#gets 200 random imgur images and saves them to the folder images/
#note that all of them will be saved with the extension .jpg, regardless of the actual format

import urllib
import random
import os

def getimgstr(number):
    alphabet = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'
    res = ''
    while number:
        number, i = divmod(number, 62)
        res = alphabet[i] + res
    while len(res) < 5:
        res = '0' + res
    return res

i = 0
while i < 200:
    st = getimgstr(random.randint(0, 916132831)) #62 ^ 5 - 1
    print st
    urllib.urlretrieve("http://i.imgur.com/" + st + ".jpg", "images/" + st + ".jpg")
    sz = os.stat("images/" + st + ".jpg").st_size
    if sz < 1024: #reject invalid images
        os.remove("images/" + st + ".jpg")
        print " - invalid"
    else:
        i += 1
        print " - valid - " + str(sz) + " bytes"