matplotlib.pyplot error when importing: ImportError: No module named '_tkinter', please install the python3-tk package

It looks like there is some package missing (python3-tk?), which prevents from normal usage of matplotlib.pyplot. Is there any workaround for this issue? Thanks!

Python 3.6.3 (default, Oct  6 2017, 08:44:35) 
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import matplotlib.pyplot
Traceback (most recent call last):
  File "/usr/lib/python3.6/tkinter/__init__.py", line 37, in <module>
    import _tkinter
ModuleNotFoundError: No module named '_tkinter'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.6/dist-packages/matplotlib/pyplot.py", line 116, in <module>
    _backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup()
  File "/usr/local/lib/python3.6/dist-packages/matplotlib/backends/__init__.py", line 60, in pylab_setup
    [backend_name], 0)
  File "/usr/local/lib/python3.6/dist-packages/matplotlib/backends/backend_tkagg.py", line 6, in <module>
    from six.moves import tkinter as Tk
  File "/usr/local/lib/python3.6/dist-packages/six.py", line 92, in __get__
    result = self._resolve()
  File "/usr/local/lib/python3.6/dist-packages/six.py", line 115, in _resolve
    return _import_module(self.mod)
  File "/usr/local/lib/python3.6/dist-packages/six.py", line 82, in _import_module
    __import__(name)
  File "/usr/lib/python3.6/tkinter/__init__.py", line 39, in <module>
    raise ImportError(str(msg) + ', please install the python3-tk package')
ImportError: No module named '_tkinter', please install the python3-tk package

[ufoym]

When you want to use matplotlib in deepo, we suggest using a non-interactive backend such as agg. In your figure-generating script, just call the matplotlib.use() directive before importing pylab or pyplot:

import matplotlib
matplotlib.use('agg')
import matplotlib.pyplot as plt
plt.plot([1,2,3])
plt.savefig('myfig')

[ksajjan]

Hi, In the below case

This call to matplotlib.use() has no effect because the backend has already

Just restart the terminal.