需求，圖片格式轉(zhuǎn)換，從png轉(zhuǎn)webp。擴展：用戶可選縮放率。
核心方法在于：im.resize((w, h),Image.ANTIALIAS)
代碼如下：
#!/usr/bin/python
# -*- coding: utf-8 -*-
import glob
import os
import threading
import sys
from Tkinter import *
from tkMessageBox import *
from PIL import Image
path = os.path.abspath(os.path.dirname(sys.argv[0]))
def select10():
? successSelect(10)
def select20():
? successSelect(20)
def select30():
? successSelect(30)
def select40():
? successSelect(40)
def select50():
? successSelect(50)
def select60():
? successSelect(60)
def select70():
? successSelect(70)
def select80():
? successSelect(80)
def select90():
? successSelect(90)
def selectInput():
? str = raw_input("請輸入0～100的整數(shù): ")
? if str != "":
? ? print str
? ? if str.isdigit():?
? ? ? ratio = int(str)
? ? ? successSelect(ratio)
? ? ? selectInput()
? ? else:
? ? ? print "輸入錯誤!"
? ? ? selectInput()
? else:
? ? print "輸入錯誤!"
? ? selectInput()
def selectExit():
? os._exit(0)
def successSelect(ratio):
? if os.path.exists(path+'/img_bigger_%d' % ratio) == False:
? ? os.mkdir(path+"/img_bigger_%d" % ratio)
? if os.path.exists(path+'/img_smaller_%d' % ratio) == False:
? ? os.mkdir(path+"/img_smaller_%d" % ratio)
? if ratio < 0:
? ? ratio = 0
? if ratio > 100:
? ? ratio = 100
? index = 0
? for infile in glob.glob(path+"/img/*.png"):
? ? t = threading.Thread(target=create_image, args=(infile, ratio, index,))
? ? t.start()
? ? t.join()
? ? index += 1
def create_image(infile, ratio, index):
? os.path.splitext(infile)
? im = Image.open(infile)
? w,h = im.size
? w = w*ratio//100
? h = h*ratio//100
? im = im.resize((w, h),Image.ANTIALIAS)
? (filepath,tempfilename) = os.path.split(infile)
? (filename,extension) = os.path.splitext(tempfilename)
? fullpath = path+"/img/"+filename + ".webp"
? im.save(fullpath, "WEBP")
? sizeinfile = os.path.getsize(infile)
? sizefullpath = os.path.getsize(fullpath)
? if sizeinfile > sizefullpath:
? ? im.save(path+"/img_smaller_%d/" % ratio+filename + ".webp", "WEBP")
? else:
? ? im.save(path+"/img_bigger_%d/" % ratio+filename + ".webp", "WEBP")
def start():
? Button(text='10', command=select10).pack(fill=X)
? Button(text='20', command=select20).pack(fill=X)
? Button(text='30', command=select30).pack(fill=X)
? Button(text='40', command=select40).pack(fill=X)
? Button(text='50', command=select50).pack(fill=X)
? Button(text='60', command=select60).pack(fill=X)
? Button(text='70', command=select70).pack(fill=X)
? Button(text='80', command=select80).pack(fill=X)
? Button(text='90', command=select90).pack(fill=X)
? Button(text='鍵盤輸入', command=selectInput).pack(fill=X)
? Button(text='退出', command=selectExit).pack(fill=X)
? mainloop()
if __name__ == "__main__":
? ? start()
