通过 pip 安装 flask-bcrypt：无法找到 vcvarsall.bat

Question

我尝试通过 pip 安装 flask-bcrypt，但它引发了这个错误：

error: Microsoft Visual C++ 10.0 is required (Unable to find vcvarsall.bat)

我目前在Windows 10 上运行Visual Studio 2015 RC 和Python 3。

任何想法如何解决这个错误？

编辑： 我尝试遵循不同的解决方案并安装了 Visual Studio 2010 Express，但现在遇到以下错误（在 VS 2013 中通过 PIP 安装）：

Collecting py-bcrypt
Using cached py-bcrypt-0.4.tar.gz
Installing collected packages: py-bcrypt
Running setup.py install for py-bcrypt
Complete output from command "C:\Users\Niels\Documents\Visual Studio        2013\Projects\biospark\biospark\env_biospark\Scripts\python.exe" -c "import setuptools, tokenize;__file__='C:\\Users\\Niels\\AppData\\Local\\Temp\\pip-build-3pqnujd2\\py-bcrypt\\setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record C:\Users\Niels\AppData\Local\Temp\pip-syaty7au-record\install-record.txt --single-version-externally-managed --compile --install-headers "C:\Users\Niels\Documents\Visual Studio 2013\Projects\biospark\biospark\env_biospark\include\site\python3.4\py-bcrypt":
running install
running build
running build_py
creating build
creating build\lib.win-amd64-3.4
creating build\lib.win-amd64-3.4\bcrypt
copying bcrypt\__init__.py -> build\lib.win-amd64-3.4\bcrypt
running build_ext
building 'bcrypt._bcrypt' extension
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Users\Niels\AppData\Local\Temp\pip-build-3pqnujd2\py-bcrypt\setup.py", line 61, in <module>
    ext_modules = [bcrypt]
  File "C:\Users\Niels\Anaconda3\lib\distutils\core.py", line 148, in setup
    dist.run_commands()
  File "C:\Users\Niels\Anaconda3\lib\distutils\dist.py", line 955, in run_commands
    self.run_command(cmd)
  File "C:\Users\Niels\Anaconda3\lib\distutils\dist.py", line 974, in run_command
    cmd_obj.run()
  File "C:\Users\Niels\Documents\Visual Studio 2013\Projects\biospark\biospark\env_biospark\lib\site-packages\setuptools-15.1-py3.4.egg\setuptools\command\install.py", line 61, in run
  File "C:\Users\Niels\Anaconda3\lib\distutils\command\install.py", line 539, in run
    self.run_command('build')
  File "C:\Users\Niels\Anaconda3\lib\distutils\cmd.py", line 313, in run_command
    self.distribution.run_command(command)
  File "C:\Users\Niels\Anaconda3\lib\distutils\dist.py", line 974, in run_command
    cmd_obj.run()
  File "C:\Users\Niels\Anaconda3\lib\distutils\command\build.py", line 126, in run
    self.run_command(cmd_name)
  File "C:\Users\Niels\Anaconda3\lib\distutils\cmd.py", line 313, in run_command
    self.distribution.run_command(command)
  File "C:\Users\Niels\Anaconda3\lib\distutils\dist.py", line 974, in run_command
    cmd_obj.run()
  File "C:\Users\Niels\Documents\Visual Studio 2013\Projects\biospark\biospark\env_biospark\lib\site-packages\setuptools-15.1-py3.4.egg\setuptools\command\build_ext.py", line 50, in run
  File "C:\Users\Niels\Anaconda3\lib\distutils\command\build_ext.py", line 339, in run
    self.build_extensions()
  File "C:\Users\Niels\Anaconda3\lib\distutils\command\build_ext.py", line 448, in build_extensions
    self.build_extension(ext)
  File "C:\Users\Niels\Documents\Visual Studio 2013\Projects\biospark\biospark\env_biospark\lib\site-packages\setuptools-15.1-py3.4.egg\setuptools\command\build_ext.py", line 183, in build_extension
  File "C:\Users\Niels\Anaconda3\lib\distutils\command\build_ext.py", line 503, in build_extension
    depends=ext.depends)
  File "C:\Users\Niels\Anaconda3\lib\distutils\msvc9compiler.py", line 460, in compile
    self.initialize()
  File "C:\Users\Niels\Anaconda3\lib\distutils\msvc9compiler.py", line 371, in initialize
    vc_env = query_vcvarsall(VERSION, plat_spec)
  File "C:\Users\Niels\Documents\Visual Studio 2013\Projects\biospark\biospark\env_biospark\lib\site-packages\setuptools-15.1-py3.4.egg\setuptools\msvc9_support.py", line 52, in query_vcvarsall
  File "C:\Users\Niels\Anaconda3\lib\distutils\msvc9compiler.py", line 287, in query_vcvarsall
    raise ValueError(str(list(result.keys())))
ValueError: ['path']

----------------------------------------
Command ""C:\Users\Niels\Documents\Visual Studio 2013\Projects\biospark\biospark\env_biospark\Scripts\python.exe" -c "import setuptools, tokenize;__file__='C:\\Users\\Niels\\AppData\\Local\\Temp\\pip-build-3pqnujd2\\py-bcrypt\\setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record C:\Users\Niels\AppData\Local\Temp\pip-syaty7au-record\install-record.txt --single-version-externally-managed --compile --install-headers "C:\Users\Niels\Documents\Visual Studio 2013\Projects\biospark\biospark\env_biospark\include\site\python3.4\py-bcrypt"" failed with error code 1 in C:\Users\Niels\AppData\Local\Temp\pip-build-3pqnujd2\py-bcrypt


'py-bcrypt' failed to install. Exit code: 1

编辑 2： 我通过 thsi Windows Installer 安装了 pycrypto：https://github.com/axper/python3-pycrypto-windows-installer，它带有 bcrypt 并适合我的需要。但如果能解决原来的问题就好了。

Answer 1

显然这个问题可以通过先安装py-bcrypt来解决。此 reddit 帖子的第一条评论中提供了一个 win32 安装程序：

http://www.reddit.com/r/flask/comments/15q5xj/anyone_have_a_working_version_of_flaskbcrypt_for/

Answer 2

这里还有一个选项，你需要先设置 Wheel 包才能导入 bcrypt

pip install wheel

pip install bcrypt

 from flask_bcrypt import Bcrypt