.ReLU()(loss)
         loss = paddle.mean(loss)
         return {"trihardloss": loss}
 
     def _nomalize(self, input):
-        input_norm = paddle.sqrt(paddle.sum(paddle.square(input), axis=1, keepdim=True))
+        input_norm = paddle.sqrt(
+            paddle.sum(paddle.square(input), axis=1, keepdim=True))
         return paddle.divide(input, input_norm)
-