from __future__ import print_function
"""
Demonstrate/test the idle and timeout API

WARNING: idle_event is deprecated. Use the animations module instead.

This is only tested on gtk so far and is a prototype implementation
"""
import numpy as np
import matplotlib.pyplot as plt

fig, ax = plt.subplots()

t = np.arange(0.0, 2.0, 0.01)
y1 = np.sin(2*np.pi*t)
y2 = np.cos(2*np.pi*t)
line1, = ax.plot(y1)
line2, = ax.plot(y2)

N = 100


def on_idle(event):
    on_idle.count += 1
    print('idle', on_idle.count)
    line1.set_ydata(np.sin(2*np.pi*t*(N - on_idle.count)/float(N)))
    event.canvas.draw()
    # test boolean return removal
    if on_idle.count == N:
        return False
    return True
on_idle.cid = None
on_idle.count = 0

fig.canvas.mpl_connect('idle_event', on_idle)

plt.show() 

　

Traceback (most recent call last):
  File "M:\______\idle_and_timeout.py", line 35, in 
    fig.canvas.mpl_connect('idle_event', on_idle)
  File "C:\Users\____\AppData\Local\Programs\Python
    \Python311\Lib\site-packages\matplotlib\backend_bases.py", line 2476, in mpl_connect
    return self.callbacks.connect(s, func)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\______\AppData\Local\Programs\Python
    \Python311\Lib\site-packages\matplotlib\cbook\__init__.py", line 224, in connect
    _api.check_in_list(self._signals, signal=signal)
  File "C:\Users\______\AppData\Local\Programs\Python
    \Python311\Lib\site-packages\matplotlib\_api\__init__.py", line 131, in check_in_list
    raise ValueError(msg)
ValueError: 'idle_event' is not a valid value for signal; supported values are 
    'resize_event', 'draw_event', 'key_press_event', 'key_release_event', 
    'button_press_event', 'button_release_event', 'scroll_event', 'motion_notify_event', 
    'pick_event', 'figure_enter_event', 'figure_leave_event', 'axes_enter_event', 
    'axes_leave_event', 'close_event' 

Traceback (most recent call last):
  File "E:\______\idle_and_timeout.py", line 35, in 
    fig.canvas.mpl_connect('idle_event', on_idle)
  File "C:\Program Files\Python312\Lib\site-packages\matplotlib\backend_bases.py", 
    line 2304, in mpl_connect
    return self.callbacks.connect(s, func)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Program Files\Python312\Lib\site-packages\matplotlib\cbook.py", 
    line 218, in connect
    _api.check_in_list(self._signals, signal=signal)
  File "C:\Program Files\Python312\Lib\site-packages\matplotlib\_api\__init__.py", 
    line 129, in check_in_list
    raise ValueError(msg)
ValueError: 'idle_event' is not a valid value for signal; supported values are 
    'resize_event', 'draw_event', 'key_press_event', 'key_release_event', 
    'button_press_event', 'button_release_event', 'scroll_event', 
    'motion_notify_event', 'pick_event', 'figure_enter_event', 'figure_leave_event', 
    'axes_enter_event', 'axes_leave_event', 'close_event' 

• 2023/11/13 Ver=1.04 Python 3.12.0 (matplotlib 3.8.1)で確認
• 2023/11/13 Ver=1.04 Python 3.11.6 (matplotlib 3.7.1)で確認
• 2023/03/29 Ver=1.03 Python 3.11.2 で確認
• 2020/10/30 Ver=1.01 Python 3.7.8 で確認
• 2018/11/25 Ver=1.01 初版リリース

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