Scraping images from Tumblr via Tumblr API (pytumblr). //Please consult website TOS/robots.txt prior to use.

scrapeTumblr.py

import pytumblr
import io

def get_all_posts(client, blog):
    offset = 0
    while True:
        # Note: similar for ``client.tagged()`` etc.
        response = client.posts(blog, limit=20, offset=offset, reblog_info=True, notes_info=True)
        posts = response['posts']
        if not posts: return
        for post in posts:
            if('photos' not in post):
                if('body' in post):
                    body = post['body']
                    body = body.split('<')
                    body = [b for b in body if 'img src=' in b]
                    if(body):
                        body = body[0].split('"')
                        print(body[1])
                        yield body[1]
                    else:
                        yield
            else:
                yield post['photos'][0]['original_size']['url']

        offset += 20


client = pytumblr.TumblrRestClient('OAuth consumer key:')
blog = 'blogname/prefix'

with io.open('{}-posts.txt'.format(blog), 'w', encoding="utf-8") as out_file:
    for post in get_all_posts(client, blog):
        print(post, file=out_file)