Question

This program should use a main function and two other functions named playlist and savelist as follows: The main function: The main function should create an empty list named nums and then use a loop to add ten integers to nums, each integer in the range from 10-90. NOTE: In Python, a list is a data type. See Chapter 7. The main function should then call the playlist function and savelist function, in that order. Both of these functions take the nums list as a sole argument. The playlist function: playlist should use a loop to display the elements of the list, all on one line separated by a single space. playlist should also determine and print the total of the even numbers and the total of the odd numbers. The savelist function: save list should sort the list and write each element to a text file named angles.txt, each element on its own line.

SAMPLE OUTPUT

Here are the integers in nums:

23 85 31 55 42 85 72 33 39 20

Even integers total to 134

Odd integers total to 351

List of integers was written to file.

End of program.

Answer 1

Here is the code for you:

#!/usr/bin/python

def playlist(nums):
   # playlist should use a loop to display the elements of the list, all on one line
   # separated by a single space
   for num in nums:
       print num,
   print
   # playlist should also determine and print the total of the even numbers and the total
   # of the odd numbers.
   evens = 0
   odds = 0
   for num in nums:
       if num % 2 == 0:
           evens += num
       else:
           odds += num
   print 'Even integers total to ', evens
   print 'Odd integers total to ', odds
  
def savelist(nums):
   # save list should sort the list and write each element to a text file named angles.txt,
   # each element on its own line.             
   nums.sort()
   outfile = open('angles.txt', 'w')
   for num in nums:
       outfile.write(str(num) + '\n')
   print 'List of integers was written to file.'  
      
def main():
   # The main function should create an empty list named nums and then use a loop to add
   # ten integers to nums, each integer in the range from 10-90.
   nums = []
   for i in range(10):
       print 'Enter integer #', (i+1), ' (in range 10 - 90): ',
       val = input()
       nums.append(val)
   # The main function should then call the playlist function and savelist function, in that order.  
   playlist(nums)
   savelist(nums)
main()  

And the output screenshot is: