text = "I love to work and pay my taxes!"
 
# text to list
words = text.split()
print words  # ['I', 'love', 'to', 'work', 'and', 'pay', 'my', 'taxes!']
 
# list to text
print ' '.join(words)  # I love to work and pay my taxes!

 # wordcensor.py
#     Program replaces 4 letter words in a text file.
 
import string
 
def main():
    print "This program replaces 4 lettter words in a file with xxxx"
 
    # get the sequence of words from the file
    fname = raw_input("File to analyze: ")
    text = open(fname,'r').read()
    text = string.lower(text)
    for ch in '!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~':
        text = string.replace(text, ch, ' ')
    words = string.split(text)
    wordCount = len(words)
    ch = string.split(words)
    charCount = len(ch)
    if charCount == 4:
             oldword = string.join(ch)
             newtext = string.join(text)
             o = open(fname,a)
             for line in open(fname):
                    line = line.replace(oldword,newword)
                    o.write(line + "\n") 
             o.close()
 
 
 
    text.close()     
 
main()