import numpy
from numpy import matrix
from numpy import linalg

import itertools
from pprint import pprint
import random


m = matrix( [
    ['Robot','Cyborg','Andoid', 'Bot', 'Droid'],
    ['Character','Concept','Mechanical Person', 'Artificial Intelligence', 'Mascot'],
    ['Downloadable','Stock','3d', 'Digital', 'Robotics'],
    ['Clipart','Illustration','Render', 'Image', 'Graphic'],
])

used = []

i = 0

def make_sentence(m, used):
    sentence = []
    i = 0
    while i <= 3:
        word = m[i,random.randrange(0,4)]
        sentence.append(word)
        i = i+1
    return ' '.join(sentence)

def is_used(sentence, used):
    if sentence not in used:
        return False
    else:
        return True

sentences = []
i = 0
while i <= 1000:
    sentence = make_sentence(m, used)
    if(is_used(sentence, used)):
        continue
    else:
        sentences.append(sentence)
        print str(i) + ' ' +sentence
        used.append(sentence)
        i = i+1

import itertools
 mx = [
  ['Robot','Cyborg','Andoid', 'Bot', 'Droid'],
  ['Character','Concept','Mechanical Person', 'Artificial Intelligence', 'Mascot'],
  ['Downloadable','Stock','3d', 'Digital', 'Robotics'],
  ['Clipart','Illustration','Render', 'Image', 'Graphic'],
  ]
for combination in itertools.product(*mx):
     print combination

def make_sentences(m, choices = []):
    output = []
    if len(choices) == 4:
         sentence = ""
         i = 0
         #Go through the four rows of the matrix
         #and choose words for the sentence
         for j in choices:
             sentence += " " + m[i][j]
             i += 1
    return [sentence] #must be returned as a list
    for i in range(0,4):
         output += make_sentences(m, choices+[i])
    return output #this could be changed to a yield statement