批量压缩png图片工具

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import os
import sys
## 参考https://www.jianshu.com/p/bfa29141437e
# 执行文件路径:
    # os.path.realpath(__file__)
    # sys.argv[0]
# 当前图片目录:os.getcwd()
# 文件目录:sys.path[0]

# 获取终端参数
#   sys.argv[1]
# 用法
# pngTo imgDir 默认目录路径

def GetFileFromThisRootDir(dir, ext = None):
    allfiles = []
    needExtFilter = (ext != None)
    for root,dirs,files in os.walk(dir):
        for filespath in files:
            filepath = os.path.join(root, filespath)
            extension = os.path.splitext(filepath)[1][1:]
            if needExtFilter and extension == ext in ext:
                allfiles.append(filepath)
    return allfiles

if __name__ == '__main__':
    rootDir=sys.path[0]
    PngquantExe = rootDir + "/pngquant"
    print(len(sys.argv))
    if len(sys.argv) == 1:  #当没有传目录参数时,默认获取当前目录
        srcDir = os.getcwd()
    else:
        srcDir=sys.argv[1]  #获取用户指定的目录路径
    print(srcDir)
    imgFiles=GetFileFromThisRootDir(srcDir, 'png')
    suffix="_temp.png"
    for f in imgFiles:
        cmd = "\"" + PngquantExe + "\"" + " --ext " + suffix + " --force --speed=3 "+ f
        os.system(cmd)
        os.remove(f)
        newfile=f.replace(".png", suffix)
        os.rename(newfile, f)
print("压缩完成")