我試圖用 Tkinter 和 Python3 制作一個影像幻燈片程式。沒有錯誤，但沒有顯示我選擇的目錄中的影像。我使用的其他庫是：PIL、random 和 glob。對你的幫助表示感謝。
我的系統：
Ubuntu 20.04 LTS
這是代碼：
import tkinter as Tk
from PIL import Image, ImageTk
import random
import glob
class gui:
def __init__(self, mainwin):
self.counter = 0
self.mainwin = mainwin
self.mainwin.title("Our Photos")
self.colour()
self.mainwin.configure(bg = "yellow")
self.Frame = Tk.Frame(mainwin)
self.img = Tk.Label(self.Frame)
self.Frame.place(relheight = 0.85, relwidth = 0.9, relx = 0.05, rely = 0.05 )
self.img.pack()
self.pic()
def colour(self):
self.colours =['gray47','gray48']
c = random.choice(self.colours)
self.mainwin.configure(bg = c)
root.after(4000, self.colour)
def pic(self):
for name in glob.glob(r"/home/maheswar/Pictures/*"):
self.pic_list = []
val = name
self.pic_list.append(val)
if self.counter == len(self.pic_list) - 1:
self.counter = 0
else:
self.counter == self.counter 1
self.file = self.pic_list[self.counter]
self.load = Image.open(self.file)
self.pic_width = self.load.size[0]
self.pic_height = self.load.size[1]
self.real_aspect = self.pic_width/self.pic_height
self.calc_width = int(self.real_aspect * 800)
self.load2 = self.load.resize((self.calc_width, 800))
self.render = ImageTk.PhotoImage(self.load2)
self.img.config(image = self.render)
self.img.image = self.render
root.after(2000, self.pic)
root = Tk.Tk()
myprog = gui(root)
root.geometry("1000x1000")
root.mainloop()
uj5u.com熱心網友回復：
我發現了兩個錯誤——你可能會看到你是否會用它print()來除錯代碼
首先：您在回圈內創建串列self.pic_list = []，以便替換以前的內容，這樣您只能獲得一個串列。但是你不需要這個回圈，而是直接
self.pic_list = glob.glob(r"/home/maheswar/Pictures/*")
第二：你需要=而不是==排隊self.counter = self.counter 1甚至更簡單
self.counter = 1
完整的作業代碼，改動很小。
import tkinter as Tk
from PIL import Image, ImageTk
import random
import glob
class GUI: # PEP8: `CamelCaseNames` for classes
def __init__(self, mainwin):
self.mainwin = mainwin
self.mainwin.title("Our Photos")
self.mainwin.configure(bg="yellow") # PEP8: inside `()` use `=` without spaces
self.counter = 0
self.frame = Tk.Frame(mainwin) # PEP8: `lower_case_names` for variables
self.frame.place(relheight=0.85, relwidth=0.9, relx=0.05, rely=0.05)
self.img = Tk.Label(self.frame)
self.img.pack()
self.pic_list = glob.glob("/home/maheswar/Pictures/*") # no need prefix `r`
self.colours = ['gray47', 'gray48'] # PEP8: space after `,`
self.colour()
self.pic()
def colour(self):
selected = random.choice(self.colours)
self.mainwin.configure(bg=selected)
root.after(4000, self.colour)
def pic(self):
filename = self.pic_list[self.counter]
image = Image.open(filename)
real_aspect = image.size[0]/image.size[1]
width = int(real_aspect * 800)
image = image.resize((width, 800))
self.photo = ImageTk.PhotoImage(image)
self.img.config(image=self.photo)
#self.img.image = self.render no need if you use `self.` to keep PhotoImage
self.counter = 1
if self.counter >= len(self.pic_list):
self.counter = 0
root.after(2000, self.pic)
# --- main ---
root = Tk.Tk()
myprog = GUI(root)
root.geometry("1000x1000")
root.mainloop()
PEP 8——Python 代碼風格指南
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