python⑥

Posted 2020-09-26

题目是：你有一个目录，装了很多照片，把它们的尺寸变成都不大于 iPhone5 分辨率的大小。

好吧，上一次的小练习，正好让我碰到了一个类似的：

　　所以这次就修改下使用：

　　　　

# -*- coding: utf-8 -*-
 
import os,sys,Image
 
rootDir = r‘c:\images‘
targetDir = r‘c:\imagesover‘
 
def encodeChinese(msg):
    type = sys.getfilesystemencoding()
    return msg.decode(‘UTF-8‘).encode(type)
 
errFile = open(r‘c:\errFile.txt‘,‘w‘)
 
def judgeSize(im):
    #判断图片分辨率,如果最大边超过1024返回False,如果不超过返回True
        mySize = im.size
    maxValue = max(mySize)
        minValue = min(mySize)
    if(maxValue > 1136):
        return True
    else:
        return False
 
def returnSize(im):
    #返回图片大小,返回两个值,第一个返回值总为最大
    max,min = im.size
    if max > min:
        return max,min
    else:
        return min,max
 
def changeSize(im,max,min):
    value = max/1136
    min = min/value
    newimg = im.resize((1136,640),Image.ANTIALIAS)
    return newimg
 
def main():
    for parent,dirnames,filenames in os.walk(rootDir):
        for filename in filenames:
            fName = filename
            filename = parent + os.sep + filename
            fPostfix = os.path.splitext(filename)[1]
            try:
                img = Image.open(filename)
            except:
                print filename
                print encodeChinese(‘打开这个文件出错‘)
                continue
            #img.load()
            print filename
            print fPostfix
            if(fPostfix !=‘.jpg‘ and fPostfix !=‘.png‘ and fPostfix != ‘.JPG‘ and fPostfix != ‘.PNG‘):
                errFile.write(str(filename) + ‘\n‘)
                errFile.write(encodeChinese(‘上面这个文件不是图片,请检查...‘) + ‘\n‘)
                errFile.write(‘\n‘)
            else:
                print ‘juageSize()‘
                if(judgeSize(img) == False):
                    print ‘judgeSize == False‘
                    max,min = returnSize(img)
                    newimg = changeSize(img,max,min)
                    newimg.save(targetDir + os.sep + fName)
                    print str(targetDir + os.sep + fName) 
                    print encodeChinese(‘保存完毕‘)
    print encodeChinese(‘处理完毕‘)
    errFile.close()
 
main()