Matplotlib 缺少 tkinter

Stankle of QuadnucYardOriginal...About 1 min

Matplotlib 缺少 tkinter

装了新版 Python 后使用 matplotlib 出现了这样的问题：

****.py: UserWarning: Matplotlib is currently using agg, which is a non-GUI backend, so cannot show the figure.
  plt.show()

根据报错信息，使用了无 GUI 的后端。

搜索相关问题，看到有人给出解决方案：

import matplotlib
matplotlib.use('TkAgg')

但是这样操作会导致新的运行时报错：

Traceback (most recent call last):
  File "****.py", line 40, in <module>
    plt.figure(figsize=(12, 4))
  File "D:\Program Files\Python\Python311\Lib\site-packages\matplotlib\_api\deprecation.py", line 454, in wrapper
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "D:\Program Files\Python\Python311\Lib\site-packages\matplotlib\pyplot.py", line 840, in figure
    manager = new_figure_manager(
              ^^^^^^^^^^^^^^^^^^^
  File "D:\Program Files\Python\Python311\Lib\site-packages\matplotlib\pyplot.py", line 383, in new_figure_manager
    _warn_if_gui_out_of_main_thread()
  File "D:\Program Files\Python\Python311\Lib\site-packages\matplotlib\pyplot.py", line 361, in _warn_if_gui_out_of_main_thread
    if _get_required_interactive_framework(_get_backend_mod()):
                                           ^^^^^^^^^^^^^^^^^^
  File "D:\Program Files\Python\Python311\Lib\site-packages\matplotlib\pyplot.py", line 208, in _get_backend_mod
    switch_backend(rcParams._get("backend"))
  File "D:\Program Files\Python\Python311\Lib\site-packages\matplotlib\pyplot.py", line 271, in switch_backend
    backend_mod = importlib.import_module(
                  ^^^^^^^^^^^^^^^^^^^^^^^^
  File "D:\Program Files\Python\Python311\Lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1206, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1178, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1149, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 940, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "D:\Program Files\Python\Python311\Lib\site-packages\matplotlib\backends\backend_tkagg.py", line 1, in <module>
    from . import _backend_tk
  File "D:\Program Files\Python\Python311\Lib\site-packages\matplotlib\backends\_backend_tk.py", line 8, in <module>
    import tkinter as tk
ModuleNotFoundError: No module named 'tkinter'