Python错误: ModuleNotFoundError:没有名为'cryptography.hazmat.bindings._constant_time‘的模块

Question

我正在尝试运行一个我过去已经能够运行的脚本。它停止并返回错误：

ModuleNotFoundError: No module named 'cryptography.hazmat.bindings._constant_time'

我最近删除了Python3.6并安装了python ActiveState：

ActivePython 3.6.0.3600 (ActiveState Software Inc.) based on
Python 3.6.0 (default, Jan 23 2017, 20:01:14) [MSC v.1900 64 bit (AMD64)] on win32

到目前为止我已经尝试过的东西：

重新安装加密技术

正在重新安装加密系统，但出现错误：

Program Files (x86)\Windows Kits\10\include\10.0.17763.0\shared" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\um" "-IC:\Program Files (x86)\Windows Kits\10\includ
e\10.0.17763.0\winrt" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.17763.0\ucrt" "-IC:\Program Files (x86)\Windows Kits\NETFXSDK\4.6.1\include\um" /Tcbuild\temp.win-amd64
-3.6\Release\_openssl.c /Fobuild\temp.win-amd64-3.6\Release\build\temp.win-amd64-3.6\Release\_openssl.obj
  error: command 'cl.exe' failed: No such file or directory

  ----------------------------------------
  Failed building wheel for cryptography
  Running setup.py clean for cryptography
Failed to build cryptography
Could not build wheels for cryptography which use PEP 517 and cannot be installed directly

任何帮助都将不胜感激。我对python是个新手，但我感到困惑。

Answer 1

看起来今天发布的版本实际上破坏了一些东西；使用cryptography==2.5可能会让你克服这个错误，直到他们修复了2.6。