Just a plain simple boring xkcd comic downloader with download progress indicator.

LICENSE

DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE 
                    Version 2, December 2004 

 Copyright (C) 2016 Sayan Goswami <goswami.sayan47@gmail.com> 

 Everyone is permitted to copy and distribute verbatim or modified 
 copies of this license document, and changing it is allowed as long 
 as the name is changed. 

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE 
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 

  0. You just DO WHAT THE FUCK YOU WANT TO.

xkcd_downloader.py

"""
	Use this Python 3 script to download all the comics from xkcd.com website.
	Brought to you by Sayan (c) 2016
	https://linkedin.com/in/sayan-goswami
"""

import requests
# import re 
from bs4 import BeautifulSoup
import wget

def get_image_url(num):
	"""Returns image URL from a number."""
	url = 'http://www.xkcd.com/' + str(num)
	r = requests.get(url)
	data = r.text
	if '404' in data:
		print('Page not found for',num+'.')
		exit()
	soup = BeautifulSoup(data)
	d = str(soup.find_all('div',{'id':'comic'})[0])
	arr = d.split()
	s = ''
	for string in arr:
		if 'src' in string:
			s = string
			s = s[7:-1]
	return s

def download_image(img_url):
	"""Downloads image using wget."""
	arr = img_url.split('/')
	wget.download('http://'+img_url,arr[-1])
	print('\n\nDownloaded image for',arr[-1])

if __name__ == '__main__':
	num = 1
	while(True):
		try:
			download_image(get_image_url(num))
		except Exception:
			pass
		num += 1

requirements.txt

beautifulsoup4==4.5.1
requests==2.11.1
wget==3.2

scrape.py

"""
    Use this Python 3 script to download all the comics 
    from xkcd.com website.
    Brought to you by Sayan (c) 2016
    https://twitter.com/codersayan
"""
import requests
from bs4 import BeautifulSoup
import wget

def get_image_url(num):
    """Returns image URL from a number."""
    url = 'http://www.xkcd.com/' + str(num)
    r = requests.get(url)
    data = r.text
    if '404' in data:
        print('Page not found for',num+'.')
        exit()
    soup = BeautifulSoup(data)
    d = str(soup.find_all('div',{'id':'comic'})[0])
    arr = d.split()
    s = ''
    for string in arr:
        if 'src' in string:
            s = string
            s = s[7:-1]
    return s

def download_image(img_url, num):
    """Downloads image using wget."""
    arr = img_url.split('/')
    filename = '{}_{}'.format(
        str(num).zfill(6),
        arr[-1].replace('(1)', '').replace('_.','.'))
    wget.download('http://'+img_url, filename)
    print('\n\nDownloaded image for', filename)

if __name__ == '__main__':
    num = 1
    while(True):
        try:
            download_image(get_image_url(num), num)
        except Exception:
            pass
        num += 1

Also found
http://xkcd.com/info.0.json
http://xkcd.com/1/info.0.json

json API FTW

The JSON API would've saved a lot of work. Thanks a ton!
Apologies for being so late.