python - 导入 shared_randomstreams.RandomStreams 时无法从 Google colab 上的 Theano 导入 local_bitwidth

Question

我在从 'theano.configdefaults' 导入 'local_bitwidth' 时遇到问题。并显示以下消息:

ImportError                               Traceback (most recent call last)
<ipython-input-80-1e0aa55408e4> in <module>()
     39 from theano.tensor.nnet import conv
     40 from theano.tensor.nnet import softmax
---> 41 from theano.tensor import shared_randomstreams
     42 from theano.tensor.signal.pool import pool_2d
     43 

7 frames
/usr/local/lib/python3.7/dist-packages/theano/gof/cmodule.py in <module>()
     35 # we will abuse the lockfile mechanism when reading and writing the registry
     36 from theano.gof import compilelock
---> 37 from theano.configdefaults import gcc_version_str, local_bitwidth
     38 
     39 importlib = None

ImportError: cannot import name 'local_bitwidth' from 'theano.configdefaults' (/usr/local/lib/python3.7/dist-packages/theano/configdefaults.py)

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我在尝试首先运行此代码时收到此错误:

from theano import function
srng = RandomStreams(seed=234)
rv_u = srng.uniform((2,2))
rv_n = srng.normal((2,2))
f = function([], rv_u)
g = function([], rv_n, no_default_updates=True)    #Not updating rv_n.rng
nearly_zeros = function([], rv_u + rv_u - 2 * rv_u)

然后当我运行 Michael Nielsen 书中的卷积神经网络示例时，其中有一行调用 RandomStreams 方法。它们都是我在 google collab 上跑的，有没有办法在 colab 上处理它？<​​/p>

Answer 1

我昨天遇到了同样的问题，你需要安装 Theano 的 1.0.5 版本，也许你使用的版本与这个版本不同。

在 Google Colab 中:!pip3 卸载theano

并且:!pip3 install theano==1.0.5