Y Language fever has gripped the city! Hot on the heels of Triangle announcing their decision to switch to Y Language, ROS - Retro Operating Systems has announced the same thing!

(In this exercise, X = Javascript and Y = Python. So you'll be rewriting a program originally written in Javascript into Python!)

• Write Python version of the Contacts program in main.py
• Write Python version of the Contacts program in contacts.py
• Use basic Python syntax including:
  • List [] syntax
  • Dictionary {} syntax
  • Iterating through lists
  • Appending and Removing items from lists
  • while loops
  • match statement (same as switch in Javascript)
  • String interpolation using f-strings
  • And everything else from the previous problem!

• Fork and clone thishttps://git.generalassemb.ly/SEI-Standard-Curriculum/M4L3-python-containers-wbp repository
• Navigate (cd) into the repository folder in your console
• Open up the repository folder in your code editor
  • If you're using Visual Studio Code, the command is code .
• In your terminal, navigate into the js directory -- this directory contains the working Javascript program
  • Run the command npm install -- this will install the modules necessary for the automated tests to run
• Run the automated tests with npm test. You should see:

  % npm test

  > [email protected] test
  > jest

   PASS  test/contacts.test.js
   PASS  test/main.test.js

  Test Suites: 2 passed, 2 total
  Tests:       10 passed, 10 total
  Snapshots:   0 total
  Time:        0.18 s, estimated 1 s
  Ran all test suites.

• Open up js/src/main.js and js/src/contacts.js. These files contain the working Contacts program in Javascript
  • Read it over and understand it -- it should be simple for you at this stage of the game!
• Run the program with node src/main.js. Play with it and understand its operation
• You do not need to touch anything in the js/test directory; those are the automated tests

• Now, open up python/src/main.py and python/src/contacts.py
• You'll be writing the Python version of the Contacts program in these two files
• To run the program, navigate to the python directory in your terminal and run python src/main.py
  • Build your program up bit by bit and make sure it runs correctly! Run it often!
• You do not need to touch anything in the python/test directory; those are the automated tests

• First, write python/src/main.py
• Open up js/src/main.js and python/src/main.py side by side, and translate the code line-by-line
  • You should stay as faithful as you can to the original Javascript, and try to figure out the exact Python equivalent code
• You haven't learned about functions or importing modules in Python yet, but those parts have already been stubbed out for you
  • Fill out the addressbook variable by using what you know about Python lists and dictionaries
  • Implement the menu() function -- replace the word pass with your code. (pass is a valid line of Python code that does... absolutely nothing)
  • Implement the main() function -- again replace the word pass with your code
    • You'll have to call the menu() function from within the main() function. How do you call a function in Python? Exactly the same as in Javascript!
• To check that you wrote up python/src/main.py correctly:
  • Navigate to the python directory in your terminal
  • Run python test/test_main.py
  • You should see:

% python test/test_main.py
.....
----------------------------------------------------------------------
Ran 5 tests in 0.003s

OK

const promptSync = require('prompt-sync');
const prompt = promptSync({ sigint: true });

• Next, write python/src/contacts.py
• Open up js/src/contacts.js and python/src/contacts.py side by side, and translate the code line-by-line
  • You should stay as faithful as you can to the original Javascript, and try to figure out the exact Python equivalent code
• Again, the functions have been stubbed out for you; you only have to implement the body of each function
  • Start with the show_contacts() function
  • Next, implement the add_contact() function
    • You'll need to remember how to add items to a Python list. Consult your class notes from the Python Containers lesson!
  • Finally, implement the delete_contact() function, which is the hardest one (but not that much harder given where you are now in your learning)
    • You'll need to recall how to use Python Ranges -- consult your class notes from the Python Control Flow lesson!
• To check that you wrote up python/src/contacts.py correctly:
  • Navigate to the python directory in your terminal
  • Run python test/test_contacts.py
  • You should see:

% python test/test_contacts.py
.....
----------------------------------------------------------------------
Ran 5 tests in 0.001s

OK

const promptSync = require('prompt-sync');
const prompt = promptSync({ sigint: true });

• To check that you did everything right, you should:
  • Navigate to the python directory in your terminal
  • Run python -m unittest
  • You should see:

% python -m unittest
..........
----------------------------------------------------------------------
Ran 10 tests in 0.003s

OK