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Python Programming

Create a symbolic link to your script as ccn.py so that you can refer to your script as ccn.py. Your script must accept one or more "web site" as its command line parameters and other optional parameters

INSTRUCTIONS TO CANDIDATES
ANSWER ALL QUESTIONS

Instruction
Program Name and valid command line arguments
Name your Python3 script as ccn_[student_id].py. Create a symbolic link to your script as ccn.py (e.g. use the command ln -s ccn_rchan.py ccn.py to create the link) so that you can refer to your script as ccn.py. Your script must accept one or more "web site" as its command line parameters and other optional parameters as shown below. Your python script should produce the following usage text when run with the --help option:
 usage: ccn.py [-h] [-s SITE] [-t {table,text}] [-n {table,text}] N [N ...]
 Class Cancellation Notification System
 positional arguments:
  N         list of notification subscription sites to be processed.
 
optional arguments:
  -h, --help  show this help message and exit
  -s SITE, --site SITE  class cancellation web site
  -t {table,text}, --type {table,text}
                        type of class concellation data: table -> html table,
                        text -> plain text file
  -n {table,text}, --notification {table,text}
                        type of notification data: table -> html table, text
                        -> plain text file
 
Copyright 2020 - Raymond Chan
Replace the last line with your own full name
 If there is one CCN subscription web page provided at the command line, read the subscription list from the given web page. If there are more than one CCN subscription web pages provided, merge all the subscription list with the first one at the top and the last one at the bottom. Read and process the subscription list in that order in your program.
 If no class cancellation site specified, default to https://scs.senecac.on.ca/~raymond.chan/ops435/a3/ccn.html.
 If no -t or -n specified, default to html table.
Header
All your Python code for this assignment must be placed in a single source file. Please include the following declaration by you as the script level docstring in your Python source code file (replace [Student_id] with your Seneca email user name, and "Student Name" with your own name): 
OPS435 Assignment 3 - Fall 2019
Program: ccn_[Stduent_id].py
Author: "Student Name"
The python code in this file ccn_[Student_id].py is original work written by
"Student Name". No code in this file is copied from any other source 
including any person, textbook, or on-line resource except those provided
by the course instructor. I have not shared this python file with anyone
or anything except for submission for grading.  
I understand that the Academic Honesty Policy will be enforced and violators 
will be reported and appropriate action will be taken.
Modules you are allowed to use in your script for this assignment
the os, sys modules
the argparse module
Argparse Tutorial - should read this first.
Argparse API reference information page
the time module
Time module Tutorial
Time module API reference page
If you want or need to use other Python modules, please consult your professor to get the permission.
Sample Output
You python script should check the class cancellation notification site for any classes cancellation that are going to happen in the next 24 hours. If it identifies any classes, it should check the class cancellation notification subscription sites for any matches. If there is any matches, it should send an appropriate email to all the subscribers using the following template:
 
Dear <subscriber full name>,
     Your <class code> scheduled on <data and time> is being cancellated. Details about the cancellation can be found and confirm at <Class Cancellation Notification site>.
 
Your class cancellation notification team.
Message generated on <Date and time stamp>
The sample message should also be written to your CCN log file named ccn.log.

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