In
this assignment, you enhance your code from Week 6.
Please
follow the steps outlined below.
Preparation
- Copy
the data files from the Week 6 assignment.
- Copy
test_autompg.py
from the Week 6 assignment and rename it test_autompg2.py.
- Copy
autompg.py
from the Week 6 assignment and rename it autompg2.py.
-
Adjust
test_autompg2.py
so that it tests the code in autompg2.py,
and verify that it executes successfully.
Step
1: Configure logging module
In
autompg2.py
configure the logging
module as shown in the lecture so that it logs at the DEBUG level
into file autompg2.log
and to the console at level INFO. Go back through the code in
autompg2.py
and add logging calls at appropriate places. As new code is written
in this assignment, add logging calls as you go.
Step
2: Add sorting to AutoMPGData class
Enhance
the AutoMPGData class by adding the following methods:
-
sort_by_default
– This method should use the list.sort
method to sort the data list in place. By default, list.sort
will use the sorting implied by the less-than operator already
implemented on the AutoMPG class. After this method is run, the list
will be sorted by
make, model, year,
and then mpg.
-
sort_by_year
– This method will use list.sort
to sort the list in place but will override the default sorting by
specifying the key=
keyword parameter to list.sort
to ensure that sorting happens by year,
make, model, mpg.
-
sort_by_mpg
– This method will use list.sort
to sort the list in place but will override the default sorting so
that the order is determined by mpg,
make, model, year.
Step
3: Add capability to download Internet data
Enhance
the AutoMPGData class by adding the _get_data
method. Please follow these guidelines for this method:
-
_get_data
will be called by the _load_data
method if the original data file (auto-mpg.data.txt)
does not exist.
-
This
method should use the requests
module to download the
original
data file
from
the UCI Machine Learning Repository and save it in the local file
auto-mpg.data.txt.
Test
this functionality by removing the local data file and executing
autompg2.py.
It should download the data and then work as before.
Step
4: Enhance command-line parsing
In
autompg2.py
use the argparse
module to implement enhanced command-line parsing for this program.
The program should support the usage shown below. The only “command”
supported is “print”, which will iterate over the elements of the
AutoMPGData
collection (as it is sorted) and print each one. The options to the
“sort order” are “year”, “mpg”, and “default”, and
the result of these options is to call the corresponding
“sort_by_XXX” method on the
AutoMPGData
object before the data are printed.
usage:
autompg2.py [-h] [-s <sort order>] <command>
analyze
Auto MPG data set
positional
arguments:
<command>
command
to execute
optional
arguments:
-h,
--help show
this help message and exit
-s
<sort order>, --sort <sort order>
Upload
Please
put autompg2.py
into a ZIP file.
