#!/bin/python

from BeautifulSoup import BeautifulSoup
from os.path import basename, splitext
from PIL import Image
import glob

# Path where the posts are, in markdown format
path = "/ruta/ficheros/*.md"

# Iterate over all posts
for fname in glob.glob(path):
    # Open the post
    f = open(fname)
    # Create a BeautifulSoup object to parse the file
    soup = BeautifulSoup(f)
    f.close()
    # For each img tag:
    for img in soup.findAll('img'):
        if img != None:
            try:
                if img['src'].startswith("/assets") == True:
                    # Open the image
                    pil = Image.open("/ruta/carpeta/imagenes" + img['src'])
                    # Get its size
                    width, height = pil.size
                    # Modify img tag with image size
                    img['width'] = str(width) + "px"
                    img['height'] = str(height) + "px"
            except KeyError:
                pass
    # Save the updated post
    with open(fname, "wb") as file:
        file.write(str(soup))