如何在同一循环中添加错误警报然后返回主 function

Question

在用户搜索 excel 中未找到的值并显示错误弹出后，如何返回用户输入以在 tkinter 中重试？

在我提交的 function 下面它适用于有效条目（excel 文件中的值），但如果输入的值在 excel 文件中找不到，则在正确输入有效值时会继续显示错误，但会继续显示错误对于任何后续搜索

import tkinter
from tkinter import *
import tkinter as tk
from tkinter import scrolledtext
import openpyxl
from tkinter import messagebox


main = Tk()
main.title("Customer Search App")
main.geometry("1000x600")
main.configure(bg='blue')

excel_path = r".\Customer_Lookup.xlsx"

     
def submit():

        search_id = service_id.get()

           
        file = openpyxl.load_workbook(excel_path)

        sheet = file['Sheet1']


        for cell in sheet.iter_rows(min_row=1, max_row=sheet.max_row, 
            min_col=1, max_col=15, values_only=True):


            if cell[0] == search_id:
                date.insert(0, cell[1])
                account.insert(0, cell[2])
                name.insert(0, cell[3])
                comments.insert(1.0, cell[4])

            else:
                tk.messagebox.showerror("Error", "Service ID not found")


                break







main.mainloop()

Answer 1

我现在意识到出了什么问题，我在 for 循环之外还需要第二个 if 语句，也不需要 break 语句

Answer 2

对于弹出警告，使用from tkinter import *您已加载 tkinter 的所有tkinter ， messagebox未导入

from tkinter import messagebox
#warning
messagebox.showinfo(title="warning" ,message="please make sure haven't left any field empty !")
# confirmation
is_ok=messagebox.askokcancel(title=website,message=f"these are details entered : website:{website}\n Email:{email} \n Password : {password} \n is it ok for save ?")

第二个问题你应该学习错误和异常
假设我们要提取类似数据的计数
并跳过每个没有喜欢关键字的记录数据

facebook_posts = [
    {'Likes': 21, 'Comments': 2},
    {'Likes': 13, 'Comments': 2, 'Shares': 1},
    {'Likes': 33, 'Comments': 8, 'Shares': 3},
    {'Comments': 4, 'Shares': 2}, # dont have likes data
    {'Comments': 1, 'Shares': 1},#dont have likes data
    {'Likes': 19, 'Comments': 3}
]
total_likes = 0
for post in facebook_posts:
    try:
         total_likes = total_likes + post['Likes']
    except KeyError:
         pass

print(total_likes)

如果有问题想在错误数据后抛出错误

def bmi():
    height=float(input("inter your height meter ? : "))
    if height>3:
        raise ValueError("your height shouldn't be over 3 meter")
    weight=float(input("inter your weight kg ? : "))
    bmi=weight/height**2
    bmi=round(bmi,2)
    print(f"your bmi is {bmi}")