title: How to install tkinter on windows 10, python 3.6.1
body: <p>I've encountered similar errors while using several different packages like matplotlib and pymc3, error message said:</p>
  
  <pre><code>    Traceback (most recent call last):
    File "&lt;stdin&gt;", line 1, in &lt;module&gt;
    File "C:\Python36\lib\site-packages\matplotlib\pyplot.py", line 115, in &lt;module&gt;
      _backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup()
    File "C:\Python36\lib\site-packages\matplotlib\backends\__init__.py", line 32, in pylab_setup
      globals(),locals(),[backend_name],0)
    File "C:\Python36\lib\site-packages\matplotlib\backends\backend_tkagg.py", line 6, in &lt;module&gt;
      from six.moves import tkinter as Tk
    File "C:\Python36\lib\site-packages\six.py", line 92, in __get__
      result = self._resolve()
    File "C:\Python36\lib\site-packages\six.py", line 115, in _resolve
      return _import_module(self.mod)
    File "C:\Python36\lib\site-packages\six.py", line 82, in _import_module
      __import__(name)
  ModuleNotFoundError: No module named 'tkinter'
  </code></pre>
  
  <p>I'm totally new to python, have no idea what tkinter is. After some googles, I tried to install ActiveTcl 8.6.4 into default path, but it doesn't work.</p>
  
  <p>What should I do?</p>