The issue about breakout_a3c.py in 3-atari, when i execute source

[rhkatjd00]

PC1
cpu: intel i-5
no graphic card
python 3.5
tensorflow 1.14
keras 2.3.0

PC2
cpu: inter i-7
rtx-2070
python 3.5
tensorflow 1.14
keras 2.3.0

When i execute breakout_a3c.py ,
The following problem occurs on both computers
I guess that the issue is related to threading library...

Model: "model_18"

Layer (type) Output Shape Param #
input_9 (InputLayer) (None, 84, 84, 4) 0

conv2d_17 (Conv2D) (None, 20, 20, 16) 4112

conv2d_18 (Conv2D) (None, 9, 9, 32) 8224

flatten_9 (Flatten) (None, 2592) 0

dense_25 (Dense) (None, 256) 663808

dense_27 (Dense) (None, 1) 257
Total params: 676,401
Trainable params: 676,401
Non-trainable params: 0

Exception in thread Thread-2:
Traceback (most recent call last):
File "/usr/lib/python3.5/threading.py", line 914, in _bootstrap_inner
self.run()
File "/home/name/AdvRL/reinforcement-learning/3-atari/1-breakout/breakout_a3c.py", line 207, in run
action, policy = self.get_action(history)
File "/home/name/AdvRL/reinforcement-learning/3-atari/1-breakout/breakout_a3c.py", line 327, in get_action
policy = self.local_actor.predict(history)[0]
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/training.py", line 1462, in predict
callbacks=callbacks)
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/training_arrays.py", line 276, in predict_loop
callbacks.model.stop_training = False
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/network.py", line 323, in setattr
super(Network, self).setattr(name, value)
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/base_layer.py", line 1215, in setattr
if not _DISABLE_TRACKING.value:
AttributeError: '_thread._local' object has no attribute 'value'

Exception in thread Thread-3:
Traceback (most recent call last):
File "/usr/lib/python3.5/threading.py", line 914, in _bootstrap_inner
self.run()
File "/home/name/AdvRL/reinforcement-learning/3-atari/1-breakout/breakout_a3c.py", line 207, in run
action, policy = self.get_action(history)
File "/home/name/AdvRL/reinforcement-learning/3-atari/1-breakout/breakout_a3c.py", line 327, in get_action
policy = self.local_actor.predict(history)[0]
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/training.py", line 1462, in predict
callbacks=callbacks)
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/training_arrays.py", line 276, in predict_loop
callbacks.model.stop_training = False
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/network.py", line 323, in setattr
super(Network, self).setattr(name, value)
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/base_layer.py", line 1215, in setattr
if not _DISABLE_TRACKING.value:
AttributeError: '_thread._local' object has no attribute 'value'

Exception in thread Thread-4:
Traceback (most recent call last):
File "/usr/lib/python3.5/threading.py", line 914, in _bootstrap_inner
self.run()
File "/home/name/AdvRL/reinforcement-learning/3-atari/1-breakout/breakout_a3c.py", line 207, in run
action, policy = self.get_action(history)
File "/home/name/AdvRL/reinforcement-learning/3-atari/1-breakout/breakout_a3c.py", line 327, in get_action
policy = self.local_actor.predict(history)[0]
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/training.py", line 1462, in predict
callbacks=callbacks)
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/training_arrays.py", line 276, in predict_loop
callbacks.model.stop_training = False
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/network.py", line 323, in setattr
super(Network, self).setattr(name, value)
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/base_layer.py", line 1215, in setattr
if not _DISABLE_TRACKING.value:
AttributeError: '_thread._local' object has no attribute 'value'

Exception in thread Thread-5:
Traceback (most recent call last):
File "/usr/lib/python3.5/threading.py", line 914, in _bootstrap_inner
self.run()
File "/home/name/AdvRL/reinforcement-learning/3-atari/1-breakout/breakout_a3c.py", line 207, in run
action, policy = self.get_action(history)
File "/home/name/AdvRL/reinforcement-learning/3-atari/1-breakout/breakout_a3c.py", line 327, in get_action
policy = self.local_actor.predict(history)[0]
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/training.py", line 1462, in predict
callbacks=callbacks)
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/training_arrays.py", line 276, in predict_loop
callbacks.model.stop_training = False
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/network.py", line 323, in setattr
super(Network, self).setattr(name, value)
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/base_layer.py", line 1215, in setattr
if not _DISABLE_TRACKING.value:
AttributeError: '_thread._local' object has no attribute 'value'

Exception in thread Thread-6:
Traceback (most recent call last):
File "/usr/lib/python3.5/threading.py", line 914, in _bootstrap_inner
self.run()
File "/home/name/AdvRL/reinforcement-learning/3-atari/1-breakout/breakout_a3c.py", line 207, in run
action, policy = self.get_action(history)
File "/home/name/AdvRL/reinforcement-learning/3-atari/1-breakout/breakout_a3c.py", line 327, in get_action
policy = self.local_actor.predict(history)[0]
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/training.py", line 1462, in predict
callbacks=callbacks)
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/training_arrays.py", line 276, in predict_loop
callbacks.model.stop_training = False
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/network.py", line 323, in setattr
super(Network, self).setattr(name, value)
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/base_layer.py", line 1215, in setattr
if not _DISABLE_TRACKING.value:
AttributeError: '_thread._local' object has no attribute 'value'

Exception in thread Thread-7:
Traceback (most recent call last):
File "/usr/lib/python3.5/threading.py", line 914, in _bootstrap_inner
self.run()
File "/home/name/AdvRL/reinforcement-learning/3-atari/1-breakout/breakout_a3c.py", line 207, in run
action, policy = self.get_action(history)
File "/home/name/AdvRL/reinforcement-learning/3-atari/1-breakout/breakout_a3c.py", line 327, in get_action
policy = self.local_actor.predict(history)[0]
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/training.py", line 1462, in predict
callbacks=callbacks)
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/training_arrays.py", line 276, in predict_loop
callbacks.model.stop_training = False
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/network.py", line 323, in setattr
super(Network, self).setattr(name, value)
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/base_layer.py", line 1215, in setattr
if not _DISABLE_TRACKING.value:
AttributeError: '_thread._local' object has no attribute 'value'

Exception in thread Thread-8:
Traceback (most recent call last):
File "/usr/lib/python3.5/threading.py", line 914, in _bootstrap_inner
self.run()
File "/home/name/AdvRL/reinforcement-learning/3-atari/1-breakout/breakout_a3c.py", line 207, in run
action, policy = self.get_action(history)
File "/home/name/AdvRL/reinforcement-learning/3-atari/1-breakout/breakout_a3c.py", line 327, in get_action
policy = self.local_actor.predict(history)[0]
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/training.py", line 1462, in predict
callbacks=callbacks)
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/training_arrays.py", line 276, in predict_loop
callbacks.model.stop_training = False
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/network.py", line 323, in setattr
super(Network, self).setattr(name, value)
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/base_layer.py", line 1215, in setattr
if not _DISABLE_TRACKING.value:
AttributeError: '_thread._local' object has no attribute 'value'

Exception in thread Thread-9:
Traceback (most recent call last):
File "/usr/lib/python3.5/threading.py", line 914, in _bootstrap_inner
self.run()
File "/home/name/AdvRL/reinforcement-learning/3-atari/1-breakout/breakout_a3c.py", line 207, in run
action, policy = self.get_action(history)
File "/home/name/AdvRL/reinforcement-learning/3-atari/1-breakout/breakout_a3c.py", line 327, in get_action
policy = self.local_actor.predict(history)[0]
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/training.py", line 1462, in predict
callbacks=callbacks)
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/training_arrays.py", line 276, in predict_loop
callbacks.model.stop_training = False
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/network.py", line 323, in setattr
super(Network, self).setattr(name, value)
File "/home/name/.local/lib/python3.5/site-packages/keras/engine/base_layer.py", line 1215, in setattr
if not _DISABLE_TRACKING.value:
AttributeError: '_thread._local' object has no attribute 'value'

[rhkatjd00]

I soved the problem by downgrading keras.
=>
$pip3 install 'keras<2.3.0'