1. 问题描述

>>>activate tensorflow
-----------------------------------------------------------------
conda.bat activate tensorflow
set "KERAS_BACKEND="
python D:\Anaconda3\envs\tensorflow\etc\keras\load_config.py  1>temp.txt
set /p KERAS_BACKEND= 0<temp.txt
del temp.txt
python -c "import keras"  1>nul 2>&1
if errorlevel 1 (
ver  1>nul
 set "KERAS_BACKEND=theano"
 python -c "import keras"  1>nul 2>&1
)

2. 解决方法

“在D:\Anaconda3\envs\tensorflow\etc\conda\”目录下找到“activate.d\keras_activate.bat”和 “deactivate.d\keras_deactivate.bat”文件，如下：

:: Figure out the default Keras backend by reading the config file.
python %CONDA_PREFIX%\etc\keras\load_config.py > temp.txt
set /p KERAS_BACKEND=<temp.txt
del temp.txt

:: Try to use the default Keras backend.
:: Fallback to Theano if it fails (Theano always works).
python -c "import keras" 1> nul 2>&1
if errorlevel 1 (
    ver > nul
    set "KERAS_BACKEND=theano"
    python -c "import keras" 1> nul 2>&1
)

set "KERAS_BACKEND="

把内容全部注释掉，搞定！

:: Figure out the default Keras backend by reading the config file.
::python %CONDA_PREFIX%\etc\keras\load_config.py > temp.txt
::set /p KERAS_BACKEND=<temp.txt
::del temp.txt

:: Try to use the default Keras backend.
:: Fallback to Theano if it fails (Theano always works).
::python -c "import keras" 1> nul 2>&1
::if errorlevel 1 (
    ::ver > nul
    ::set "KERAS_BACKEND=theano"
    ::python -c "import keras" 1> nul 2>&1
::)

::set "KERAS_BACKEND="