Lecture Notes on 22 Jul 2013

# reverses the lines in a file
def reverse_file (fileA, fileB):
  lines = []
  inFile = open (fileA, 'r')
  for line in inFile:
    lines.append (line)
  inFile.close()

  lines.reverse()

  outFile = open (fileB, 'w')
  for line in lines:
    outFile.write (line)
  outFile.close()

# makes a copy of a file
def copy_file (fileA, fileB):
  inFile = open (fileA, 'r')
  outFile = open (fileB, 'w')
  fileContent = inFile.read()
  inFile.close()
  outFile.write (fileContent)
  outFile.close()

def main():
  
  # prints the indices of all the s's
  s = 'sleeplessness'
  limit = len (s)
  for i in range (limit):
    if (s[i] == 's'):
      print (i, end = '  ')
  print ()

  # prints all the substrings of s
  s = 'abcd'
  window = len (s)
  while (window > 0):
    i = 0
    while (i + window <= len(s)):
      print (s[i: i + window])
      i = i + 1
    window = window - 1

  copy_file ('rhyme.txt', 'copy_of_rhyme')

  reverse_file ('rhyme.txt', 'reverse_of_rhyme')

main()