exercise8_4.py

#!/usr/bin/env python3
"""
Exercise  8.4: Download a copy of the file from www.py4e.com/code3/romeo.txt

Write a program to open the file romeo.txt and read it line by line. For each
line, split the line into a list of words using the split function.

For each word, check to see if the word is already in a list. If the word is
not in the list, add it to the list.

When the program completes, sort and print the resulting words in alphabetical
order.

['Arise', 'But', 'It', 'Juliet', 'Who', 'already', 'and', 'breaks', 'east',
'envious', 'fair', 'grief', 'is', 'kill', 'light', 'moon', 'pale', 'sick',
'soft', 'sun', 'the', 'through', 'what', 'window', 'with', 'yonder']

Python for Everybody: Exploring Data Using Python 3
by Charles R. Severance
"""

my_list = []
fhand = open('romeo.txt')
for line in fhand:
    words = line.split()                # Splits line into array of words
    for word in words:
        if word in my_list:
            continue                    # Discards duplicates
        my_list.append(word)            # Updates the list
print(sorted(my_list))                  # Alphabetical order