title: can't install local wheels with python3/pip (not a supported wheel on this platform)
body: <p>I want to install lxml with python3 on my windows machine, but it complains there is lack of <code>libxml2</code> so that I can't compile it with Visual Studio, I think.</p>
  <p>I googled and found that I maybe have to download &quot;un-official&quot; wheel myself from <a href="https://www.lfd.uci.edu/%7Egohlke/pythonlibs/#libxml-python" rel="nofollow noreferrer">here</a> and install that with pip, but I can't do that since it seems all the wheels are not supported, by the way, I am using Pycharms' <em>venv</em></p>
  <pre><code>(venv) D:\work\bigquery - Copy&gt;python
  Python 3.8.2 (tags/v3.8.2:7b3ab59, Feb 25 2020, 23:03:10) [MSC v.1916 64 bit (AMD64)] on win32
  Type &quot;help&quot;, &quot;copyright&quot;, &quot;credits&quot; or &quot;license&quot; for more information.
  &gt;&gt;&gt; exit()
  
  (venv) D:\work\bigquery - Copy&gt;pip --version
  pip 19.0.3 from d:\work\bigquery - copy\venv\lib\site-packages\pip-19.0.3-py3.8.egg\pip (python 3.8)
  
  (venv) D:\work\bigquery - Copy&gt;pip install lxml-4.5.2-cp38-cp38-win_amd64.whl
  lxml-4.5.2-cp38-cp38-win_amd64.whl is not a supported wheel on this platform.
  
  (venv) D:\work\bigquery - Copy&gt;pip install lxml-4.5.2-cp39-cp39-win32.whl
  lxml-4.5.2-cp39-cp39-win32.whl is not a supported wheel on this platform.
  
  (venv) D:\work\bigquery - Copy&gt;pip install lxml-4.5.2-cp38-cp38-win32.whl
  lxml-4.5.2-cp38-cp38-win32.whl is not a supported wheel on this platform.
  </code></pre>
  <p>I have tried numbers of wheels of that package, but all seems not to work, What could be wrong?</p>