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我创建一个程序,允许用户选择一个类别,并输入一个值来计算收费文本输入。我想验证文本条目使用我自己的验证文件。但是,当我运行该程序并在文本输入中不输入任何内容时,错误窗口不断弹出一遍又一遍。另外,当我运行程序并在输入字段中输入一个有效数字时,即使我已经定义了总费用的计算,费用也会达到0.0。验证上的Tkinter
下面是程序:
import tkinter
import tkinter.messagebox
import ValidationFile
validationObject = ValidationFile.ValidationClass()
class MyGUI:
def __init__ (self):
self.main_window = tkinter.Tk()
self.top_frame = tkinter.Frame (self.main_window)
self.middle_frame = tkinter.Frame (self.main_window)
self.bottom_frame = tkinter.Frame (self.main_window)
self.phone_var = tkinter.IntVar()
self.phone_var.set (1)
self.pb1 = tkinter.Radiobutton (self.top_frame, \
text = 'Daytime (6:00 AM - 5:59 PM)', variable = self.phone_var, \
value = 0.12)
self.pb2 = tkinter.Radiobutton (self.top_frame, \
text = 'Evening (6:00 PM - 11:59 PM)', variable = self.phone_var, \
value = 0.07)
self.pb3 = tkinter.Radiobutton (self.top_frame, \
text = 'Off-Peak (Midnight - 5:50 AM)', variable = self.phone_var, \
value = 0.05)
#pack phone buttons
self.pb1.pack()
self.pb2.pack()
self.pb3.pack()
#create input and output buttons
self.txtInput = tkinter.Entry (self.middle_frame, \
width = 10)
self.value = tkinter.StringVar()
self.lblOutput = tkinter.Label (self.middle_frame, \
width = 10, textvariable = self.value)
self.txtInput.pack()
self.lblOutput.pack()
#create OK buton and QUIT button
self.ok_button = tkinter.Button (self.bottom_frame, \
text = 'OK', command = self.show_choice)
self.quit_button = tkinter.Button (self.bottom_frame, \
text = 'QUIT', command = self.main_window.destroy)
#pack the buttons
self.ok_button.pack (side = 'left')
self.quit_button.pack (side = 'left')
#pack the frames
self.top_frame.pack()
self.middle_frame.pack()
self.bottom_frame.pack()
#start the mainloop
tkinter.mainloop()
def show_choice (self):
choice = self.phone_var.get()
value = -1
while value == -1:
valueEntry = self.txtInput.get()
if valueEntry == '':
value = -1
tkinter.messagebox.showinfo (title = 'ERROR', \
message = 'Please enter a valid number.')
else:
value = validationObject.checkFloat (valueEntry)
total = choice * value
self.value.set (total)
#create instance of MyGUI class
my_GUI = MyGUI()
这里是验证文件:
#create validation class
class ValidationClass:
def checkFloat (self, inputString):
try:
result = float (inputString)
except Exception:
return -1
if result < 0:
return -1
else:
return result
def checkInteger (self, inputString):
try:
result = int (inputString)
except Exception:
return -1
if result < 0:
return -1
else:
return result