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Write a program that will announce the appearance of something "off the larboard bow" to the captain of the ship. Note that you need to "a" before a word starting with a consonant:
$ ./crowsnest.py narwhal Ahoy, Captain, a narwhal off the larboard bow! Or "an" before a word starting with a vowel:
$ ./crowsnest.py octopus Ahoy, Captain, an octopus off the larboard bow! Given no arguments, the program should print a brief usage:
$ ./crowsnest.py usage: crowsnest.py [-h] str crowsnest.py: error: the following arguments are required: str It should print a longer usage for -h and --help:
$ ./crowsnest.py -h usage: crowsnest.py [-h] str Crow's Nest -- choose the correct article positional arguments: str A word optional arguments: -h, --help show this help message and exit A passing test suite looks like this:
$ make test pytest -xv test.py ============================= test session starts ============================== ... collected 6 items test.py::test_exists PASSED [ 16%] test.py::test_usage PASSED [ 33%] test.py::test_consonant PASSED [ 50%] test.py::test_consonant_upper PASSED [ 66%] test.py::test_vowel PASSED [ 83%] test.py::test_vowel_upper PASSED [100%] ============================== 6 passed in 2.89s ===============================