Python 如何获得估计器。预测对一个样本进行预测
我正试图让一个mnist cnn工作,以便一次对一张图片进行预测。我已使用tensorflow教程代码,并尝试使用estimator.predict模型,但目前得到的错误是:Python 如何获得估计器。预测对一个样本进行预测,python,tensorflow,Python,Tensorflow,我正试图让一个mnist cnn工作,以便一次对一张图片进行预测。我已使用tensorflow教程代码,并尝试使用estimator.predict模型,但目前得到的错误是: InvalidArgumentError (see above for traceback): Input to reshape is a tensor with 1 values, but the requested shape requires a multiple of 784 [[Node: Reshape =
InvalidArgumentError (see above for traceback): Input to reshape is a tensor with 1 values, but the requested shape requires a multiple of 784
[[Node: Reshape = Reshape[T=DT_FLOAT, Tshape=DT_INT32, _device="/job:localhost/replica:0/task:0/device:GPU:0"](fifo_queue_DequeueUpTo/_53, Reshape/shape)]]
如果我打印给predict input函数的predict_数据列表,它包含784个元素
模型训练合格,评估合格。
模型已经过培训,因此我跳过了此处的培训代码,但我得到的是:
def main(unused_argv):
# Load training and eval data
mnist = tf.contrib.learn.datasets.load_dataset("mnist")
train_data = mnist.train.images # Returns np.array
train_labels = np.asarray(mnist.train.labels, dtype=np.int32)
eval_data = mnist.test.images # Returns np.array
eval_labels = np.asarray(mnist.test.labels, dtype=np.int32)
# Create the Estimator
mnist_classifier = tf.estimator.Estimator(
model_fn=cnn_model_fn, model_dir="/tmp/mnist_convnet_model")
# Set up logging for predictions
# Log the values in the "Softmax" tensor with label "probabilities"
tensors_to_log = {"probabilities": "softmax_tensor"}
logging_hook = tf.train.LoggingTensorHook(
tensors=tensors_to_log, every_n_iter=50)
# # Train the model
# train_input_fn = tf.estimator.inputs.numpy_input_fn(
# x={"x": train_data},
# y=train_labels,
# batch_size=100,
# num_epochs=None,
# shuffle=True)
# mnist_classifier.train(
# input_fn=train_input_fn,
# steps=20000,
# hooks=[logging_hook])
# Evaluate the model and print results
# eval_input_fn = tf.estimator.inputs.numpy_input_fn(
# x={"x": eval_data},
# y=eval_labels,
# num_epochs=1,
# shuffle=False)
# eval_results = mnist_classifier.evaluate(input_fn=eval_input_fn)
# print(eval_results)
predict_data = eval_data[1]
predict_input_fn = tf.estimator.inputs.numpy_input_fn(
x={"x": predict_data},
y=None,
batch_size=1,
num_epochs=1,
shuffle=False,
num_threads=1)
predict_results = mnist_classifier.predict(predict_input_fn)
print(predict_data)
for idx, prediction in enumerate(predict_results):
print(idx)
# print(prediction)
任何帮助这项工作将不胜感激
更新:我尝试按照下面的建议重塑,但得到了相同的错误。完整跟踪是:
Traceback (most recent call last):
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\tensorflow\python\client\session.py", line 1323, in _do_call
return fn(*args)
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\tensorflow\python\client\session.py", line 1302, in _run_fn
status, run_metadata)
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\tensorflow\python\framework\errors_impl.py", line 473, in __exit__
c_api.TF_GetCode(self.status.status))
tensorflow.python.framework.errors_impl.InvalidArgumentError: Input to reshape is a tensor with 1 values, but the requested shape requires a multiple of 784
[[Node: Reshape = Reshape[T=DT_FLOAT, Tshape=DT_INT32, _device="/job:localhost/replica:0/task:0/device:GPU:0"](fifo_queue_DequeueUpTo/_53, Reshape/shape)]]
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "D:\Workspace\eclipse\mnist_cnn\cnn_mnist.py", line 180, in <module>
tf.app.run()
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\tensorflow\python\platform\app.py", line 48, in run
_sys.exit(main(_sys.argv[:1] + flags_passthrough))
File "D:\Workspace\eclipse\mnist_cnn\cnn_mnist.py", line 170, in main
for idx, prediction in enumerate(predict_results):
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\tensorflow\python\estimator\estimator.py", line 420, in predict
preds_evaluated = mon_sess.run(predictions)
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\tensorflow\python\training\monitored_session.py", line 521, in run
run_metadata=run_metadata)
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\tensorflow\python\training\monitored_session.py", line 892, in run
run_metadata=run_metadata)
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\tensorflow\python\training\monitored_session.py", line 967, in run
raise six.reraise(*original_exc_info)
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\six.py", line 693, in reraise
raise value
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\tensorflow\python\training\monitored_session.py", line 952, in run
return self._sess.run(*args, **kwargs)
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\tensorflow\python\training\monitored_session.py", line 1024, in run
run_metadata=run_metadata)
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\tensorflow\python\training\monitored_session.py", line 827, in run
return self._sess.run(*args, **kwargs)
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\tensorflow\python\client\session.py", line 889, in run
run_metadata_ptr)
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\tensorflow\python\client\session.py", line 1120, in _run
feed_dict_tensor, options, run_metadata)
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\tensorflow\python\client\session.py", line 1317, in _do_run
options, run_metadata)
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\tensorflow\python\client\session.py", line 1336, in _do_call
raise type(e)(node_def, op, message)
tensorflow.python.framework.errors_impl.InvalidArgumentError: Input to reshape is a tensor with 1 values, but the requested shape requires a multiple of 784
[[Node: Reshape = Reshape[T=DT_FLOAT, Tshape=DT_INT32, _device="/job:localhost/replica:0/task:0/device:GPU:0"](fifo_queue_DequeueUpTo/_53, Reshape/shape)]]
Caused by op 'Reshape', defined at:
File "D:\Workspace\eclipse\mnist_cnn\cnn_mnist.py", line 180, in <module>
tf.app.run()
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\tensorflow\python\platform\app.py", line 48, in run
_sys.exit(main(_sys.argv[:1] + flags_passthrough))
File "D:\Workspace\eclipse\mnist_cnn\cnn_mnist.py", line 170, in main
for idx, prediction in enumerate(predict_results):
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\tensorflow\python\estimator\estimator.py", line 411, in predict
features, None, model_fn_lib.ModeKeys.PREDICT, self.config)
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\tensorflow\python\estimator\estimator.py", line 694, in _call_model_fn
model_fn_results = self._model_fn(features=features, **kwargs)
File "D:\Workspace\eclipse\mnist_cnn\cnn_mnist.py", line 31, in cnn_model_fn
input_layer = tf.reshape(features["x"], [-1, 28, 28, 1])
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\tensorflow\python\ops\gen_array_ops.py", line 3937, in reshape
"Reshape", tensor=tensor, shape=shape, name=name)
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\tensorflow\python\framework\op_def_library.py", line 787, in _apply_op_helper
op_def=op_def)
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\tensorflow\python\framework\ops.py", line 2956, in create_op
op_def=op_def)
File "C:\Users\artma\Miniconda3\envs\vpilot\lib\site-packages\tensorflow\python\framework\ops.py", line 1470, in __init__
self._traceback = self._graph._extract_stack() # pylint: disable=protected-access
InvalidArgumentError (see above for traceback): Input to reshape is a tensor with 1 values, but the requested shape requires a multiple of 784
[[Node: Reshape = Reshape[T=DT_FLOAT, Tshape=DT_INT32, _device="/job:localhost/replica:0/task:0/device:GPU:0"](fifo_queue_DequeueUpTo/_53, Reshape/shape)]]
回溯(最近一次呼叫最后一次):
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\tensorflow\python\client\session.py”,第1323行,在调用中
返回fn(*args)
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\tensorflow\python\client\session.py”,第1302行,在\u run\u fn中
状态,运行(元数据)
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\tensorflow\python\framework\errors\u impl.py”,第473行,在退出中__
c_api.TF_GetCode(self.status.status))
tensorflow.python.framework.errors\u impl.InvalidArgumentError:重塑的输入是一个值为1的张量,但请求的形状需要784的倍数
[[Node:Reforme=Reforme[T=DT_FLOAT,Tshape=DT_INT32,_device=“/job:localhost/replica:0/task:0/device:GPU:0”](fifo_queue\u DequeueUpTo/_53,Reforme/shape)]]
在处理上述异常期间,发生了另一个异常:
回溯(最近一次呼叫最后一次):
文件“D:\Workspace\eclipse\mnist\u cnn\cnn\u mnist.py”,第180行,在
tf.app.run()
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\tensorflow\python\platform\app.py”,第48行,正在运行
_系统出口(主(_sys.argv[:1]+标志_passthrough))
文件“D:\Workspace\eclipse\mnist\u cnn\cnn\u mnist.py”,第170行,在main中
对于idx,枚举中的预测(预测结果):
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\tensorflow\python\estimator\estimator.py”,第420行,在predict中
评估的预测值=运行(预测值)
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\tensorflow\python\training\monitored\u session.py”,第521行,正在运行
运行\元数据=运行\元数据)
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\tensorflow\python\training\monitored\u session.py”,第892行,正在运行
运行\元数据=运行\元数据)
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\tensorflow\python\training\monitored\u session.py”,第967行,正在运行
提出六个。重新提出(*原始交换信息)
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\six.py”,第693行,重新登录
增值
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\tensorflow\python\training\monitored\u session.py”,第952行,正在运行
返回自运行(*args,**kwargs)
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\tensorflow\python\training\monitored\u session.py”,第1024行,正在运行
运行\元数据=运行\元数据)
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\tensorflow\python\training\monitored\u session.py”,第827行,正在运行
返回自运行(*args,**kwargs)
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\tensorflow\python\client\session.py”,第889行,正在运行
运行_元数据_ptr)
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\tensorflow\python\client\session.py”,第1120行,正在运行
feed_dict_tensor、options、run_元数据)
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\tensorflow\python\client\session.py”,第1317行,在运行中
选项,运行(元数据)
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\tensorflow\python\client\session.py”,第1336行,在调用中
提升类型(e)(节点定义、操作、消息)
tensorflow.python.framework.errors\u impl.InvalidArgumentError:重塑的输入是一个值为1的张量,但请求的形状需要784的倍数
[[Node:Reforme=Reforme[T=DT_FLOAT,Tshape=DT_INT32,_device=“/job:localhost/replica:0/task:0/device:GPU:0”](fifo_queue\u DequeueUpTo/_53,Reforme/shape)]]
由op“重塑”引起,定义为:
文件“D:\Workspace\eclipse\mnist\u cnn\cnn\u mnist.py”,第180行,在
tf.app.run()
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\tensorflow\python\platform\app.py”,第48行,正在运行
_系统出口(主(_sys.argv[:1]+标志_passthrough))
文件“D:\Workspace\eclipse\mnist\u cnn\cnn\u mnist.py”,第170行,在main中
对于idx,枚举中的预测(预测结果):
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\tensorflow\python\estimator\estimator.py”,第411行,在predict中
功能,无,模型\u fn\u lib.ModeKeys.PREDICT,self.config)
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\tensorflow\python\estimator\estimator.py”,第694行,在调用模型fn中
模型\结果=自身。\模型\结果(特征=特征,**kwargs)
文件“D:\Workspace\eclipse\mnist\u cnn\cnn\u mnist.py”,第31行,cnn\u model\u fn
输入层=tf.重塑(特征[“x”],[-1,28,28,1])
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\tensorflow\python\ops\gen\u array\u ops.py”,第3937行,在“重塑”中
“重塑”,张量=张量,形状=形状,名称=名称)
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\tensorflow\python\framework\op_def_library.py”,第787行,位于“应用\u op_helper”中
op_def=op_def)
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\tensorflow\python\framework\ops.py”,第2956行,在create\u op中
op_def=op_def)
文件“C:\Users\artma\Miniconda3\envs\vpilot\lib\site packages\tensorflow\python\framework\ops.py”,第1470行,在uu init中__
self._traceback=self._graph._extract_stack()35; pylint:disable=protected access
InvalidArgumentError(回溯见上文):重塑的输入是一个具有1个值的张量,但为请求的形状
predict_data = eval_data[1]
predict_data = eval_data[1:2]