我的一门课程对tkinter进行了传递，并且它超出了入门课程的范围。它激起了我的好奇心，我想深入挖掘它。
我有基础知识 - 我可以让复选框显示在我想要的位置，但我想让它更具动态性/ pythonic。
第1列 - 应始终显示所有复选框。这按预期工作。 第2列 - 仅显示第一个复选框，如果单击该复选框，则应显示其他4个复选框。单击这4个复选框中的任何一个时，它应该在UI底部的文本框中显示一条消息。
当我单击第二列中焦点课程的复选框时，它们什么都不做。此外，当选择核心课程的复选框时，通常隐藏的ABC 702复选框似乎随机出现。我无法弄清楚原因。
from tkinter import *
class Application(Frame):
def __init__(self, master):
Frame.__init__(self, master)
self.grid()
self.create_widgets()
# self.grid()
# self.create_widgets()
def create_widgets(self):
Label(self, text="How many of the core courses have you completed so far?"
).grid(row=1, column=0, sticky=W)
self.checkBoxA = BooleanVar()
Checkbutton(self,
text="ABC 501",
variable=self.checkBoxA,
command=self.update_text
).grid(row=2, column=0, sticky=W)
self.checkBoxB = BooleanVar()
Checkbutton(self,
text="ABC 502",
variable=self.checkBoxB,
command=self.update_text
).grid(row=3, column=0, sticky=W)
self.checkBoxC = BooleanVar()
Checkbutton(self,
text="ABC 601",
variable=self.checkBoxC,
command=self.update_text
).grid(row=4, column=0, sticky=W)
self.checkBoxD = BooleanVar()
Checkbutton(self,
text="ABC 602",
variable=self.checkBoxD,
command=self.update_text
).grid(row=5, column=0, sticky=W)
self.checkBoxE = BooleanVar()
Checkbutton(self,
text="ABC 603",
variable=self.checkBoxE,
command=self.update_text
).grid(row=6, column=0, sticky=W)
self.checkBoxF = BooleanVar()
Checkbutton(self,
text="ABC 701",
variable=self.checkBoxF,
command=self.update_text
).grid(row=7, column=0, sticky=W)
self.results_txt = Text(self, width=80, height=10, wrap=WORD)
self.results_txt.grid(row=8, column=0, columnspan=3)
Label(self, text="Which focus are you enrolled in?"
).grid(row=1, column=1, sticky=W)
self.checkBoxF1 = BooleanVar()
Checkbutton(self,
text="Focus #1",
variable=self.checkBoxF1,
command=self.update_text
).grid(row=2, column=1, sticky=W)
# if self.checkBoxF1.get():
# self.checkBoxF1A = BooleanVar()
# Checkbutton(self,
# text="ABC 503",
# variable=self.checkBoxF1A,
# command=self.update_text
# ).grid(row=3, column=1, sticky=W)
def update_text(self):
courses = ""
counter = 0
focusCounter = 0
##The checkboxes for the focus courses do not display text at the bottom
##The ABC 702 checkbox randomly appears when clicking core courses
##Is this related to reusing self vs creating another attribute?
if self.checkBoxF1.get():
self.checkBoxF1A = BooleanVar()
Checkbutton(self,
text="ABC 503",
variable=self.checkBoxF1A,
command=self.update_text
).grid(row=3, column=1, sticky=W)
self.checkBoxF1B = BooleanVar()
Checkbutton(self,
text="ABC 504",
variable=self.checkBoxF1B,
command=self.update_text
).grid(row=4, column=1, sticky=W)
self.checkBoxF1C = BooleanVar()
Checkbutton(self,
text="ABC 505",
variable=self.checkBoxF1C,
command=self.update_text
).grid(row=5, column=1, sticky=W)
self.checkBoxF1D = BooleanVar()
Checkbutton(self,
text="ABC 702",
variable=self.checkBoxF1D,
command=self.update_text
).grid(row=6, column=1, sticky=W)
if self.checkBoxA.get():
courses += "Introductory class \n"
counter += 1
if self.checkBoxB.get():
courses += "Next level class description \n"
counter += 1
if self.checkBoxC.get():
courses += "Core class #3 \n"
counter += 1
if self.checkBoxD.get():
courses += "Another core class \n"
counter += 1
if self.checkBoxE.get():
courses += "A higher level class \n"
counter += 1
if self.checkBoxF.get():
courses += "An advanced class \n"
counter += 1
if self.checkBoxF1A.get():
specialty = "Focused class #1"
focusCounter += 1
if self.checkBoxF1B.get():
specialty = "Focused class #2"
focusCounter += 1
if self.checkBoxF1C.get():
specialty = "Focused class #3"
focusCounter += 1
if self.checkBoxF1D.get():
specialty = "Focused class #4"
focusCounter += 1
self.results_txt.delete(0.0, END)
self.results_txt.insert(0.0, courses)
if focusCounter > 0: #this means the user selected at least 1 focus course
self.results_txt.insert(0.0, specialty)
if counter == 6:
congrats = ("\n Congratulations on completing all of your core courses! \n \n")
self.results_txt.insert(0.0, congrats)
# print(focusCounter)
root = Tk()
root.title("This is where the title goes")
app = Application(root)
root.mainloop()
答案 0 :(得分：0)
如果您首先点击复选框Focus #1，则会显示新的复选框，并且它们按预期工作
但如果您先单击其他复选框，则会收到错误消息
AttributeError：＆＃39;应用程序＆＃39;对象没有属性＆＃39; checkBoxF1A＆＃39;
问题是因为update_text() checkBoxF1A使用了checkBoxF1B，if self.checkBoxF1A.get():
specialty = "Focused class #1"
focusCounter += 1
等等，即使它们还不存在。
self.checkBoxF1A = BooleanVar()在create_widgets()中创建if self.checkBoxF1.get() - 不在grid()中，您就不会有问题。
您甚至可以在create_widgets()
self.checkbutton_F1 = Checkbuttons(...)
的复选框
if self.checkBoxF1A.get():并在self.checkbutton_F1.grid(...)中使用else:来显示小部件和（在self.checkbutton_F1.grid_forget()）Key中隐藏它。