使用 Tkinter 显示图像 [英] Displaying images with Tkinter
问题描述
我正在开发一个使用 Tkinter 和 ImageTk 显示一系列图像的 Python 程序.我无法显示多个图像.下面是一个重现错误的小型完整程序.程序直接递归搜索当前的jpg文件，并在用户按回车时显示.
I am working on a python program that displays a series of images using Tkinter and ImageTk. I have not been able to display more than a single image. Below is a small complete program that reproduces the error. The program searches the current directly recursively for jpg files, and displays them as the uses presses Enter.
import Tkinter, ImageTk,os, re
def ls_rec(direc):
try:
ls = os.listdir(direc)
except Exception as e:
return
for f in os.listdir(direc):
fpath = os.path.join(direc, f)
if os.path.isfile(fpath):
yield fpath
elif os.path.isdir(fpath):
for f2 in iterate_dir(os.path.join(direc,f)):
yield f2
images = filter(lambda a:re.match('.*\\.jpg$',a),ls_rec(os.getcwd()))
assert(len(images)>10)
top = Tkinter.Tk()
image_label = Tkinter.Label(top)
Label_text = Tkinter.Label(top,text="Below is an image")
img = None
i = 0
def get_next_image(event = None):
global i, img
i+=1
img = ImageTk.PhotoImage(images[i])
label.config(image=img)
label.image = img
top.bind('<Enter>',get_next_image)
label.pack(side='bottom')
Label_text.pack(side='top')
get_next_image()
top.mainloop()
程序失败并显示以下回溯:
The program fails with the following traceback:
Traceback (most recent call last):
File "/usr/lib/python2.7/pdb.py", line 1314, in main
pdb._runscript(mainpyfile)
File "/usr/lib/python2.7/pdb.py", line 1233, in _runscript
self.run(statement)
File "/usr/lib/python2.7/bdb.py", line 387, in run
exec cmd in globals, locals
File "<string>", line 1, in <module>
File "/home/myuser/Projects/sample_images.py", line 1, in <module>
import Tkinter, ImageTk,os, re
File "/home/myuser/Projects/sample_images.py", line 32, in get_next_image
img = ImageTk.PhotoImage(some_image[1])
File "/usr/lib/python2.7/dist-packages/PIL/ImageTk.py", line 109, in __init__
mode = Image.getmodebase(mode)
File "/usr/lib/python2.7/dist-packages/PIL/Image.py", line 245, in getmodebase
return ImageMode.getmode(mode).basemode
File "/usr/lib/python2.7/dist-packages/PIL/ImageMode.py", line 50, in getmode
return _modes[mode]
KeyError: '/home/myuser/sampleimage.jpg'
有没有人在运行此代码时得到相同的行为?我究竟做错了什么?
Does anyone get the same behavior when running this code? What am I doing wrong?
使用 korylprince 的解决方案，并进行一些清理，以下是原始代码的工作版本:
Using korylprince's solution, and a bit of cleaning, the following is a working version of the original code:
import os, re, Tkinter, ImageTk
def ls_rec(direc, filter_fun=lambda a:True):
for (dirname, dirnames, fnames) in os.walk(direc):
for fname in fnames:
if filter_fun(fname):
yield os.path.join(dirname,fname)
top = Tkinter.Tk()
image_label = Tkinter.Label(top)
text_label = Tkinter.Label(top,text="Below is an image")
images = ls_rec(os.getcwd(), lambda a:re.match('.*\\.jpg$',a))
imgL = []
def get_next_image(event = None):
fname = images.next()
print fname
fhandle = open(fname)
img = ImageTk.PhotoImage(file=fhandle)
fhandle.close()
imgL.append(img)
image_label.config(image=img)
top.bind('<Return>',get_next_image)
image_label.pack(side='bottom')
text_label.pack(side='top')
get_next_image()
top.mainloop()
Edit: top.bind(' 实际上绑定了鼠标进入框架的事件，而不是用户按下 Enter 键.正确的行是 top.bind('.
top.bind('<Enter>'...) actually bound the event of the mouse entering the frame, rather than user pressing Enter key. The correct line is top.bind('<Return>',...).
推荐答案
ImageTk.PhotoImage 没有真正正确记录.
你应该尝试这样的事情:
You should try something like this:
#outside of functions
images = list()
#inside function
global images
with open(images[i]) as f:
img = ImageTk.PhotoImage(file=f)
images.append(img)
将图片放入列表的原因是为了让python有一个对它的引用.否则垃圾回收器最终会删除图像对象.
The reason for putting the image in the list is so that python will have a reference to it. Otherwise the garbage collector will delete the image object eventually.
这篇关于使用 Tkinter 显示图像的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
