fix: app in ipython, Visplter figure not shown at all.
fix: app in ipython, Visplter figure not shown at all.

Error info:

```
%matplotlib
-------------------------------------------------------------------
ModuleNotFoundError               Traceback (most recent call last)
<ipython-input-5-a49a4afc47c5> in <module>
----> 1 get_ipython().run_line_magic('matplotlib', '')
.......................
IPython/terminal/pt_inputhooks/__init__.pyc in get_inputhook_name_and_func(gui)
importlib/__init__.pyc in import_module(name, package)
.......................
ModuleNotFoundError: No module named 'IPython.terminal.pt_inputhooks.tk'
```

shmilee/gdpy3,shmilee/gdpy3,shmilee/gdpy3,shmilee/gdpy3