Question

我正在尝试在Windows 10上安装Keras。我按照这个特定的顺序安装了Visual Studio 2015 Community Edition，CUDA 8.0，它的第二个补丁，cuDNN 6.0，PyCharm，Anaconda，Python 3.6.3。我安装了tensorflow-gpu。我将\path-to\Python\Python36\bin添加到PATH环境变量和NVIDIA文件夹中。 Tensorflow可以从shell运行，但不能从Anaconda提示符运行。当我尝试使用PowerShell中的pip install keras安装Keras时出现以下错误。

    PS C:\Users\myusr> pip install keras
    Collecting keras
      Downloading Keras-2.1.1-py2.py3-none-any.whl (302kB)
        100% |████████████████████████████████| 307kB 553kB/s
    Collecting pyyaml (from keras)
      Downloading PyYAML-3.12.tar.gz (253kB)
        100% |████████████████████████████████| 256kB 553kB/s
    Collecting scipy>=0.14 (from keras)
      Downloading scipy-1.0.0-cp36-none-win_amd64.whl (30.8MB)
        100% |████████████████████████████████| 30.8MB 41kB/s
    Requirement already satisfied: six>=1.9.0 in c:\users\myusr\appdata\local\programs\python\python36\lib\site-packages (from keras)
    Requirement already satisfied: numpy>=1.9.1 in c:\users\myusr\appdata\local\programs\python\python36\lib\site-packages (from keras)
    Building wheels for collected packages: pyyaml
      Running setup.py bdist_wheel for pyyaml ... error
      Failed building wheel for pyyaml
      Running setup.py clean for pyyaml
    Failed to build pyyaml
    Installing collected packages: pyyaml, scipy, keras
      Running setup.py install for pyyaml ... error
    Exception:
    Traceback (most recent call last):
      File "c:\users\myusr\appdata\local\programs\python\python36\lib\site-packages\pip\compat\__init__.py", line 73, in console_to_str
        return s.decode(sys.__stdout__.encoding)
            UnicodeDecodeError: 'utf-8' codec can't decode byte 0x8a in position 76: invalid start byte

            During handling of the above exception, another exception occurred:

    Traceback (most recent call last):
      File "c:\users\myusr\appdata\local\programs\python\python36\lib\site-packages\pip\basecommand.py", line 215, in main
        status = self.run(options, args)
      File "c:\users\myusr\appdata\local\programs\python\python36\lib\site-packages\pip\commands\install.py", line 342, in run
        prefix=options.prefix_path,
      File "c:\users\myusr\appdata\local\programs\python\python36\lib\site-packages\pip\req\req_set.py", line 784, in install
        **kwargs
      File "c:\users\myusr\appdata\local\programs\python\python36\lib\site-packages\pip\req\req_install.py", line 878, in install
        spinner=spinner,
      File "c:\users\myusr\appdata\local\programs\python\python36\lib\site-packages\pip\utils\__init__.py", line 676, in call_subprocess
        line = console_to_str(proc.stdout.readline())
      File "c:\users\myusr\appdata\local\programs\python\python36\lib\site-packages\pip\compat\__init__.py", line 75, in console_to_str
        return s.decode('utf_8')
    UnicodeDecodeError: 'utf-8' codec can't decode byte 0x8a in position 76: invalid start byte

我该怎么办？

Answer 1

这来自pyyaml模块。基于从版本3.6开始，Python for Windows使用UTF-8作为它的控制台IO会导致错误。在运行子进程的情况下，它认为子进程的输出也是UTF-8 ......实际情况并非如此。

有三种方法可以解决这个问题：

使用Python＆lt; 3.6（例如3.5.2）
使用locale.getpreferredencoding（False）进行编码
从cmd / powershell：chcp运行命令。它将显示系统默认代码，例如936.打开Lib / site-package / pip / compat / init .py 并且在第76行附近改变
```
return s.decode('utf_8')
```
到
```
return s.decode('cp936')
```

Answer 2

在我的Windows 10计算机上安装Keras时情况完全相同。

1）第一步是成功安装pyyaml ，与 easy_install 配合使用，并且没有显示UnicodeDecodeError

easy_install pyyaml

2）再次尝试安装 Keras

pip install keras

3）您可能会收到有关缓存的Keras安装文件的奇怪错误：

zipfile.BadZipFile: Bad CRC-32 for file 'tensorflow-1.8.0.data/purelib/tensorflow/python/_pywrap_tensorflow_internal.pyd'

只需添加no-cache指令

即可

pip install --no-cache-dir keras

在Windows 10上安装Keras时出现编码错误

2 个答案: