需要验证名称重量和高度条目的输入

Question

https://github.com/Rodneyst/lv100roxas-gmail.com/blob/master/finalproject

可以在这里查看完整的代码。链接到完整的代码，我使用stringvar一键提取所有答案。请回答，我还有两天，运气不好。

# Username widget
self.prompt_label5 = tkinter.Label(self.top_frame,
text='Enter your Name:' ,bg="red", fg="yellow", font="none 12 bold")            
self.name_entry = tkinter.Entry(self.top_frame,
width=10)
# weight widget
self.prompt_label1 = tkinter.Label(self.top_frame,
text='Enter your weight(lbs):' ,bg="red", fg="yellow", font="none 12 bold")            
self.weight_entry = tkinter.Entry(self.top_frame,
width=10)
def getworkout(self):
weight = float(self.weight_entry.get())
height = float(self.height_entry.get())

我将如何验证这些用户输入？请帮忙，我想不通。我想获得一个弹出窗口，显示用户何时为name输入整数，以及何时为weight和height、ValueErrors输入字符串。请帮忙！

Answer 1

代码很乱，所以让它看起来更好：(但我认为确实如此，正如你所问的。我匆匆编辑了一下。名称还接受更多的符号，而不仅仅是字母(不包括整数(——如果需要，很容易进行验证。

import tkinter
from tkinter import ttk
from tkinter import messagebox
import random

# GUI
class WorkoutGUI:
def __init__(self):
# Main window
self.main_window = tkinter.Tk()
self.main_window.title("Workout Generator")
self.main_window.geometry('1200x600')
# Frames
self.top_frame = tkinter.Frame()
self.mid_frame = tkinter.Frame()
self.bottom_frame = tkinter.Frame()
validation1 = self.top_frame.register(entry_validation_1)
validation2 = self.top_frame.register(entry_validation_2)
# TOP FRAME
# username widget
self.prompt_label1 = tkinter.Label(self.top_frame,
text='Enter your Name:', bg="red", fg="yellow", font="none 12 bold")
self.name_entry = tkinter.Entry(self.top_frame,
width=10, validate='key', validatecommand=(validation1, '%S'))
# weight widget
self.prompt_label2 = tkinter.Label(self.top_frame,
text='Enter your weight(lbs):', bg="red", fg="yellow", font="none 12 bold")
self.weight_entry = tkinter.Entry(self.top_frame,
width=10, validate='key', validatecommand=(validation2, '%S'))
# height widget
self.prompt_label3 = tkinter.Label(self.top_frame,
text='Enter your height(in):', bg="red", fg="yellow",
font="none 12 bold")
self.height_entry = tkinter.Entry(self.top_frame,
width=10, validate='key', validatecommand=(validation2, '%S'))
# gender widget
self.prompt_label4 = tkinter.Label(self.top_frame,
text='Select your gender:', bg="red", fg="yellow",
font="none 12 bold")
self.gender_entry = tkinter.IntVar()
self.gender_entry.set(1)
# radio buttons for gender choice
self.rb1 = tkinter.Radiobutton(self.top_frame,
text='Male',
variable=self.gender_entry,
value=1)
self.rb2 = tkinter.Radiobutton(self.top_frame,
text='Female',
variable=self.gender_entry,
value=2)
# goal widget
self.prompt_label5 = tkinter.Label(self.top_frame,
text='Select your goal:', bg="red", fg="yellow",
font="none 12 bold")
self.goal_entry = tkinter.IntVar()
self.goal_entry.set(1)
# radio buttons for goal choice
self.rb3 = tkinter.Radiobutton(self.top_frame,
text='Lose Weight',
variable=self.goal_entry,
value=1)
self.rb4 = tkinter.Radiobutton(self.top_frame,
text='Maintain',
variable=self.goal_entry,
value=2)
self.rb5 = tkinter.Radiobutton(self.top_frame,
text='Build Muscle Mass',
variable=self.goal_entry,
value=3)
# packing widgets
self.prompt_label1.pack(side='top')
self.name_entry.pack(side='top')
self.prompt_label2.pack(side='top')
self.weight_entry.pack(side='top')
self.prompt_label3.pack(side='top')
self.height_entry.pack(side='top')
self.prompt_label4.pack(side='top')
self.rb1.pack(side='top')
self.rb2.pack(side='top')
self.prompt_label5.pack(side='left')
self.rb3.pack(side='left')
self.rb4.pack(side='left')
self.rb5.pack(side='left')
# MIDDLE FRAME
self.descr_label = tkinter.Label(self.mid_frame,
text='Workout for you:')
self.value = tkinter.StringVar()
self.workout_label = tkinter.Label(self.mid_frame,
textvariable=self.value,
width=250, height=20, bg="white")
# packing widgets
self.descr_label.pack(side='top')
self.workout_label.pack(side='bottom')
# BOTTOM FRAME
# buttons
self.display_button = tkinter.Button(self.bottom_frame,
text='Get Workout!',
command=self.getworkout)
self.quit_button = tkinter.Button(self.bottom_frame,
text='Quit',
command=self.main_window.destroy)
# pack the buttons
self.display_button.pack(side='left')
self.quit_button.pack(side='right')
# packing frames
self.top_frame.pack()
self.mid_frame.pack()
self.bottom_frame.pack()
# fucnction to get outputs
def getworkout(self):
# Gather User information
name = str(self.name_entry.get())
gymSerial = random.randint(0, 10000)
weight = float(self.weight_entry.get())
height = float(self.height_entry.get())
gender = (self.gender_entry.get())
goal = (self.goal_entry.get())

def entry_validation_1(x):
if x.isdecimal():
messagebox.showwarning("Wrong input!", "Name must be a string - not integer.")
return False
else:
return True

def entry_validation_2(y):
if y.isdecimal():
return True
else:
messagebox.showwarning("Wrong input!", "Weight and height must be a numerical value - not string")
return False

def main():
root = tkinter.Tk()
ex = WorkoutGUI()
root.mainloop()

if __name__ == '__main__':
main()

Answer 2

链接不起作用，但我写了自己的代码作为示例。我认为它非常接近你所需要的。这种方法被称为条目验证，你可以在这里找到更多信息：

https://anzeljg.github.io/rin2/book2/2405/docs/tkinter/entry-validation.html

如果您有任何顾虑，请随时询问：(

import tkinter as tk
from tkinter import ttk
from tkinter import messagebox
# tkinter main window
root = tk.Tk()
root.title('Validation')
root.geometry('300x300')

def entry_validation_1(x):
if x.isdecimal():
messagebox.showwarning("Wrong input!", "Name must be a string - not integer.")
return False
else:
return True

def entry_validation_2(y):
if y.isdecimal():
return True
else:
messagebox.showwarning("Wrong input!", "Weight and height must be a numerical value - not string")
return False

validation1 = root.register(entry_validation_1)
validation2 = root.register(entry_validation_2)
name = tk.Entry(root, width='9', justify='center', validate='key', validatecommand=(validation1, '%S'))
weight_or_height = tk.Entry(root, width='9', justify='center', validate='key', validatecommand=(validation2, '%S'))
label_name = tk.Label(root, text='name - INTEGER NOT ACCEPTED')
label_weight_or_height = tk.Label(root, text='weight or height - STRING NOT ACCEPTED')

name.grid(row=0, column=0, padx=0, pady=0)
label_name.grid(row=0, column=1, padx=0, pady=0)
weight_or_height.grid(row=1, column=0, padx=0, pady=0)
label_weight_or_height.grid(row=1, column=1, padx=0, pady=0)
tk.mainloop()