python-3.x - 我在使用 Random Search Keras Tuner 进行优化时遇到运行时错误
问题描述
我使用 Keras 调谐器对数字识别器数据集进行超参数调优，但
首先出现错误我在 CNNHyperModel 类中创建了构建方法以进行超参数调优第二次我使用 Conv2D、MaxPooling2D、Dropout 然后神经网络我已经导入了该程序所需的库
class CNNHyperModel(HyperModel):
#def __init__(self, input_shape, num_classes):
#self.input_shape =input_shape
#self.num_classes =num_classes
def build(self,hp) :
model=keras.Sequential()
model.add( Conv2D(filters=hp.Choice('1Conv_num_classes',
values=[32,64,128,256]),
activation="relu",strides=1,padding='same', kernal_size=(3,3),input_shape=(28,28,1))
)
model.add(Conv2D(filters=hp.Choice("2Conv_num_classes",
values=[32,54,128,256]),
activation='relu',strides=1,padding='same',kernal_size=(3,3)))
model.add(MaxPooling2D(pool_size=(2,2)))
model.add(Dropout(rate=hp.Float("1Dropout",min_value=0.0,
max_value=0.5,step=0.05)))
model.add(Conv2D(filters=hp.Choice("3Conv_num_classes",
values=[32,64,128,256]),
activation='relu',strides=1,padding='same',kernal_size=(3,3)))
model.add(Conv2D(filters=hp.Choice("4Conv_num_classes",
values=[32,64,128,256]),
activation='relu',strides=1,padding='same',kernal_size=(3,3)))
model.add(MaxPooling2D(pool_size=(2,2),strides=(2,2)))
model.add(DropOut(rate=hp.Float("2Dropout", min_value=0.0,
max_value=0.5,step=0.05)))
model.add(Conv2d(filters=hp.Choice("5Conv_num_classes",
values=[32,64,128,256]),
activation='relu',strides=1,padding='same',kernal_size=(3,3)))
model.add(Conv2D(filters=hp.Choice("6Conv_NUM_CLASSES",
values=[32,64,128,256]),
activation='relu',strides=1,padding='same',kernal_size=(3,3)))
model.add(MaxPooling2D(pool_size=(2,2),strides=(2,2)))
model.add(Dropout(rate=hp.Float("3Dropout",min_value=0.0,
max_value=0.5,step=0.05)))
model.add(Flatten())
model.add(Dense(units=hp.Int("Dense",min_value=32,
max_value=512,step=32),activation='relu'))
model.add(Dropout(rate=hp.Float("Dense_Dropout",min_value=0.0,
max_value=0.5,step=0.05)))
model.add(Dense(units=hp.Int("2Dense",min_values=32,
max_values=512,step=32),activation='relu'))
model.add(Dropout(rate=hp.Float("2Dense_Dropout",min_value=0.0,
max_value=0.5,step=0.05)))
model.add(Dense(10,activation='sigmoid'))
"""model.compile(optimizer=keras.optimizers.Adam(
hp.Float(
"Learning_rate",
min_value=le-4,
max_value=le-2,
sampling="LOG"
)
),"""
model.compie(optimizer="sgd",loss="sparse_categorical_crossentropy",metrics=['accuracy'])
return model
#hypermodel=CNNHyperModel((28,28,1),10)
hypermodel=CNNHyperModel()
tuner = RandomSearch(
hypermodel,
objective='accuracy',
max_trials=15,executions_per_trial=3,directory='my_dir',
project_name='digit'
)
但我得到了 RuntimeError
Traceback (most recent call last):
File "/usr/local/lib/python3.7/dist-packages/kerastuner/engine/hypermodel.py", line 104, in build
model = self.hypermodel.build(hp)
File "/usr/local/lib/python3.7/dist-packages/kerastuner/engine/hypermodel.py", line 64, in _build_wrapper
return self._build(hp, *args, **kwargs)
File "<ipython-input-17-9b2a20a37331>", line 10, in build
activation="relu",strides=1,padding='same', kernal_size=(3,3),input_shape=(28,28,1))
TypeError: __init__() missing 1 required positional argument: 'kernel_size'
Traceback (most recent call last):
File "/usr/local/lib/python3.7/dist-packages/kerastuner/engine/hypermodel.py", line 104, in build
model = self.hypermodel.build(hp)
File "/usr/local/lib/python3.7/dist-packages/kerastuner/engine/hypermodel.py", line 64, in _build_wrapper
return self._build(hp, *args, **kwargs)
File "<ipython-input-17-9b2a20a37331>", line 10, in build
activation="relu",strides=1,padding='same', kernal_size=(3,3),input_shape=(28,28,1))
TypeError: __init__() missing 1 required positional argument: 'kernel_size'
Traceback (most recent call last):
File "/usr/local/lib/python3.7/dist-packages/kerastuner/engine/hypermodel.py", line 104, in build
model = self.hypermodel.build(hp)
File "/usr/local/lib/python3.7/dist-packages/kerastuner/engine/hypermodel.py", line 64, in _build_wrapper
return self._build(hp, *args, **kwargs)
File "<ipython-input-17-9b2a20a37331>", line 10, in build
activation="relu",strides=1,padding='same', kernal_size=(3,3),input_shape=(28,28,1))
TypeError: __init__() missing 1 required positional argument: 'kernel_size'
Invalid model 0/5
Invalid model 1/5
Invalid model 2/5
Invalid model 3/5
Invalid model 4/5
Invalid model 5/5
Traceback (most recent call last):
File "/usr/local/lib/python3.7/dist-packages/kerastuner/engine/hypermodel.py", line 104, in build
model = self.hypermodel.build(hp)
File "/usr/local/lib/python3.7/dist-packages/kerastuner/engine/hypermodel.py", line 64, in _build_wrapper
return self._build(hp, *args, **kwargs)
File "<ipython-input-17-9b2a20a37331>", line 10, in build
activation="relu",strides=1,padding='same', kernal_size=(3,3),input_shape=(28,28,1))
TypeError: __init__() missing 1 required positional argument: 'kernel_size'
Traceback (most recent call last):
File "/usr/local/lib/python3.7/dist-packages/kerastuner/engine/hypermodel.py", line 104, in build
model = self.hypermodel.build(hp)
File "/usr/local/lib/python3.7/dist-packages/kerastuner/engine/hypermodel.py", line 64, in _build_wrapper
return self._build(hp, *args, **kwargs)
File "<ipython-input-17-9b2a20a37331>", line 10, in build
activation="relu",strides=1,padding='same', kernal_size=(3,3),input_shape=(28,28,1))
TypeError: __init__() missing 1 required positional argument: 'kernel_size'
Traceback (most recent call last):
File "/usr/local/lib/python3.7/dist-packages/kerastuner/engine/hypermodel.py", line 104, in build
model = self.hypermodel.build(hp)
File "/usr/local/lib/python3.7/dist-packages/kerastuner/engine/hypermodel.py", line 64, in _build_wrapper
return self._build(hp, *args, **kwargs)
File "<ipython-input-17-9b2a20a37331>", line 10, in build
activation="relu",strides=1,padding='same', kernal_size=(3,3),input_shape=(28,28,1))
TypeError: __init__() missing 1 required positional argument: 'kernel_size'
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
/usr/local/lib/python3.7/dist-packages/kerastuner/engine/hypermodel.py in build(self, hp)
103 with maybe_distribute(self.distribution_strategy):
--> 104 model = self.hypermodel.build(hp)
105 except:
9 frames
TypeError: __init__() missing 1 required positional argument: 'kernel_size'
During handling of the above exception, another exception occurred:
RuntimeError Traceback (most recent call last)
/usr/local/lib/python3.7/dist-packages/kerastuner/engine/hypermodel.py in build(self, hp)
111 if i == self._max_fail_streak:
112 raise RuntimeError(
--> 113 'Too many failed attempts to build model.')
114 continue
115
RuntimeError: Too many failed attempts to build model.
解决方案
内核大小应该是 3x3 而不是 3 。即 kernel_size=(3,3) 。内核是一个矩阵，而不是一个数字。
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