g++不可用，如果使用conda:`conda install m2w64 toolchain`

Question

在学习这些教程Neural net的过程中，在运行test.py文件时，我收到了这些异常和警告。我已经尝试过以前的建议，但没有任何效果。

WARNING (theano.configdefaults): g++ not available, if using conda: `conda install m2w64-toolchain`
C:\ProgramData\Anaconda3\lib\site-packages\theano\configdefaults.py:560: UserWarning: DeprecationWarning: there is no c++ compiler.This is deprecated and with Theano 0.11 a c++ compiler will be mandatory
  warnings.warn("DeprecationWarning: there is no c++ compiler."
WARNING (theano.configdefaults): g++ not detected ! Theano will be unable to execute optimized C-implementations (for both CPU and GPU) and will default to Python implementations. Performance will be severely degraded. To remove this warning, set Theano flags cxx to an empty string.
WARNING (theano.tensor.blas): Using NumPy C-API based implementation for BLAS functions.

任何适当的修理将不胜感激。

在尝试使用conda install m2w64-toolchain之后。另一个错误是

*You can find the C code in this temporary file: C:\Users\CERTAI~1\AppData\Local\Temp\theano_compilation_error_7bgw9_s9
Traceback (most recent call last):
  File "C:\ProgramData\Anaconda3\lib\site-packages\theano\gof\lazylinker_c.py", line 75, in <module>
    raise ImportError()
ImportError

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\ProgramData\Anaconda3\lib\site-packages\theano\gof\lazylinker_c.py", line 92, in <module>
    raise ImportError()
ImportError

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\shubhamprojectwork\all Work 2018\kaggle\DeepLearningPython35-master\DeepLearningPython35-master\test.py", line 156, in <module>
    import network3
  File "C:\shubhamprojectwork\all Work 2018\kaggle\DeepLearningPython35-master\DeepLearningPython35-master\network3.py", line 37, in <module>
    import theano
  File "C:\ProgramData\Anaconda3\lib\site-packages\theano\__init__.py", line 110, in <module>
    from theano.compile import (
  File "C:\ProgramData\Anaconda3\lib\site-packages\theano\compile\__init__.py", line 12, in <module>
    from theano.compile.mode import *
  File "C:\ProgramData\Anaconda3\lib\site-packages\theano\compile\mode.py", line 11, in <module>
    import theano.gof.vm
  File "C:\ProgramData\Anaconda3\lib\site-packages\theano\gof\vm.py", line 673, in <module>
    from . import lazylinker_c
  File "C:\ProgramData\Anaconda3\lib\site-packages\theano\gof\lazylinker_c.py", line 127, in <module>
    preargs=args)
  File "C:\ProgramData\Anaconda3\lib\site-packages\theano\gof\cmodule.py", line 2359, in compile_str
    (status, compile_stderr.replace('\n', '. ')))
Exception: Compilation failed (return status=1): C:\Users\CERTAI~1\AppData\Local\Temp\ccFdFXU1.o: In function `_import_array':
. C:/ProgramData/Anaconda3/lib/site-packages/numpy/core/include/numpy/__multiarray_api.h:1470: undefined reference to `__imp_PyExc_ImportError'
. C:/ProgramData/Anaconda3/lib/site-packages/numpy/core/include/numpy/__multiarray_api.h:1476: undefined reference to `__imp_PyExc_AttributeError'
. C:/ProgramData/Anaconda3/lib/site-packages/numpy/core/include/numpy/__multiarray_api.h:1481: undefined reference to `__imp_PyCapsule_Type'
. C:/ProgramData/Anaconda3/lib/site-packages/numpy/core/include/numpy/__multiarray_api.h:1482: undefined reference to `__imp_PyExc_RuntimeError'
. C:/ProgramData/Anaconda3/lib/site-packages/numpy/core/include/numpy/__multiarray_api.h:1497: undefined reference to `__imp_PyExc_RuntimeError'
. C:/ProgramData/Anaconda3/lib/site-packages/numpy/core/include/numpy/__multiarray_api.h:1505: undefined reference to `__imp_PyExc_RuntimeError'
. C:/ProgramData/Anaconda3/lib/site-packages/numpy/core/include/numpy/__multiarray_api.h:1511: undefined reference to `__imp_PyExc_RuntimeError'
. C:/ProgramData/Anaconda3/lib/site-packages/numpy/core/include/numpy/__multiarray_api.h:1521: undefined reference to `__imp_PyExc_RuntimeError'
. C:\Users\CERTAI~1\AppData\Local\Temp\ccFdFXU1.o:C:/ProgramData/Anaconda3/lib/site-packages/numpy/core/include/numpy/__multiarray_api.h:1533: more undefined references to `__imp_PyExc_RuntimeError' follow
. C:\Users\CERTAI~1\AppData\Local\Temp\ccFdFXU1.o: In function `NpyCapsule_Check':
. C:/ProgramData/Anaconda3/lib/site-packages/numpy/core/include/numpy/npy_3kcompat.h:456: undefined reference to `__imp_PyCapsule_Type'
. C:\Users\CERTAI~1\AppData\Local\Temp\ccFdFXU1.o: In function `unpack_list_of_ssize_t':
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:48: undefined reference to `__imp_PyExc_TypeError'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:58: undefined reference to `__imp_PyExc_IndexError'
. C:\Users\CERTAI~1\AppData\Local\Temp\ccFdFXU1.o: In function `CLazyLinker_init':
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:352: undefined reference to `__imp_PyExc_IndexError'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:370: undefined reference to `__imp_PyExc_IndexError'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:385: undefined reference to `__imp_PyExc_IndexError'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:389: undefined reference to `__imp_PyExc_IndexError'
. C:\Users\CERTAI~1\AppData\Local\Temp\ccFdFXU1.o:C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:393: more undefined references to `__imp_PyExc_IndexError' follow
. C:\Users\CERTAI~1\AppData\Local\Temp\ccFdFXU1.o: In function `CLazyLinker_init':
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:405: undefined reference to `__imp_PyExc_TypeError'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:420: undefined reference to `__imp__Py_NoneStruct'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:426: undefined reference to `__imp_PyExc_IndexError'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:440: undefined reference to `__imp_PyExc_TypeError'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:444: undefined reference to `__imp__Py_NoneStruct'
. C:\Users\CERTAI~1\AppData\Local\Temp\ccFdFXU1.o: In function `c_call':
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:545: undefined reference to `__imp__Py_NoneStruct'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:545: undefined reference to `__imp__Py_NoneStruct'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:545: undefined reference to `__imp__Py_NoneStruct'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:546: undefined reference to `__imp__Py_NoneStruct'
. C:\Users\CERTAI~1\AppData\Local\Temp\ccFdFXU1.o:C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:546: more undefined references to `__imp__Py_NoneStruct' follow
. C:\Users\CERTAI~1\AppData\Local\Temp\ccFdFXU1.o: In function `lazy_rec_eval':
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:618: undefined reference to `__imp_PyExc_IndexError'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:641: undefined reference to `__imp_PyExc_TypeError'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:649: undefined reference to `__imp_PyExc_ValueError'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:657: undefined reference to `__imp_PyExc_IndexError'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:708: undefined reference to `__imp__Py_NoneStruct'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:715: undefined reference to `__imp_PyExc_TypeError'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:721: undefined reference to `__imp_PyExc_TypeError'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:771: undefined reference to `__imp__Py_NoneStruct'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:771: undefined reference to `__imp__Py_NoneStruct'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:772: undefined reference to `__imp__Py_NoneStruct'
. C:\Users\CERTAI~1\AppData\Local\Temp\ccFdFXU1.o: In function `CLazyLinker_call':
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:814: undefined reference to `__imp_PyExc_RuntimeError'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:826: undefined reference to `__imp_PyExc_RuntimeError'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:839: undefined reference to `__imp__Py_NoneStruct'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:839: undefined reference to `__imp__Py_NoneStruct'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:840: undefined reference to `__imp__Py_NoneStruct'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:849: undefined reference to `__imp__Py_NoneStruct'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:849: undefined reference to `__imp__Py_NoneStruct'
. C:\Users\CERTAI~1\AppData\Local\Temp\ccFdFXU1.o:C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:850: more undefined references to `__imp__Py_NoneStruct' follow
. C:\Users\CERTAI~1\AppData\Local\Temp\ccFdFXU1.o: In function `CLazyLinker_call':
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:894: undefined reference to `__imp_PyExc_AssertionError'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:937: undefined reference to `__imp__Py_NoneStruct'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:937: undefined reference to `__imp__Py_NoneStruct'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:938: undefined reference to `__imp__Py_NoneStruct'
. C:\Users\CERTAI~1\AppData\Local\Temp\ccFdFXU1.o: In function `CLazyLinker_set_allow_gc':
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:973: undefined reference to `__imp_PyBool_Type'
. C:/Users/Certainty1/AppData/Local/Theano/compiledir_Windows-10-10.0.16299-SP0-Intel64_Family_6_Model_142_Stepping_9_GenuineIntel-3.6.1-64/lazylinker_ext/mod.cpp:976: undefined reference to `__imp__Py_TrueStruct'
. collect2.exe: error: ld returned 1 exit status
.* 

Answer 1

根据我个人的经验，这个连续的错误是由python*.dll for windows不存在（或者根本找不到）引起的。您可以通过'conda install libpython'来解决这个问题