UnicodeDecodeError: 'rawunicodeescape' codec can't decode bytes in position 80-81: truncated \UXXX

一、环境

• windows 7
• python3.6（Anaconda3）
• keras 2 api

二、模型保存遇到了这个问题

保存部分代码如下：

model_name = 'ssd7_0'model.save("ssd7_0.h5")model.save_weights(r'ssd7_0_weights.h5')

然后运行就遇到了这个问题：

---------------------------------------------------------------------------UnicodeDecodeError                        Traceback (most recent call last)<ipython-input-31-bd7fdea3d294> in <module>()      1 model_name = 'ssd7_0'----> 2 model.save("ssd7_0.h5")      3 model.save_weights(r'ssd7_0_weights.h5')      4       5 print()D:\Software\Anaconda3\lib\site-packages\keras\engine\topology.py in save(self, filepath, overwrite, include_optimizer)   2551         """   2552         from ..models import save_model-> 2553         save_model(self, filepath, overwrite, include_optimizer)   2554    2555     def save_weights(self, filepath, overwrite=True):D:\Software\Anaconda3\lib\site-packages\keras\models.py in save_model(model, filepath, overwrite, include_optimizer)    105         f.attrs['model_config'] = json.dumps({    106             'class_name': model.__class__.__name__,--> 107             'config': model.get_config()    108         }, default=get_json_type).encode('utf8')    109 D:\Software\Anaconda3\lib\site-packages\keras\engine\topology.py in get_config(self)   2324         for layer in self.layers:  # From the earliest layers on.   2325             layer_class_name = layer.__class__.__name__-> 2326             layer_config = layer.get_config()   2327             filtered_inbound_nodes = []   2328             for original_node_index, node in enumerate(layer.inbound_nodes):D:\Software\Anaconda3\lib\site-packages\keras\layers\core.py in get_config(self)    657     def get_config(self):    658         if isinstance(self.function, python_types.LambdaType):--> 659             function = func_dump(self.function)    660             function_type = 'lambda'    661         else:D:\Software\Anaconda3\lib\site-packages\keras\utils\generic_utils.py in func_dump(func)    173         A tuple `(code, defaults, closure)`.    174     """--> 175     code = marshal.dumps(func.__code__).decode('raw_unicode_escape')    176     defaults = func.__defaults__    177     if func.__closure__:UnicodeDecodeError: 'rawunicodeescape' codec can't decode bytes in position 80-81: truncated \UXXXXXXXX escape

三、解决方法

这是一个系统相关的问题，windows路径不兼容。keras的github有好几个这个错误的issue，stack overflow上也有这个问题。参考：

github issue

stack overflow

按照里面的方法修改了keras源码，然后重新启动ipython notebook，保存成功。然而代价是重新训练了一遍。。。

修改方法就是：在D:\Software\Anaconda3\Lib\site-packages\keras\utils\generic_utils.py中，修改第175行代码：

#code = marshal.dumps(func.code).decode('raw_unicode_escape')code = marshal.dumps(func.code).replace(b'\\',b'/').decode('raw_unicode_escape')