Assistance on a Python program: Your program should contain the following functi

Question

Assistance on a Python program:

Your program should contain the following functions:

• read_names: Takes no parameters. Prompts the user for names until the user enters a blank line. Returns a list of the names the user entered (not including the blank line). Each line of user input should count as a single name, even if it has multiple words.

For example: Enter a name: Ilana Wexler

Enter a name: Abbi Abrams

Enter a name:

should return the list [ 'Ilana Wexler', 'Abbi Abrams']

is_sorted: Takes a list of strings as a parameter. Should return True if the list is in alphabetical order (A-Z) and False otherwise. Remember that, if strings s1 and s2 are the same case (upper or lower), s1 < s2 will be True if s1 comes first alphabetically. Don’t try to pull out the last names – just sort the strings as the user typed them

average length: Takes a list of strings as a parameter, and returns the average length (in characters) of the strings in the list. Spaces count as characters

main: Calling your other functions whenever possible, this function should get a list of names from the user (stopping when the user enters a blank line). It should then print the following:

– The string that comes last alphabetically (only if the list is sorted)

– All of the strings whose lengths are greater than the average length

Explanation / Answer

def read_names(): # input string function
   list = []
   while True:
       entered = raw_input("Enter string or leave a blank line to quit: ")
       if entered == " ":
           break
       if len(entered) == 0:
           break
       list.append(entered)
   print list
   return list

def is_sorted(list): # function to check if list is sorted
   if sorted(list) == list:
       return True
   else:
       print False

def average_length(list): # function to find average length of list
   all_lengths = []
   num_of_strings = len(list)
   for item in list:
       string_size = len(item)
       all_lengths.append(string_size)
       total_size = sum(all_lengths)
   ave_size = float(total_size) / float(num_of_strings)
   return ave_size

def main():
   list = read_names() # input list
   if is_sorted(list) == True: # checking if list is sorted
       print "List is sorted, last string is: "
       print list[-1]
   else:
       print "List is not sorted"
   avg = average_length(list) # find average length
   print "average length: "
   print avg
   print "strings having size greater than average size are: "
   for item in list:
       string_size = len(item)
       if string_size > avg:
           print item # print string whose size is greater than average

main()

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