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[英]AttributeError: 'Tensor' object has no attribute 'numpy
[英]AttributeError: 'Tensor' object has no attribute 'numpy'
如何修复此错误我从 GitHub 下载了此代码。
predicted_id = tf.multinomial(tf.exp(predictions), num_samples=1)[0][0].numpy()
抛出错误
AttributeError: 'Tensor' object has no attribute 'numpy'
请帮我解决这个问题!
我用了:
sess = tf.Session()
with sess.as_default():
predicted_id = tf.multinomial(tf.exp(predictions), num_samples=1)[0][0].eval()
我得到这个错误。 有人帮助我,我只是想让它工作,为什么这么难?
D:\Python>python TextGenOut.py
File "TextGenOut.py", line 72
predicted_id = tf.multinomial(tf.exp(predictions), num_samples=1)[0][0].eval()
^
IndentationError: unexpected indent
D:\Python>python TextGenOut.py
2018-09-16 21:50:57.008663: I T:\src\github\tensorflow\tensorflow\core\platform\cpu_feature_guard.cc:141] Your CPU supports instructions that this TensorFlow binary was not compiled to use: AVX2
2018-09-16 21:50:57.272973: W T:\src\github\tensorflow\tensorflow\core\framework\op_kernel.cc:1275] OP_REQUIRES failed at resource_variable_ops.cc:480 : Not found: Container localhost does not exist. (Could not find resource: localhost/model/embedding/embeddings)
Traceback (most recent call last):
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\client\session.py", line 1278, in _do_call
return fn(*args)
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\client\session.py", line 1263, in _run_fn
options, feed_dict, fetch_list, target_list, run_metadata)
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\client\session.py", line 1350, in _call_tf_sessionrun
run_metadata)
tensorflow.python.framework.errors_impl.FailedPreconditionError: Error while reading resource variable model/dense/kernel from Container: localhost. This could mean that the variable was uninitialized. Not found: Container localhost does not exist. (Could not find resource: localhost/model/dense/kernel)
[[Node: model/dense/MatMul/ReadVariableOp = ReadVariableOp[dtype=DT_FLOAT, _device="/job:localhost/replica:0/task:0/device:CPU:0"](model/dense/kernel)]]
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "TextGenOut.py", line 72, in <module>
predicted_id = tf.multinomial(tf.exp(predictions), num_samples=1)[0][0].eval()
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\framework\ops.py", line 680, in eval
return _eval_using_default_session(self, feed_dict, self.graph, session)
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\framework\ops.py", line 4951, in _eval_using_default_session
return session.run(tensors, feed_dict)
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\client\session.py", line 877, in run
run_metadata_ptr)
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\client\session.py", line 1100, in _run
feed_dict_tensor, options, run_metadata)
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\client\session.py", line 1272, in _do_run
run_metadata)
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\client\session.py", line 1291, in _do_call
raise type(e)(node_def, op, message)
tensorflow.python.framework.errors_impl.FailedPreconditionError: Error while reading resource variable model/dense/kernel from Container: localhost. This could mean that the variable was uninitialized. Not found: Container localhost does not exist. (Could not find resource: localhost/model/dense/kernel)
[[Node: model/dense/MatMul/ReadVariableOp = ReadVariableOp[dtype=DT_FLOAT, _device="/job:localhost/replica:0/task:0/device:CPU:0"](model/dense/kernel)]]
Caused by op 'model/dense/MatMul/ReadVariableOp', defined at:
File "TextGenOut.py", line 66, in <module>
predictions, hidden = model(input_eval, hidden)
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\keras\engine\base_layer.py", line 736, in __call__
outputs = self.call(inputs, *args, **kwargs)
File "TextGenOut.py", line 39, in call
x = self.fc(output)
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\keras\engine\base_layer.py", line 736, in __call__
outputs = self.call(inputs, *args, **kwargs)
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\keras\layers\core.py", line 943, in call
outputs = gen_math_ops.mat_mul(inputs, self.kernel)
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\ops\gen_math_ops.py", line 4750, in mat_mul
name=name)
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\framework\op_def_library.py", line 510, in _apply_op_helper
preferred_dtype=default_dtype)
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\framework\ops.py", line 1094, in internal_convert_to_tensor
ret = conversion_func(value, dtype=dtype, name=name, as_ref=as_ref)
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\ops\resource_variable_ops.py", line 1045, in _dense_var_to_tensor
return var._dense_var_to_tensor(dtype=dtype, name=name, as_ref=as_ref) # pylint: disable=protected-access
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\ops\resource_variable_ops.py", line 1000, in _dense_var_to_tensor
return self.value()
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\ops\resource_variable_ops.py", line 662, in value
return self._read_variable_op()
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\ops\resource_variable_ops.py", line 745, in _read_variable_op
self._dtype)
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\ops\gen_resource_variable_ops.py", line 562, in read_variable_op
"ReadVariableOp", resource=resource, dtype=dtype, name=name)
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\framework\op_def_library.py", line 787, in _apply_op_helper
op_def=op_def)
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\util\deprecation.py", line 454, in new_func
return func(*args, **kwargs)
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\framework\ops.py", line 3155, in create_op
op_def=op_def)
File "C:\Users\fried\AppData\Roaming\Python\Python36\site-packages\tensorflow\python\framework\ops.py", line 1717, in __init__
self._traceback = tf_stack.extract_stack()
FailedPreconditionError (see above for traceback): Error while reading resource variable model/dense/kernel from Container: localhost. This could mean that the variable was uninitialized. Not found: Container localhost does not exist. (Could not find resource: localhost/model/dense/kernel)
[[Node: model/dense/MatMul/ReadVariableOp = ReadVariableOp[dtype=DT_FLOAT, _device="/job:localhost/replica:0/task:0/device:CPU:0"](model/dense/kernel)]]
我怀疑你复制代码的地方启用了急切执行,即在程序开始时调用了tf.enable_eager_execution()
。
你也可以这样做。 希望有帮助。
更新:请注意,在 TensorFlow 2.0 中默认启用 Eager Execution。 所以上面的答案只适用于 TensorFlow 1.x
由于接受的答案并没有解决我的问题,所以我认为这可能对一些面临问题并且已经拥有 tensorflow 版本 >= 2.2.0 并启用了急切执行的人有所帮助。
问题似乎是在拟合model.fit()
期间的某些函数中, @tf.function
装饰器出于性能原因禁止执行tensor.numpy()
等函数。
我的解决方案是将标志run_eagerly=True
传递给model.compile()
如下所示:
model.compile(..., run_eagerly=True)
如果您的代码包含在 @tf.function 或 Keras 层中,则这也可能发生在 TF2.0 中。 两者都以图形模式运行。 那里有很多秘密损坏的代码,因为急切模式和图形模式之间的行为不同,人们不知道他们正在切换上下文,所以要小心!
它发生在旧版本的 TF 中。 所以尝试pip install tensorflow --upgrade
否则运行
import tensorflow as tf
tf.enable_eager_execution()
如果您使用的是 Jupyter notebook,请重新启动内核。
Tensorflow 2 有一个配置选项来“热切地”运行函数,这将允许通过.numpy()
方法获取 Tensor 值。 要启用急切执行,请使用以下命令:
tf.config.run_functions_eagerly(True)
请注意,这主要用于调试。
另见: https : //www.tensorflow.org/api_docs/python/tf/config/run_functions_eagerly
tf.multinomial
返回一个 Tensor 对象,该对象包含一个带有形状[batch_size, num_samples]
绘制样本的 2D 列表。 对该张量对象调用.eval()
预计会返回一个 numpy ndarray。
像这样的东西:
predicted_id = tf.multinomial(tf.exp(predictions), num_samples=1)[0][0].eval()
您还需要确保会话处于活动状态(否则没有多大意义):
sess = tf.Session()
with sess.as_default():
predicted_id = tf.multinomial(tf.exp(predictions), num_samples=1)[0][0].eval()
当我运行如下代码时,我看到了类似的错误,
tensor = tf.multiply(ndarray, 42)
tensor.numpy() # throw AttributeError: 'Tensor' object has no attribute 'numpy'
我将 anaconda 3 与 tensorflow 1.14.0 一起使用。 我使用以下命令升级了 tensorflow
conda update tensorflow
现在 tensorflow 是 2.0.0,问题已修复。 试试这个,看看它是否能解决你的问题。
我有同样的问题在tf.function():但是什么工作对我来说是对numpy的阵列转换成tensorflow张通过tf.convert_to_tensor
铜工,然后用tensorflow继续。 也许这个技巧对任何人都有用......
对于在 TF 2.0.0 中仍然存在此问题的人,请运行: tf.config.run_functions_eagerly(True) top of ur program 它完美运行!
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