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from collections import deque

import matplotlib as mpl

import matplotlib.pyplot as plt

import numpy as np

plt.ion()

# disable the built in key bindings

for k in ['keymap.all_axes',

'keymap.back',

'keymap.forward',

'keymap.fullscreen',

'keymap.grid',

'keymap.home',

'keymap.pan',

'keymap.save',

'keymap.xscale',

'keymap.yscale',

'keymap.zoom']:

mpl.rcParams[k] = []

fig, ax = plt.subplots()

th = np.linspace(0, 2*np.pi, 64)

ln, = ax.plot(th, np.sin(th), 'o-', picker=5)

class FormatterCollector:

def __init__(self, maxlen=15):

self.event_deque = deque([], maxlen=maxlen)

def __call__(self, event):

print(f'called {event.name} at ')

print(f' screen: ({event.x}, {event.y})')

if event.inaxes:

print(f' data: ({event.xdata:.3g}, {event.ydata:.3g})')

self.event_deque.append(event)

def collect_string(self):

return ''.join([ev.key for ev in self.event_deque

if ev.name == 'key_press_event'])

fc = FormatterCollector()

cids = {k: fig.canvas.mpl_connect(k, fc)

for k in ('key_press_event', 'button_press_event')}

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