python - CNTK(微软认知工具包)导入错误

Question

代码:

import cntk
n = cntk.minus([1, 2, 3], [4, 5, 6]).eval()
print(n)

问题:

If run the code line by line in python command line, it's ok.

If run "Python main.py", it's also ok.

But if run the code in PyCharm or Visual Studio Code, error occurs, PyCharm error dump:

Traceback (most recent call last):
File "D:\Apps\Anaconda3\envs\Python3.53\lib\site-packages\cntk\cntk_py.py", line 18, in swig_import_helper
  return importlib.import_module(mname)
File "D:\Apps\Anaconda3\envs\Python3.53\lib\importlib\__init__.py", line 126, in import_module
  return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 986, in _gcd_import
File "<frozen importlib._bootstrap>", line 969, in _find_and_load
File "<frozen importlib._bootstrap>", line 956, in _find_and_load_unlocked
ImportError: No module named 'cntk._cntk_py'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "D:/Dev/machine_learning/Test_CNTK/main.py", line 1, in <module>
    import cntk
  File "D:\Apps\Anaconda3\envs\Python3.53\lib\site-packages\cntk\__init__.py", line 11, in <module>
    from .core import *
  File "D:\Apps\Anaconda3\envs\Python3.53\lib\site-packages\cntk\core.py", line 10, in <module>
    from . import cntk_py
  File "D:\Apps\Anaconda3\envs\Python3.53\lib\site-packages\cntk\cntk_py.py", line 21, in <module>
    _cntk_py = swig_import_helper()
  File "D:\Apps\Anaconda3\envs\Python3.53\lib\site-packages\cntk\cntk_py.py", line 20, in swig_import_helper
    return importlib.import_module('_cntk_py')
  File "D:\Apps\Anaconda3\envs\Python3.53\lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
ImportError: DLL load failed: The specified module could not be found.

环境:

• python :4.3.1
• Python:3.5.3(anaconda 中的虚拟环境)
• CNTK:适用于 windows amd64 GPU 的 2.0beta12
• PyCharm:2016.3.2
• Visual Studio 代码:1.10.2

Answer 1

已解决

由于找不到带有CNTK的DLL文件(如CNTKLibrary-2.0.dll、EvalDll.dll)，安装CNTK后这些DLL都在“python.exe”的同一目录下。

有两种解决方法:

(假设PYTHONDIR是python.exe所在的目录)

1. 更改系统环境 PATH 以包含 PYTHONDIR

2. 在“import cntk”之前添加如下代码:

   导入操作系统； os.environ['PATH'] = PYTHONDIR + ';' + os.environ['PATH']