python 네트워크 그림 을 열 고 크기 조정

# -*- coding:utf-8 -*-
''' tk_image_view_url_io_resize.py
display an image from a URL using Tkinter, PIL and data_stream
also resize the web image to fit a certain size display widget
retaining its aspect ratio
Pil facilitates resizing and allows file formats other then gif
tested with Python27 and Python33 by vegaseat 18mar2013
'''
''' tk_image_view_url_io_resize.py
 Tkinter, PIL data_stream   url      ，
             ， Pil             ，
 Python27 Python33       by vegaseat 18mar2013
'''

import io
from PIL import Image, ImageTk
try:
  # Python2
  import Tkinter as tk
  from urllib2 import urlopen
except ImportError:
  # Python3
  import tkinter as tk
  from urllib.request import urlopen
def resize(w, h, w_box, h_box, pil_image):
  '''
  resize a pil_image object so it will fit into
  a box of size w_box times h_box, but retain aspect ratio
     pil_image      ，         ，      
  '''
  
  
  f1 = 1.0*w_box/w # 1.0 forces float division in Python2
  f2 = 1.0*h_box/h
  factor = min([f1, f2])
  #print(f1, f2, factor) # test
  # use best down-sizing filter
  width = int(w*factor)
  height = int(h*factor)
  return pil_image.resize((width, height), Image.ANTIALIAS)

root = tk.Tk()
# size of image display box you want
#         
w_box = 400
h_box = 400
# find yourself a picture on an internet web page you like
# (right click on the picture, under properties copy the address)
# a larger (1600 x 1200) picture from the internet
# url name is long, so split it
#          ，      ，      ，     
url1 = "http://freeflowerpictures.net/image/flowers/petunia/"
url2 = "petunia-flower.jpg"
url = url1 + url2
image_bytes = urlopen(url).read()
# internal data file
data_stream = io.BytesIO(image_bytes)

# open as a PIL image object
#   PIL      
pil_image = Image.open(data_stream)

# get the size of the image
#         
w, h = pil_image.size

# resize the image so it retains its aspect ration
# but fits into the specified display box
#          ，             
pil_image_resized = resize(w, h, w_box, h_box, pil_image)

# optionally show resized image info ...
# get the size of the resized image
#              ，    
wr, hr = pil_image_resized.size

# split off image file name
#      ：            
fname = url.split('/')[-1]
sf = "resized {} ({}x{})".format(fname, wr, hr)
root.title(sf)

# convert PIL image object to Tkinter PhotoImage object
#  PIL       Tkinter PhotoImage  
tk_image = ImageTk.PhotoImage(pil_image_resized)

# put the image on a widget the size of the specified display box
# Label:      ，      ，   ，               
label = tk.Label(root, image=tk_image, width=w_box, height=h_box)
#padx,pady            
label.pack(padx=5, pady=5)
root.mainloop()