LockDown Project

1. Clone the repository and enter it:

   $ git@github.com:impact-oriented-programming/ebay.git
   ...
   $ cd ebay/

2. Run the installation script and activate the virtual environment:

   $ ./scripts/install.sh
   ...
   $ source .env/bin/activate
   [ebay] $ # you're good to go!

3. To check that everything is working as expected, run the tests:

   $ pytest tests/
   ...

The foobar packages provides the following classes:

• Foo

  This class encapsulates the concept of foo, and returns "foo" when run.

  In addition, it provides the inc method to increment integers, and the add method to sum them.

  >>> from foobar import Foo
  >>> foo = Foo()
  >>> foo.run()
  'foo'
  >>> foo.inc(1)
  2
  >>> foo.add(1, 2)
  3

• Bar

  This class encapsulates the concept of bar; it's very similar to Foo, except it returns "bar" when run.

  >>> from foobar import Bar
  >>> bar = Bar()
  >>> bar.run()
  'bar'

The foobar package also provides a command-line interface:

$ python -m foobar
foobar, version 0.1.0

All commands accept the -q or --quiet flag to suppress output, and the -t or --traceback flag to show the full traceback when an exception is raised (by default, only the error message is printed, and the program exits with a non-zero code).

The CLI provides the foo command, with the run, add and inc subcommands:

$ python -m foobar foo run
foo
$ python -m foobar foo inc 1
2
$ python -m foobar foo add 1 2
3

The CLI further provides the bar command, with the run and error subcommands.

Curiously enough, bar's run subcommand accepts the -o or --output option to write its output to a file rather than the standard output, and the -u or --uppercase option to do so in uppercase letters.

$ python -m foobar bar run
bar
$ python -m foobar bar run -u
BAR
$ python -m foobar bar run -o output.txt
$ cat output.txt
BAR

Do note that each command's options should be passed to that command, so for example the -q and -t options should be passed to foobar, not foo or bar.

$ python -m foobar bar run -q # this doesn't work
ERROR: no such option: -q
$ python -m foobar -q bar run # this does work

To showcase these options, consider bar's error subcommand, which raises an exception:

$ python -m foobar bar error
ERROR: something went terribly wrong :[
$ python -m foobar -q bar error # suppress output
$ python -m foobar -t bar error # show full traceback
ERROR: something went terribly wrong :[
Traceback (most recent call last):
    ...
RuntimeError: something went terrible wrong :[