我有以下课程，我有 4 个按钮可以去：
使用 jupyter notebook，我想点击所需的按钮，它会转到相关的图像。但是按钮只工作一次（同一个或另一个按钮），我无法浏览所有图像。
如何在这个类中多次使用按钮？
class DisplayButtons:
def __init__(self, low_path, restored_path):
self.left = None
self.right = None
self.top_right = None
self.top_left = None
self.index = None
self.box = None
self.low_path = low_path
self.restored_path = restored_path
def plot_restoration(self):
clear_output()
display(self.box)
img = imread(self.low_path[self.index])
if img.ndim == 3: img = img[0]
height, width = img.shape
if height < 450: height, width = height * 2, width * 2
img_restored = imread(self.restored_path[self.index])
plt.figure(figsize = (height/50, width/50))
plt.subplot(1, 2, 1)
plt.imshow(img)
plt.subplot(1, 2, 2)
plt.imshow(img_restored)
plt.show()
def is_end(self):
return self.index == len(self.low_path) - 1
def is_start(self):
return self.index == 0
def is_displayed(self):
return self.index is not None
def go_top_left(self):
if not self.is_start():
self.initialize()
def initialize(self):
self.index=0
self.plot_restoration()
def go_left(self):
if not self.is_displayed or self.is_start():
self.initialize()
else:
self.index -= 1
self.plot_restoration()
def go_right(self):
if not self.is_end():
self.index += 1
self.plot_restoration()
def go_top_right(self):
if not self.is_end():
self.index = len(self.low_path) - 1
self.plot_restoration()
def set_buttons(self):
# Define buttons
scroll = ['⇤', '←', '→', '⇥']
layout = widgets.Layout(width='auto', height='auto')
buttons = [Button(description=s, layout = layout) for s in scroll]
button_1, button_2, button_3, button_4 = buttons
box_1 = VBox([buttons[0]])
box_2 = VBox([buttons[1]])
box_3 = VBox([buttons[2]])
box_4 = VBox([buttons[3]])
self.box = HBox([box_1, box_2, box_3, box_4])
# Launch of function when click
button_1.on_click(self.go_top_left())
button_2.on_click(self.go_left())
button_3.on_click(self.go_right())
button_4.on_click(self.go_top_right())
display(self.box)
感谢您的帮助
传递方法引用而不是调用方法
向按钮的事件处理程序添加第二个参数，代表单击的按钮小部件实例。
你将需要一些其他的逻辑更新，但前两点应该足以涵盖如何多次使用按钮
from ipywidgets import Button, HBox, Layout, VBox
class DisplayButtons:
def __init__(self, low_path, restored_path):
self.left = None
self.right = None
self.top_right = None
self.top_left = None
self.index = None
self.box = None
self.low_path = low_path
self.restored_path = restored_path
def plot_restoration(self):
clear_output()
display(self.box)
img = imread(self.low_path[self.index])
if img.ndim == 3: img = img[0]
height, width = img.shape
if height < 450: height, width = height * 2, width * 2
img_restored = imread(self.restored_path[self.index])
plt.figure(figsize = (height/50, width/50))
plt.subplot(1, 2, 1)
plt.imshow(img)
plt.subplot(1, 2, 2)
plt.imshow(img_restored)
plt.show()
def is_end(self):
return self.index == len(self.low_path) - 1
def is_start(self):
return self.index == 0
def is_displayed(self):
return self.index is not None
def go_top_left(self, b): # <- 2. button argument
if not self.is_start():
self.initialize()
def initialize(self):
self.index=0
self.plot_restoration()
def go_left(self, b): # <- 2. button argument
if not self.is_displayed or self.is_start():
self.initialize()
else:
self.index -= 1
self.plot_restoration()
def go_right(self, b): # <- 2. button argument
if not self.is_end():
self.index += 1
self.plot_restoration()
def go_top_right(self, b): # <- 2. button argument
if not self.is_end():
self.index = len(self.low_path) - 1
self.plot_restoration()
def set_buttons(self):
# Define buttons
scroll = ['⇤', '←', '→', '⇥']
layout = widgets.Layout(width='auto', height='auto')
buttons = [Button(description=s, layout = layout) for s in scroll]
button_1, button_2, button_3, button_4 = buttons
box_1 = VBox([buttons[0]])
box_2 = VBox([buttons[1]])
box_3 = VBox([buttons[2]])
box_4 = VBox([buttons[3]])
self.box = HBox([box_1, box_2, box_3, box_4])
# Launch of function when click
button_1.on_click(self.go_top_left) # <- 1. method reference
button_2.on_click(self.go_left) # <- 1. method reference
button_3.on_click(self.go_right) # <- 1. method reference
button_4.on_click(self.go_top_right) # <- 1. method reference
display(self.box)