8-3

#! /usr/bin/env python3.2
# -*- coding: utf-8 -*-

# main.py
""" Task: Exercise 8.3
    Rewrite the guardian code in the above example without two if statements.
    Instead use a compound logical expression using the and logical operator
    with a single if statement.
"""

# test.txt is equal to mbox.txt, but added following 3 lines somewhere:
"""
>>> The next line fails with the original code:
From xyz
>>> because of there are more than one, but less than two words...
"""

''' Main '''
try:
    fhand = open('test.txt')
except:
    print("File not found!")
    exit()
week = ["Sat", "Sun", "Mon", "Tue", "Wed", "Thu", "Fri"]
count = 0
for line in fhand:
    words = line.split()
    # print('Debug:', words)
    if len(words) >= 3 and words[0] == 'From' and words[2] in week[:]:
        try:                # Additional guard
            print(words[2])
            count += 1      # counts the interesting lines
        except IndexError:
            continue
print("There are " + str(count) + " interesting lines.")
try:
    fhand.close()
except:
    exit()