image processing

convert_image.py

import os
from os import listdir
from os.path import isfile, join
from invoke import run, task

dirpath = './mypath'

@task
def resize():
    #http://www.imagemagick.org/Usage/resize/#resize
    for filename in listdir(dirpath):
        if isfile(join(dirpath, filename)):
            prefix, extension = os.path.splitext(filename)
            if extension in ('.jpg', '.jpeg', '.png', '.gif'):
                run('convert {} -resize 200x200 {}_200x200{}'.format(os.path.join(dirpath, filename), os.path.join(dirpath, prefix), extension))

resize()