python随机点名-图片版

先创建图片文件夹，图片名就是用户名

from tkinter import *
from PIL import Image, ImageTk
import time,random,os

class RandomName(Frame):
    def __init__(self, parent=None, **kw):
        Frame.__init__(self, parent, kw)
        self._timer = None
        self._start = 0.0
        self._elapsedtime = 0.0
        self._running = False
        self.timestr = StringVar()
        self.makeWidgets()

    def makeWidgets(self):
        self.label = Label(self, textvariable=self.timestr, font=("思源宋体", 45), pady=50)
        self.label.pack(side=TOP)
        self.image_label = Label(self)
        self.image_label.pack()
        self.set_name(self._elapsedtime)

    def update(self):
        self._elapsedtime = time.time() - self._start
        self.set_name(self._elapsedtime)
        self._timer = self.after(50, self.update)

    def set_name(self, elap):
        #cur = int(elap * 100 % len(name_list))
        # 从用户列表随机一个
        cur = random.randint(0, len(name_list) - 1)
        username = name_list[cur]
        image_path = os.path.join(images_folder, username + ".png")
        self.timestr.set(username)
        # 设置图片
        image = Image.open(image_path)
        image = image.resize((200, 200))
        photo = ImageTk.PhotoImage(image)
        self.image_label.configure(image=photo)
        self.image_label.image = photo

    def start(self):
        if not self._running:
            self._start = time.time() - self._elapsedtime
            self.update()
            self._running = True
    def stop(self):
        if self._running:
            self.after_cancel(self._timer)
            self._elapsedtime = time.time() - self._start
            self.set_name(self._elapsedtime)
            self._running = False

    def name_label(self):
        self.pack(side=TOP)
        Button(self, text='开始', command=self.start, width=10, height=2, bg="SeaGreen", font=("思源宋体", 13)).pack(
            side=LEFT)
        Button(self, text='结束', command=self.stop, width=10, height=2, bg="Red", font=("思源宋体", 13)).pack(
            side=LEFT)


# 图片文件夹
images_folder = "./students"

# 把用户名抽出来
name_list = [os.path.splitext(img)[0] for img in os.listdir(images_folder) if img.endswith('.png')]

if __name__ == '__main__':
    root = Tk()
    root.title("随机点名")
    root.geometry('400x500')
    root.resizable(0, 0)
    sw = RandomName(root)
    sw.name_label()
    root.mainloop()