convert_to_generator_like num_samples属性错误:"int"对象没有属性"shape" [英] convert_to_generator_like num_samples Attribute Error: 'int' object has no attribute 'shape'
问题描述
我使用Keras序列编写了一个自定义生成器,但是在第一个纪元结束时,我得到了: 属性错误:自定义生成器对象没有属性形状"
I've written a custom generator using Keras sequence, but at the end of first epoch i got: Attribute Error: Custom Generator object has no attribute 'shape'
Ubuntu 18.04 CUDA 10 尝试过Tensorflow 1.13& 1.14 看到此页面: https://github.com/keras-team/keras/issues/12586 我试图改变 从keras.utils导入序列 到 从tensorflow.python.keras.utils.data_utils导入序列 但没有运气!
Ubuntu 18.04 Cuda 10 Tried Tensorflow 1.13 & 1.14 seeing this page: https://github.com/keras-team/keras/issues/12586 i tried changing from keras.utils import Sequence to from tensorflow.python.keras.utils.data_utils import Sequence but no luck!
class CustomGenerator(Sequence):
def __init__(self, ....):
...
# Preallocate memory
if mode == 'train' and self.crop_shape:
self.X = np.zeros((batch_size, crop_shape[0], crop_shape[1], 4), dtype='float32')
# edge
# self.X2 = np.zeros((batch_size, crop_shape[1], crop_shape[0], 3), dtype='float32')
self.Y1 = np.zeros((batch_size, crop_shape[0] // 4, crop_shape[1] // 4, self.n_classes), dtype='float32')
def on_epoch_end(self):
# Shuffle dataset for next epoch
c = list(zip(self.image_path_list, self.label_path_list, self.edge_path_list))
random.shuffle(c)
self.image_path_list, self.label_path_list, self.edge_path_list = zip(*c)
# Fix memory leak (tensorflow.python.keras bug)
gc.collect()
def __getitem__(self, index):
for n, (image_path, label_path,edge_path) in enumerate(
zip(self.image_path_list[index * self.batch_size:(index + 1) * self.batch_size],
self.label_path_list[index * self.batch_size:(index + 1) * self.batch_size],
self.edge_path_list[index * self.batch_size:(index + 1) * self.batch_size])):
image = cv2.imread(image_path, 1)
label = cv2.imread(label_path, 0)
edge = cv2.imread(edge_path, 0)
....
self.X[n] = image
self.Y1[n] = to_categorical(cv2.resize(label, (label.shape[1] // 4, label.shape[0] // 4)),
self.n_classes).reshape((label.shape[0] // 4, label.shape[1] // 4, -1))
self.Y2[n] = to_categorical(cv2.resize(label, (label.shape[1] // 8, label.shape[0] // 8)),
self.n_classes).reshape((label.shape[0] // 8, label.shape[1] // 8, -1))
self.Y3[n] = to_categorical(cv2.resize(label, (label.shape[1] // 16, label.shape[0] // 16)),
self.n_classes).reshape((label.shape[0] // 16, label.shape[1] // 16, -1))
return self.X, [self.Y1, self.Y2, self.Y3]
def __len__(self):
return math.floor(len(self.image_path_list) / self.batch_size)
def random_crop(image, edge, label, random_crop_size=(800, 1600)):
....
return image, label
错误是:
742/743 [============================>.] - ETA: 0s - loss: 1.8465 - conv6_cls_loss: 1.1261 - sub24_out_loss: 1.2478 - sub4_out_loss: 1.3827 - conv6_cls_categorical_accuracy: 0.6705 - sub24_out_categorical_accuracy: 0.6250 - sub4_out_categorical_accuracy: 0.5963Traceback (most recent call last):
File "/home/user/Desktop/Keras-ICNet/train1.py", line 75, in <module>
use_multiprocessing=True, shuffle=True, max_queue_size=10, initial_epoch=opt.epoch)
File "/home/user/.local/lib/python3.6/site-packages/tensorflow/python/keras/engine/training.py", line 1433, in fit_generator
steps_name='steps_per_epoch')
File "/home/user/.local/lib/python3.6/site-packages/tensorflow/python/keras/engine/training_generator.py", line 322, in model_iteration
steps_name='validation_steps')
File "/home/user/.local/lib/python3.6/site-packages/tensorflow/python/keras/engine/training_generator.py", line 144, in model_iteration
shuffle=shuffle)
File "/home/user/.local/lib/python3.6/site-packages/tensorflow/python/keras/engine/training_generator.py", line 480, in convert_to_generator_like
num_samples = int(nest.flatten(data)[0].shape[0])
AttributeError: 'int' object has no attribute 'shape'
推荐答案
查看堆栈跟踪,
num_samples = int(nest.flatten(data)[0].shape[0])
AttributeError: 'int' object has no attribute 'shape'
data
实际上是指fit_generator
中传递的validation_data
参数.应该是生成器或元组.我猜这是作为数组传递的,结果nest.flatten(data)[0]
返回一个int
并因此返回错误.
The data
actually refers to the validation_data
parameter passed in fit_generator
. This is supposed to be a generator or tuple. My guess is this is passed as an array as a result of which nest.flatten(data)[0]
returns an int
and hence the error.
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