MORE ON FOR STATEMENT

words = ['hello', 'world', 'from', 'python']
for w in words: print w

- a real world sample: (create list of words used in a book chapter titles)

#'titles' contains a list of chapter titles (strings)

wordDB = {}                   #create an empty dictionary
for title in titles:          #iterate over the list of titles
  words = string.split(title) #get list of words
  for word in words:          #put a word into the dictionary
    wordDB[string.upper(word)] = 1
print wordDB.keys()           #print the list of words