我想显示“正在加载...”,然后在用户等待时执行脚本。
我知道画布只能在每个循环之后进行更新,并且在调用按钮命令时画布被冻结。
我该如何解决?
当前,没有文本出现。成功文本确实出现。
import tkinter as tk
import main
root = tk.Tk() # create GUI instance
root.title('Exam Closeout') # name GUI
def run_script():
'''
Run the script from main, that is, the data script.
:return: void
'''
# show loading status: currently doesn't work, need to understand queue better
current_text = tk.StringVar()
current_text.set('Loading...')
tk.Label(root, textvariable=current_text).grid(row=4, column=1, sticky='w')
subject = entry_1.get() # grab subject from user input
try:
# call main
main.test(subject)
# show finish status
current_text.set('Script successfully finished. You may exit out of this window now')
except Exception as e: # catch exceptions. currently doesn't show specific exception
current_text.set("Error occurred. Try looking at documentation")
# label with instructions
tk.Label(root, text="Thank you for using me...").grid(row=1, column=1, sticky='w')
# label to show users where to enter exam
tk.Label(root, text="Enter exam code:").grid(row=2, column=1, sticky='w')
# blank box to enter exam into
entry_1 = tk.Entry(root,width=40) # entry has to be its own line - for more, see below
entry_1.grid(row=2, column=2, columnspan=2)
# button to run script
tk.Button(root,text="Run", command=run_script).grid(row=3, column=3)
# start canvas
root.mainloop()
main.py
import time
def test(exam):
time.sleep(5)
print(exam)
如果很重要,主要方法实际上是一个数据分析脚本,它接收数据框,对其进行操作并导出Excel数据集。
在下面指示的位置添加对通用update_idletasks()
小部件方法的调用:
update_idletasks()
您可以为脚本启动一个新线程,但是当用户在运行程序时退出该程序时,您必须处理这种情况,但是这个想法是:
def run_script():
'''
Run the script from main, that is, the data script.
:return: void
'''
# show loading status: currently doesn't work, need to understand queue better
current_text = tk.StringVar()
current_text.set('Loading...')
tk.Label(root, textvariable=current_text).grid(row=4, column=1, sticky='w')
subject = entry_1.get() # grab subject from user input
try:
root.update_idletasks() #### ADD THIS LINE.
# call main
main.test(subject)
# show finish status
current_text.set('Script successfully finished. You may exit out of this window now')
except Exception as e: # catch exceptions. currently doesn't show specific exception
current_text.set("Error occurred. Try looking at documentation")