gistfile1.py

# Download pictures of cats.
# 1) Ask the user for width of the cat.
# 2) Ask the user for the height of the cat.
# 3) Ask the user for the name of the cat image.
# 4) Download the cat image.
# 5) ONLY IF... the name of the cat image doesn't already
#    exist on disk.
# BONUS
# * Build a webpage with ALLLLLL of the images downloaded.

import os
import urllib2
width = raw_input("Gimme x pixels: ")
height = raw_input("Gimme y pixels: ")
cat_name = raw_input("Gimme cat name: ") + ".jpg"
url = "http://placekitten.com/%s/%s" % (width, height)
if os.path.exists(cat_name):
    print "I do not want to overwrite:", cat_name, "exiting."
else:
    catdata = urllib2.urlopen(url)
    f = open(cat_name, "wb")
    f.write(catdata.read())
    f.close()
    print "Made", cat_name, "for you."
    # EXTRA CREDIT below.....
    f = open("list_of_cats.txt", "a")
    f.write(cat_name + "\n")
    f.close()
    f = open("list_of_cats.txt", "r")
    list_of_cats = []
    for cat in f:
        cat_img = "<img src='%s'/>" % cat
        list_of_cats.append(cat_img)
    f.close()
    f = open("cats.html", "w")
    f.write("\n".join(list_of_cats))
    f.close()