来自 guizero PushButton.py 的 guizero / tkinter PushButton NameError

Question

我是一个 Python 新手，正在尝试将我通过教程学到的一些东西结合起来；专门用 guizero 制作 GUI。

我创建了一个名为 player_name 的 TextBox 对象和一个名为 create_story 的 PushButton 对象。我的目标是在文本框为空时禁用该按钮，并在文本框中输入内容时启用该按钮。

guizero 文档将 "enable()" 和 "disable()" 列为附加到 PushButton 的方法，但没有详细说明：https://lawsie.github.io/guizero/pushbutton/#methods

到目前为止的完整代码：

import random
from guizero import App, Text, TextBox, PushButton, ButtonGroup, Combo, Box

def print_story():
    print("Button Pressed")

app = App(title="Visual Adventure", width=550, height=400,)

hello_message = Text(app, text="Hello, Traveler", size=20, color="red")
story_message = Text(app, text="Would you like to hear a tale?", size=14, color="black")

# organize into box with grid
selections = Box(app, layout="grid")

# text for questions
name_ques = Text(selections, text="What is your name?", size=10, color="black", grid=[0,0], align="left")
gender_ques = Text(selections, text="Boy or a girl?", size=10, color="black", grid=[0,2], align="left")
day_ques = Text(selections, text="What day is it?", size=10, color="black", grid=[0,4], align="left")

# text for grid padding
pad1 = Text(selections, text="        ", size=10, grid=[0,1], align="left")
pad2 = Text(selections, text="        ", size=10, grid=[0,3], align="left")

# interactive objects
player_name = TextBox(selections, width=15, grid=[1,0], align="top")
player_gender = ButtonGroup(selections, options=[ ["Boy", "He"], ["Girl", "She"] ], selected="He", horizontal=True, grid=[1,2], align="top")
day_set = Combo(selections, options=["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"], selected="Monday", grid=[1,4], align="top")

create_story = PushButton(app, command=print_story, text="Tell me!")

if not player_name.get():
    create_story.disable()
elif player_name.get():
    create_story.enable()

app.display()

错误：

Traceback (most recent call last):
  File "/home/pi/Desktop/python/VisualAdventure.py", line 32, in <module>
    create_story.disable()
  File "/usr/local/lib/python3.4/dist-packages/guizero/PushButton.py", line 59, in disable
    self.config(state=DISABLED)
NameError: name 'DISABLED' is not defined

Answer 1

恭喜，您发现了一个错误。如包裹所述：

This is a pre-release version, so there may be bugs and features may change.

由于 guizero 仍处于 alpha 版本，因此仍然存在错误。犯下这个错误的具体承诺是： https://github.com/lawsie/guizero/commit/236064b8781c298a87954775daed65cb384d04f4 (actually, there wasn't any mistakes made there, it's actually when lawsie merged the pull-request).As you can see here，那个人忘记导入 tkinter.DISABLE 和 tkinter.ENABLE。

您可以在此处报告此问题：https://github.com/lawsie/guizero/issues 希望他们能尽快更改它，因为这是一个非常容易解决的问题。

Answer 2

使用以下方法绕过它： create_story["state"] = "disabled" 等等

来自 guizero PushButton.py 的 guizero / tkinter PushButton NameError

guizero / tkinter PushButton NameError from guizero PushButton.py

python

user-interface

tkinter

zero

raspberry-pi3