为像我这样的穷人使用python 3.7。您需要python3.7-tk包。

安装python3.7-tk

$ python
Python 3.7.4 (default, Sep  2 2019, 20:44:09)
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import tkinter
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'tkinter'
>>> exit()

请注意。安装Python3-tk。但不是python3.7-tk。

$ sudo apt install python3.7-tk
Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
  tix python3.7-tk-dbg
The following NEW packages will be installed:
  python3.7-tk
0 upgraded, 1 newly installed, 0 to remove and 34 not upgraded.
Need to get 143 kB of archives.
After this operation, 534 kB of additional disk space will be used.
Get:1 http://ppa.launchpad.net/deadsnakes/ppa/ubuntu xenial/main amd64 python3.7-tk amd64 3.7.4-1+xenial2 [143
kB]
Fetched 143 kB in 0s (364 kB/s)
Selecting previously unselected package python3.7-tk:amd64.
(Reading database ... 256375 files and directories currently installed.)
Preparing to unpack .../python3.7-tk_3.7.4-1+xenial2_amd64.deb ...
Unpacking python3.7-tk:amd64 (3.7.4-1+xenial2) ...
Setting up python3.7-tk:amd64 (3.7.4-1+xenial2) ...

安装之后，一切都好了。

$ python3
Python 3.7.4 (default, Sep  2 2019, 20:44:09)
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import tkinter
>>> exit()

在CentOS 6.5和python 2.7上，我需要做:yum安装python27-tkinter

Almost all answers I searched for this issue say that Python on Windows comes with tkinter and tcl already installed, and I had no luck trying to download or install them using pip, or actviestate.com site. I eventually found that when I was installing python using the binary installer, I had unchecked the module related to TCL and tkinter. So, I ran the binary installer again and chose to modify my python version by this time selecting this option. No need to do anything manually then. If you go to your python terminal, then the following commands should show you version of tkinter installed with your Python:

import tkinter
import _tkinter
tkinter._test()

也许你从源代码安装了python。在这种情况下，您可以重新编译支持tcl/tk的python。

从http://www.tcl.tk/software/tcltk/download.html编译并安装tcl/tk，我假设你在/home/xxx/local/tcl-tk/安装python。

# install tcl
wget -c https://prdownloads.sourceforge.net/tcl/tcl8.6.9-src.tar.gz
tar -xvzf tcl8.6.9-src.tar.gz
cd tcl8.6.9
./configure --prefix=/home/xxx/local/tcl-tk/
make
make install

# install tk
wget -c https://prdownloads.sourceforge.net/tcl/tk8.6.9.1-src.tar.gz
tar -xvzf tk8.6.9.1-src.tar.gz
cd tk8.6.9.1
./configure --prefix=/home/xxx/local/tcl-tk/
make
make install

使用tcl/tk重新编译python，例如:

# download the source code of python and decompress it first.

cd <your-python-src-dir>
./configure --prefix=/home/xxx/local/python \
 --with-tcltk-includes=/home/xxx/local/tcl-tk/include \
 --with-tcltk-libs=/home/xxx/local/tcl-tk/lib
make 
make install

如果你有pip(你可能有)，在Windows上打开cmd或powershell，或者在OS X或Linux上打开终端窗口，然后尝试这样做(如果你在Windows上，请确保python在系统路径中):

pip install tkinter

安装tkinter需要一段时间，然后尝试执行以下代码块:

from tkinter import *
root = Tk()
# Your code goes here 
root.mainloop()

希望这能有所帮助!谢谢你！

对于Windows用户，无需再次下载安装程序。只需要做以下几点:

进入开始菜单，输入应用程序和功能， 在搜索框中搜索“python”， 选择Python版本(例如Python 3.8.3rc1(32位))并单击修改， 在“修改设置”页面单击“修改”， 勾选td/tk和IDLE复选框(这会安装tkinter)，然后单击下一步。

等待安装，您就完成了。