问我试着用tkinter和pysrt制作一个GUI应用程序

EN

from tkinter import filedialog, font
from  tkinter import *
from tkinter import ttk
root = Tk()
root.geometry("300x100")
root.title("SRT")
root.resizable(False, False)
frame = Frame(root)
frame.grid(column=1, row =0)
def open():
    b.destroy()
    filename1 =  filedialog.askopenfilename(filetypes=[("SRT files(*.srt)", "*.srt")],initialdir = "/", title = "Select file")
    root.geometry("775x300")
    k=Label(frame,text="SELECTED SUBTITLE",font=("Times New Roman", 15)).grid(column=3, row =0)
    y=Label(frame,text=filename1,font=("Times New Roman", 12)).grid(column=3, row =1)
    seconds=Label(root, font=("Times New Roman", 15),text="Seconds").grid(column=2,row=2)
    minutes=Label(root, font=("Times New Roman", 15),text="Minutes").grid(column=0,row=2,ipadx=20)
    minuteselect = StringVar()
    minutes = ttk.Combobox(root, textvariable=minuteselect)
    minutes['values']=tuple([i for i in range(1,61)])
    minutes['state'] = 'readonly' 
    minutes.grid(column=0,row=4,padx=10)
    secondselect = StringVar()
    seconds = ttk.Combobox(root, textvariable=secondselect)
    seconds['values']=tuple([i for i in range(1,61)])
    seconds['state'] = 'readonly' 
    seconds.grid(column=2,row=4)
    plus =Button(root,text="DECREASE", width='10', height='1').place(x=400,y=150)
    minus =Button(root,text="INCREASE", width='10', height='1').place(x=280,y=150)
b =Button(frame,text="Select The Subtitle", width='30', height='1',command=open)
b.grid(row=1, column=1,padx=41,pady=30)
b.rowconfigure(1, weight=1)
b.columnconfigure(1, weight=1)
root.mainloop()