ConstructorError: could not determine a constructor for the tag 'tag:yaml.org,2002:python/tuple'

[lijinzemmm]

Hi , I run generate_tsv.py to generate pretrained features,but i meet a problem.

here is the problem :
**Process Process-1:
Traceback (most recent call last):
File "/usr/lib/python2.7/multiprocessing/process.py", line 258, in _bootstrap
self.run()
File "/usr/lib/python2.7/multiprocessing/process.py", line 114, in run
self._target(*self._args, self._kwargs)
File "generate_tsv.py", line 157, in generate_tsv
net = caffe.Net(prototxt, caffe.TRAIN, weights=weights)
File "/home/lijinze/bottom-up-attention-master/tools/../lib/rpn/anchor_target_layer.py", line 27, in setup
layer_params = yaml.load(self.param_str)
File "/usr/local/lib/python2.7/dist-packages/yaml/init.py", line 72, in load
return loader.get_single_data()
File "/usr/local/lib/python2.7/dist-packages/yaml/constructor.py", line 39, in get_single_data
return self.construct_document(node)
File "/usr/local/lib/python2.7/dist-packages/yaml/constructor.py", line 48, in construct_document
for dummy in generator:
File "/usr/local/lib/python2.7/dist-packages/yaml/constructor.py", line 398, in construct_yaml_map
value = self.construct_mapping(node)
File "/usr/local/lib/python2.7/dist-packages/yaml/constructor.py", line 208, in construct_mapping
return BaseConstructor.construct_mapping(self, node, deep=deep)
File "/usr/local/lib/python2.7/dist-packages/yaml/constructor.py", line 133, in construct_mapping
value = self.construct_object(value_node, deep=deep)
File "/usr/local/lib/python2.7/dist-packages/yaml/constructor.py", line 88, in construct_object
data = constructor(self, node)
File "/usr/local/lib/python2.7/dist-packages/yaml/constructor.py", line 414, in construct_undefined
node.start_mark)
ConstructorError: could not determine a constructor for the tag 'tag:yaml.org,2002:python/tuple'
in "", line 2, column 11:
'scales': !!python/tuple [4, 8, 16, 32]

Could you do me a favor?Thank you very much!