I'm lost, my blood drive program isn't working correctly.

#Lab 10-3 Blood Drive

#the main function
def main():
  endProgram = 'no'
  while endProgram == 'no':
    option = 0
    print ('Enter 1 to enter in new data and store to file')
    print ('Enter 2 to display data from the file')
    option = int(input('Enter now ->'))

    # declare variables
    pints = [0] * 7
    totalPints = 0
    averagePints = 0

    if option == 1:
      # function calls
      pints = getPints(pints)
      totalPints = getTotal(pints, totalPints)
      averagePints = getAverage(totalPints, averagePints)
      writeToFile(averagePints, pints)

    else:
      readFromFile(averagePints, pints)

    endProgram = input('Do you want to end program? (Enter no or yes): ')
    while not (endProgram == 'yes' or endProgram == 'no'):
      print ('Please enter a yes or no')
      endProgram = input('Do you want to end program? (Enter no or yes): ')

#the getPints function
def getPints(pints):
  counter = 0
  while counter < 7:
      pints[counter] = input('Enter pints collected: ')
      counter = counter + 1
  return pints

#the getTotal function
def getTotal(pints, totalPints):
  counter = 0
  while counter < 7:
    totalPints = totalPints + pints[counter]
    counter = counter + 1

  return totalPints

#the getAverage function
def getAverage(totalPints, averagePints):
  averagePints = int(float(totalPints) / 7)

  return averagePints

#the writeToFile function
def writeToFile(averagePints, pints):
   outFile = open('blood.txt', 'a')
   print >> outFile, int('Pints Each Hour')
   counter = 0
   while counter <= 7:
          outFile.write(str(pints[counter]) + '\n')
          counter = int(counter + 1)
          outFile.write('Average Pints')
          outFile.write(str(averagePints) + '\n\n')
          outFile.close()

#the readFromFile function
def readFromFile(averagePints, pints):
           inFile = open('blood.txt', 'r')
           str1 = inFile.read()
           print (str1)
           pints = inFile.read()
           print (pints)
           print #adds a blank line
           averagePints = inFile.read()
           print (averagePints)
           inFile.close()

# calls main
main()