如何在 Tkinter 中为函数添加进度条

Question

我创建了 2 个使用 tkinter 库导入 Excel 文件的按钮。我还为每个相应的按钮创建了函数，以便当用户单击该按钮时该函数将运行。所有按钮都工作正常，但我想知道如何为每个按钮添加进度条，以便用户可以看到何时导入文件和执行代码。我查看了其他类似的帖子，但并没有真正的帮助。

这是我的代码：

from tkinter import *
from tkinter import filedialog
import pandas as pd
import numpy as np
from tkinter import ttk

def open_ec_file():
    global ec_df
    #pandas code goes here

def open_lms_file():
    global lms_df
    #pandas code goes here

window = Tk()
#Set title
window.title ('Report Generator')
# Set window size
window.geometry("800x500")
# add logo
window.iconbitmap('logo.ico')

Button(window, text = 'Import EC employee data', command = open_ec_file, bg = 'red', fg = 'white',
       height = 2, font = 'none 14 bold') .grid(row = 2, sticky = E, padx = 6, pady = 8 )
Button(window, text = 'Import LMS data', command = open_lms_file, bg = 'red', fg = 'white',
       font = 'none 14 bold') .grid(row = 4, column = 5, sticky = E, padx = 6, pady = 8 )

Answer 1

如果您可以选择在代码中的某些点手动更新进度条，我会执行以下操作：

from tkinter import *
from tkinter import ttk
import time


def update_progress(value):
    progress_bar["value"] = value
    window.update()


def your_time_consuming_function():
    print("Starting function")
    update_progress(0)
    time.sleep(2)
    print("I reached my first checkpoint")
    update_progress(25)
    time.sleep(2)
    print("Another checkpoint, yay")
    update_progress(50)
    time.sleep(2)
    print("Only 1 more to go")
    update_progress(75)
    time.sleep(2)
    print("Yay im finished")
    update_progress(100)


window = Tk()
#Set title
window.title ('Report Generator')
# Set window size
window.geometry("800x500")
# add logo
# window.iconbitmap('logo.ico')

progress_bar = ttk.Progressbar(window, length=100, mode="determinate", orient="horizontal")
progress_bar.grid(row=99, column=0, sticky=E, padx=2, pady=2)

Button(window, text='Test progressbar', command=your_time_consuming_function, bg='red', fg='white',
       height=2, font='none 14 bold').grid(row=2, sticky=E, padx=6, pady=8 )

window.mainloop()

您可以通过调用update_progress(value) 为任何功能使用相同的进度条。