python2.5.exercise.md

python 2.5 excercises

1. typehints

1. Let mypy (use strict checking) to check types in file python2.5.exercise.mypy.py:
2. Add proper type typehints according to report from previous step

2. test driven development (TDD)

Don't implement functionality as first step. Write tests and after that implement them. See https://en.wikipedia.org/wiki/Test-driven_development#Test-driven_development_cycle

Implement class PasswordVerificator that you can find at plenty forms to create new registration on internet. It took two inputs from user and has following capabilities:

1. Given passphrase has to be min 5 chars long.
2. Took two inputs from user to decide if they are same or not.
3. Calculate strenght by simple metric that will sum points by these rules:
   1. If passphrase contains a number, (+1 point)
   2. If passphrase contains a @ char, (+1 point)
   3. If length of passphrase is bigger than 7 chars, (+1 points)
   4. If passphrase contains a sequence abc, (-2 points)

Scenario: User will provide two input passphrases. Purpose of second passphrase is to notify user, that there is a typo in his input, and it will not be further accepted.

After these two inputs will be given, the class provides a way to check rules (defined above) and tell user what is the strength of given passphrase as sum of points.

Wider context for consideration

Don't implement anything from following paragraph!

We want to calculate statistics from user's behaviour to be able to tell how mamy people do typos, how strong/weak passwords they are using...