What$$s the Big Idea?

Build on your previous Analyzing Firewall Logs project $($v$\mathrm{.}1-2)$ to add additional functionality.

New Data File

$$ You have been provided with a new CSV that contains a full year of log entry data

$$ BEFORE you continue with this project, download the new CSV into the root directory for your project and execute your Python command.

o Use the following command to execute your program:

$$ python index.py $--$filename firewall$\_$logs$\_2022.$csv

o Your program should work precisely as it did before $($and output only $5$ rows of data$)$

Review the New CSV Data

The CSV file provided to you includes simulated data from a firewall program.

Review the structure of the data and familiarize yourself with the fields that are included. $$ You may want to install the Rainbow CSV extension to VS Code to make the CSV easier to read.

$$ Alternatively, you may make a copy of the CSV somewhere NOT in your local root folder and open it with Excel for review. $($Don$$t try to save the file from Excel $$ it can corrupt the CSV and make it unreadable by Python.$)$

Refactor Your Existing Program

You will update your program to take TWO required command line arguments:

$1.--$filename $($or $-$f$)$

$2.--$action $($or $-$a$)$

In your main$()$ method, check the value of the $--$action argument. If the value is $$head$,$ run your previous code that writes the first $5$ objects from the CSV file to the screen. $($Your program should run exactly as it did before.$)$

The new command to run your program is:

python index.py $--$filename firewall$\_$logs$\_2022.$csv $--$action head

Refactoring Suggestion!

Create a new method named print$\_$head$()$ and move your code that writes the first $5$ objects to the screen into this new method. Call print$\_$head$()$ if the value of the $--$action argument is $$head$.$

Commit and Branch!

Once your program behaves as described, do the following:

$1.$ Add and commit your files using Git $2.$ Remember to add the standard Python $.$gitignore file to your directory if you have not already!

$3.$ Create a new branch $($named v$3)$ that preserves your work at this point in the program

$4.$ Switch back to the main branch

$5.($Optional$)$ Push all your branches to GitHub.com with the command git push origin $$all

Complete instructions can be found in the CIT $30900$ workbook.

Additional Action: Deny

New Method

Create a method called deny$\_$count$().$

In this method, use a list comprehension to filter ONLY the log entries whose action is $$Deny$$ into a new list.

Print the number of log entries that were denied to the screen.

Implement the New Method

Update your program to allow the user to provide the value $$deny$$ to the $--$action argument.

If the user chooses this action, call the deny$\_$count$()$ method.

View the Result

The command

python index.py $--$filename firewall$\_$logs$\_2022.$csv $--$action deny

Should result in a print$()$ statement that says the following $($the number will be different based on the data$)$:

$12,345$ log entries were denied.

Additional Action: Count of Country

New Method

Create a method called country$\_$count$().$ It must accept an argument that contains a $2-$letter country code.

In this method, use a list comprehension to filter ONLY the log entries whose country matches the country code value of the argument.

Print the number of log entries that match this country code to the screen.

New Argument

To implement this action, you will need to accept a new NON$-$REQUIRED command line argument $--$country, or $-$c

Implement the New Method

Update your program to allow the user to provide the value $$source$$ to the $--$action argument.

If the user chooses this action, call the country$\_$count$()$ method and pass the value of the $--$country argument.

View the Result

The command

python index.py $--$filename firewall$\_$logs$\_2022.$csv $--$action source $--$country US

Should result in a print$()$ statement that says the following $($the number will be different based on the data$)$:

$12,345$ log entries from the US were recorded.