arch linux python3.6.2 import matplotlib.pyplot as plt 报错

>>> import matplotlib.pyplot as plt

Traceback (most recent call last):

 File "", line 1, in
 File "/usr/lib/python3.6/site-packages/matplotlib/pyplot.py", line 115, in
   _backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_s
etup()
 File "/usr/lib/python3.6/site-packages/matplotlib/backends/__init__.py",line 32, in pylab_setup
   globals(),locals(),[backend_name],0)
 File "/usr/lib/python3.6/site-packages/matplotlib/backends/backend_tkagg.py", line 6, in
   from six.moves import tkinter as Tk
 File "/usr/lib/python3.6/site-packages/six.py", line 92, in __get__
   result = self._resolve()
 File "/usr/lib/python3.6/site-packages/six.py", line 115, in _resolve
   return _import_module(self.mod)
 File "/usr/lib/python3.6/site-packages/six.py", line 82, in _import_module
   __import__(name)
 File "/usr/lib/python3.6/tkinter/__init__.py", line 36, in
   import _tkinter # If this fails your Python may not be configured for Tk
ImportError: libtk8.6.so: cannot open shared object file: No such file or directory

原因：未安装tkinter模块

解决：pacman -S python-pmw 

安装tkinter模块