www.hackthissite.org programming missions

hackthissite_programming_mission_1.py

if __name__ == '__main__':
    #get wordlist
    f = open('wordlist.txt','r')
    wordlist = [line.strip()for line in f]
    f.close()
    #get given words
    f = open('words.txt')
    words = [line[1:].strip()for line in f]
    f.close()
    #result will be stored in this list
    result = []
    
    #loop over given words
    for word in words:
        #put characters of word into a list and sort them
        lword = [c for c in word]
        lword.sort()
        
        #loop over candidatelist
        for candidate in wordlist:
            lcandidate = [c for c in candidate]
            lcandidate.sort()
            #if list of characters in current word is equal to list of
            #characters in candidate add it to result and stop candidate loop
            if lword == lcandidate:
                result.append(candidate)
                break
    # for w in result:
    #     print w
    print ','.join(result)

hackthissite_programming_mission_2.py

from PIL import Image
#morse alphabet for conversation
letters = [('A',".-"),   ('B',"-..."), ('C',"-.-."), ('D',"-.."), ('E',"."),
           ('F',"..-."), ('G',"--."),  ('H',"...."), ('I',".."),  ('J',".---"),
           ('K',"-.-"),  ('L',".-.."), ('M',"--"),   ('N',"-."),  ('O',"---"),
           ('P',".--."), ('Q',"--.-"), ('R',".-."),  ('S',"..."), ('T',"-"),
           ('U',"..-"),  ('V',"...-"), ('W',".--"),  ('X',"-..-"),('Y',"-.--"),
           ('Z',"--.."), ('1',".----"), ('2',"..---"), ('3',"...--"), ('4',"....-"),
           ('5',"....."), ('6',"-...."), ('7',"--..."), ('8',"---.."), ('9',"----."),
           ('0',"-----")]

if __name__=='__main__':
    #image has to be in a.png file
    #read image
    f = open('a.png')
    im = Image.open(f)
    pixels = im.load()
    width,height = im.size
    #put pixels in an arrray
    all_pixel = []
    for y in range(height):
        for x in range(width):
            all_pixel.append(pixels[x,y])
    #convert pixels to characters
    last_index = 0
    result_morse = []
    for i,p in enumerate(all_pixel):
        if p == 1:
            result_morse.append(i-last_index)
            last_index = i
    #create result string from result list
    st = ''
    for i in result_morse:
        st = st+chr(i)
    #sepearte morse characters and create a mores character list
    morse_list = st.split(' ')
    #decode morse code
    result = ""
    for morse_letter in morse_list:
        for letter in letters:
            if morse_letter == letter[1]:
                result = result + letter[0]
                break
        else:
            #if we cant convert morse code, print the code
            if morse_letter:
                print "problem letter = %s"%morse_letter
    print result
    #copy result to clipboard
    import pygtk
    pygtk.require('2.0')
    import gtk
    # get the clipboard
    clipboard = gtk.clipboard_get()
    # set the clipboard text data
    clipboard.set_text(result)
    # make our data available to other applications
    clipboard.store()