如何在Windows10的Python3.6中安装并正常使用lpsolve55与openturns？

Hey there, I’ve wrestled with getting these exact packages running on Python 3.6/Windows 10 before—older Python versions can be tricky since many official builds drop support over time. Let’s walk through solutions for each package one by one:

First, the standard pip install lpsolve55 often fails for Python 3.6 because there’s no official wheel maintained anymore. Here’s what worked for me:

• Uninstall any broken existing versions first:

  pip uninstall -y lpsolve55
  

• Grab a compatible third-party wheel: Look for a pre-compiled .whl file made specifically for Python 3.6 and your Windows architecture (64-bit is almost certainly what you’re using). Make sure the filename matches something like lpsolve55-<version>-cp36-cp36m-win_amd64.whl.
• Install the wheel directly: Navigate to the folder where you saved the file, then run:

  pip install lpsolve55-xxx-cp36-cp36m-win_amd64.whl
  

• Fix DLL missing errors (common issue): If you get a "lpsolve55.dll not found" error after installation, copy the lpsolve55.dll file (usually included in the wheel’s unpacked files) into your Python 3.6’s Lib\site-packages\lpsolve55 directory. Alternatively, add that directory to your system’s PATH environment variable. Also, make sure you have the Microsoft Visual C++ Redistributable for Visual Studio 2015 installed—Python 3.6 relies on this runtime.

openturns dropped official support for Python 3.6 a while back, so we need to use alternative installation methods:

• Conda is your best bet here: Conda-Forge maintains older package versions for legacy Python releases.
  1. If you don’t have a Python 3.6 conda environment yet, create one:

     conda create -n py36_openturns python=3.6
     conda activate py36_openturns
     

  2. Install openturns from conda-forge:

     conda install -c conda-forge openturns
     

• If conda isn’t an option, use a third-party wheel: Find a .whl file built for Python 3.6/Windows, then install it with pip just like we did for lpsolve55.
• Troubleshoot runtime errors: openturns often requires newer VC++ runtimes—install the Microsoft Visual C++ Redistributable for Visual Studio 2017 or later if you see missing DLL errors. Also, double-check that your Python 3.6 is a 64-bit build; 32-bit builds rarely work with modern scientific packages.

• Upgrade pip to the last version compatible with Python 3.6: Newer pip versions drop support for 3.6, so install version 21.0.1 (the final release that works with 3.6):

  pip install --upgrade pip==21.0.1
  

• Verify your Python environment: Run python --version and python -c "import platform; print(platform.architecture())" to confirm you’re on Python 3.6 64-bit—mismatched architectures are a common culprit for failed installs.

内容的提问来源于stack exchange，提问作者Elena Popa