https://www.youtube.com/playlist?list=PLhOuww6rJJNNd1Mbu3h6SGfhD-8rRxLTp
Write a program that will encode any number in a given string using an algorightm to "jump the five" on a standard US telephone keypad such that "1" becomes "9," "4" becomes "6," etc. The "5" and the "0" will swap with each other. Here is the entire substitution table:
1 => 9
2 => 8
3 => 7
4 => 6
5 => 0
6 => 4
7 => 3
8 => 2
9 => 1
0 => 5
Encode only the numbers and leave all other text alone:
$ ./jump.py 867-5309
243-0751
If given no arguments, present a brief usage:
$ ./jump.py
usage: jump.py [-h] str
jump.py: error: the following arguments are required: str
Respond to -h or --help with a longer usage:
$ ./jump.py -h
usage: jump.py [-h] str
Jump the Five
positional arguments:
str Input text
optional arguments:
-h, --help show this help message and exit
Run the test suite to ensure your program is working correctly:
$ make test
pytest -xv test.py
============================= test session starts ==============================
...
collected 4 items
test.py::test_exists PASSED [ 25%]
test.py::test_usage PASSED [ 50%]
test.py::test_01 PASSED [ 75%]
test.py::test_02 PASSED [100%]
============================== 4 passed in 0.53s ===============================