docs: def directory_cloud(self,directory,max_text_size=72,min_text_size=12,expand_width=50,expand_height=50,max_count=100000):
          '''Creates a word cloud using files from a directory.
          The color of the words correspond to the amount of documents the word occurs in.'''
          worddict = assign_fonts(tuplecount(read_dir(directory)),max_text_size,min_text_size,self.exclude_words)
          sorted_worddict = list(reversed(sorted(worddict.keys(), key=lambda x: worddict[x])))
          colordict = assign_colors(dir_freq(directory))
          num_words = 0
          for word in sorted_worddict:
              self.render_word(word,worddict[word],colordict[word])
              if self.width < self.word_size[0]:
                  #If the word is bigger than the surface, expand the surface.
                  self.expand(self.word_size[0]-self.width,0)
              elif self.height < self.word_size[1]:
                  self.expand(0,self.word_size[1]-self.height)
              position = [randint(0,self.width-self.word_size[0]),randint(0,self.height-self.word_size[1])]
              #the initial position is determined
              loopcount = 0
              while self.collides(position,self.word_size):
                  if loopcount > max_count:
                  #If it can't find a position for the word, create a bigger cloud.
                      self.expand(expand_width,expand_height)      
                      loopcount = 0
                  position = [randint(0,self.width-self.word_size[0]),randint(0,self.height-self.word_size[1])]
                  loopcount += 1
              self.plot_word(position)
              num_words += 1