問題描述：
Traceback (most recent call last):
File "/usr/lib/python3.5/tkinter/__init__.py", line 36, in <module>
import _tkinter
ImportError: No module named '_tkinter'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/PycharmProjects/TensorFlow-Learning/3.1非線性迴歸.py", line 5, in <module>
import matplotlib.pyplot as plt
File "/home/Envs/TF1.14-py2/lib/python3.5/site-packages/matplotlib/pyplot.py", line 2372, in <module>
switch_backend(rcParams["backend"])
File "/home/Envs/TF1.14-py2/lib/python3.5/site-packages/matplotlib/pyplot.py", line 207, in switch_backend
backend_mod = importlib.import_module(backend_name)
File "/home/Envs/TF1.14-py2/lib/python3.5/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "/home/Envs/TF1.14-py2/lib/python3.5/site-packages/matplotlib/backends/backend_tkagg.py", line 1, in <module>
from . import _backend_tk
File "/home/Envs/TF1.14-py2/lib/python3.5/site-packages/matplotlib/backends/_backend_tk.py", line 5, in <module>
import tkinter as Tk
File "/usr/lib/python3.5/tkinter/__init__.py", line 38, in <module>
raise ImportError(str(msg) + ', please install the python3-tk package')
ImportError: No module named '_tkinter', please install the python3-tk package
環境描述：
Ubuntu 16.04
Python 3.5.2
原因分析：
根本不是tkinter沒有安裝，或者被正確安裝完成，而是沒有被正確的配置好。
解決辦法1（懶人版）：
import matplotlib
matplotlib.use('agg')
import matplotlib.pyplot as plt
解決辦法2：
在終端執行一下命令
sudo apt-get update（如果不更新很有可能找不到tkinter）
sudo apt-get install python3-tk
注：也有說要卸載python後安裝相關依賴，再重新編譯python，以上發放不行的話百度新的方法重新試試。
引用：
https://blog.csdn.net/qq_33144323/article/details/80556954