Chapter 6 You finally can make a program that uses raw_input. Note NOT input, in

Question

Chapter 6
You finally can make a program that uses raw_input. Note NOT input, input is to get python commands to process, whereas raw_input is to get strings.
1. Write a program that prompts the user to type in a sentence. Then get that sentence and split what they typed into a word array. Then using a for loop, print out the words one per line.
2. Using formatted output, read in a file of numbers, then print out the numbers - 3 per line as numbers that are in neat columns by using a formatting string to make the numbers 8 characters wide with 2 decimal places.
3. Using the same program as above, make the output go to a file called output.txt

Explanation / Answer

1.string = raw_input('Please enter a sentence: ')
   array = string.split(" ");
   for s in array:
       print s

2. textfile = open("Numbers.txt")
   nums = textfile.read().split(' ')
   for i in range(len(nums)):
       print "%7.2f" % float(nums[i]), #the comma is so that it doesn't go to the next line
    if i%3==2:
        print ' ' #this will go to the next line every three numbers

3. textfile = open("Numbers.txt")
   outputfile = open("Output.txt", 'r+')
   nums = textfile.read().split(' ')
   for i in range(len(nums)):
       outputfile.write("%7.2f" % float(nums[i]))
       if i%3==2:
           outputfile.write(" ")

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