Python图形界面 Tkinter入门4

4.1消息框

from tkinter import *
from PIL import ImageTk,Image
from tkinter import messagebox

root= Tk()
root.title('消息框')
# showinfo 提醒
# showerror 错误x
# showwarning  感叹号
# askquestion --yes/no       askyesno  -- 1/0
def popup():
    sms = messagebox.askyesno('登录窗口','你好，达菲！')
    if sms == 1:
        Label(root,text='yes').pack()
    else:
        Label(root,text='no').pack()

Button(root,text='登录',command=popup).pack()
mainloop()

4.2新窗口

from tkinter import *
from PIL import ImageTk,Image

root= Tk()
root.title('主窗口')


def open():
    global my_immg
    LEFT = LEFTlevel()
    LEFT.title('子窗口')
    my_immg = ImageTk.PhotoImage(Image.open('./jpg/1.jpg'))
    Label(LEFT, image=my_immg).pack()
    Button(LEFT,text='关闭',command=LEFT.destroy).pack()



btn = Button(root,text='子窗口',command=open)
btn.pack()



mainloop()

4.3打开文件框

from tkinter import *
from PIL import ImageTk,Image
from tkinter import filedialog

root= Tk()
root.title('主窗口')


def open_file():
    global my_img
    root.filename = filedialog.askopenfilename(initialdir='/jpg', title='选择文件',filetypes=(('jpg文件', '*.jpg'), ('所有文件', '*.*')))
    Label(root, text=root.filename).pack()
    my_img = ImageTk.PhotoImage(Image.open(root.filename))
    Label(image=my_img).pack()



btn = Button(root,text='打开文件',command=open_file).pack()

root.mainloop()