raspberry pi3 b+ slideshow program not working - python-3.x

Question

I wanted to turn my raspberry pi into a slideshow device but I barely know python 3 could anyone help me fix this code I found online? It's supposed to display the images in the list I created but it doesn't run. The only changes I made to this code was the creation of the list so I have no idea why it does not work. The error I'm getting is
Traceback (most recent call last):
File "bro.py", line 82, in <module>
slideshow.start()
File "bro.py", line 56, in start
self.main()
File "bro.py", line 48, in main
self.set_image()
File "bro.py", line 42, in set_image
self.image_name = next(self.images)
StopIteration
Here is the code:
#!/usr/bin/env python3
"""Display a slideshow from a list of filenames"""
import os
import tkinter
from itertools import cycle
from PIL import Image, ImageTk
class Slideshow(tkinter.Tk):
"""Display a slideshow from a list of filenames"""
def __init__(self, images, slide_interval):
"""Initialize
images = a list of filename
slide_interval = milliseconds to display image
"""
tkinter.Tk.__init__(self)
self.geometry("+0+0")
self.slide_interval = slide_interval
self.images = images
self.set_images(images)
self.slide = tkinter.Label(self)
self.slide.pack()
def set_images(self, images):
self.images = cycle(images)
def center(self):
"""Center the slide window on the screen"""
self.update_idletasks()
w = self.winfo_screenwidth()
h = self.winfo_screenheight()
size = tuple(int(_) for _ in self.geometry().split('+')[0].split('x'))
x = w / 2 - size[0] / 2
y = h / 2 - size[1] / 2
self.geometry("+%d+%d" % (x, y))
def set_image(self):
"""Setup image to be displayed"""
self.image_name = next(self.images)
filename, ext = os.path.splitext(self.image_name)
self.image = ImageTk.PhotoImage(Image.open(self.image_name))
def main(self):
"""Display the images"""
self.set_image()
self.slide.config(image=self.image)
self.title(self.image_name)
self.center()
self.after(self.slide_interval, self.start)
def start(self):
"""Start method"""
self.main()
self.mainloop()
if __name__ == "__main__":
slide_interval = 2500
# use a list
images = [
"/~/definitely/1550099164562.png",
"/~/definitely/1550770995551.png",
"/~/definitely/1550771217013.png",
"/~/definitely/1550771726391.jpg"]
# all the specified file types in a directory
# "." us the directory the script is in.
# exts is the file extentions to use. it can be any extention that pillow supports
# http://pillow.readthedocs.io/en/3.3.x/handbook/image-file-formats.html
import glob
images = glob.glob("*.jpg")
path = "."
exts = ["jpg", "bmp", "png", "gif", "jpeg"]
images = [fn for fn in os.listdir(path) if any(fn.endswith(ext) for ext in exts)]
# start the slideshow
slideshow = Slideshow(images, slide_interval)
slideshow.start()

Answer 1

Try next(iter(images)) instead of next(images).
BTW, I have Raspberry Pi slideshows for both Tkinter and Kivy on my tachyonlabs GitHub ... they also download photos from Instagram, but if you don't hook that up or there's no Internet connection they will just cycle through the images in the image directory you specify, with your chosen order and duration.