add script to download all xkcd comics

Author: prakharchoudhary

automation/xkcddownloader.py

@@ -0,0 +1,45 @@
+"""
+Download all the comics from xkcd comics
+"""
+
+#!/usr/bin/python3
+# xkcddownloader.py - Downloads every single XKCD comic.
+
+import requests, os, bs4
+
+url = 'http://xkcd.com'
+os.makedirs('xkcd', exist_ok=True) #creates a new dir 'xkcd'
+								   # if it doesnot exist
+
+while not url.endswith('#'):
+	#TODO: Download the page
+	print('Downloading page %s....' % url)
+	res = requests.get(url)
+	res.raise_for_status()
+
+	soup = bs4.BeautifulSoup(res.text)
+	#TODO: Find url to next page
+
+	comicElem = soup.select('#comic img')
+	if comicElem == []:
+		print("Could not find comic image.")
+	else:
+		comicUrl = 'http:' + comicElem[0].get('src')
+		#TODO : Download the image
+		print('Downloading page %s....' % comicUrl)
+		res = requests.get(comicUrl)
+		res.raise_for_status()
+
+
+	#TODO: Save the image to ./xkcd
+	imageFile = open(os.path.join('xkcd', os.path.basename(comicUrl)), 'wb')
+	for chunk in res.iter_content(100000):
+		imageFile.write(chunk)
+	imageFile.close()
+
+	#TODO: Get the Prev button's url
+	prevLink = soup.select('a[rel=prev]')[0]
+	url = 'http://xkcd.com' + prevLink.get('href')
+
+print('Done.')
+