keras backend 报错OverflowError

File "mtrand.pyx", line 1289, in mtrand.RandomState.uniform (numpy/random/mtrand/mtrand.c:19267)
OverflowError: Range exceeds valid bounds

是的！之前我们在~/.keras/keras.json里改的theano它还是不长记性！
从异常跑出的栈里看是numpy的random函数有越界，
解决：
文件前面初始化设置：
from keras import backend
backend.set_image_dim_ordering('th')

if "image_dim_ordering": is "th" and "backend": "theano", your input_shape must be (channels, height, width)
if "image_dim_ordering": is "tf" and "backend": "tensorflow", your input_shape must be (height, width, channels)

用tensorflow+gpu的时候，在代码里添加这个，注意input此时变成了（samples,row,col,channels）的格式

from keras import backend
import tensorflow
sess=tensorflow.Session()
backend.set_session(sess)