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我有一个包含这样的数据映射文件:改善格式错误的输入格式错误信息?
|labels 0 0 1 0 0 0 |features 0
|labels 1 0 0 0 0 0 |features 2
|labels 0 0 0 1 0 0 |features 3
|labels 0 0 0 0 0 1 |features 7
数据与下面的代码读取到minibatch:
from cntk import Trainer, StreamConfiguration, text_format_minibatch_source, learning_rate_schedule, UnitType
mb_source = text_format_minibatch_source('test_map2.txt', [
StreamConfiguration('features', 1),
StreamConfiguration('labels', num_classes)])
test_minibatch = mb_source.next_minibatch(2)
如果形成不良的输入文件,有时你会得到一个相当神秘的错误信息。例如在输入文件的最后一行的末尾缺少换行符会导致这样的错误:
---------------------------------------------------------------------------
RuntimeError Traceback (most recent call last)
<ipython-input-35-2f1481ccfced> in <module>()
----> 1 test_minibatch = mb_source.next_minibatch(2)
C:\local\Anaconda3-4.1.1-Windows-x86_64\envs\cntk-py34\lib\site-packages\cntk\utils\swig_helper.py in wrapper(*args, **kwds)
56 @wraps(f)
57 def wrapper(*args, **kwds):
---> 58 result = f(*args, **kwds)
59 map_if_possible(result)
60 return result
C:\local\Anaconda3-4.1.1-Windows-x86_64\envs\cntk-py34\lib\site-packages\cntk\io\__init__.py in next_minibatch(self, minibatch_size_in_samples, input_map, device)
159
160 mb = super(MinibatchSource, self).get_next_minibatch(
--> 161 minibatch_size_in_samples, device)
162
163 if input_map:
C:\local\Anaconda3-4.1.1-Windows-x86_64\envs\cntk-py34\lib\site-packages\cntk\cntk_py.py in get_next_minibatch(self, *args)
1914
1915 def get_next_minibatch(self, *args):
-> 1916 return _cntk_py.MinibatchSource_get_next_minibatch(self, *args)
1917 MinibatchSource_swigregister = _cntk_py.MinibatchSource_swigregister
1918 MinibatchSource_swigregister(MinibatchSource)
RuntimeError: Invalid chunk requested.
有时候它可能是很难搞清楚该文件在那里将是一个问题。是否有可能发出更具体的错误信息。输入文件中的行号会很有用。