# 6.9. Boolean Algebra¶

## 6.9.1. Rationale¶

>>> True and True or False
True
>>>
>>> False and False or True
True

>>> (True and True) or False
True
>>>
>>> True and (True or False)
True

>>> True and False or False
False
>>>
>>> True and (False or False)
False


## 6.9.2. Example¶

>>> firstname = 'Mark'
>>> lastname = 'Watney'
>>>
>>>
>>> (firstname == 'Mark' and lastname == 'Watney') \
...     or (firstname == 'Melissa' and lastname == 'Lewis') \
...     or (firstname == 'Rick' and lastname == 'Martinez')
True


Because:

>>> firstname = 'Mark'
>>> lastname = 'Watney'
>>>
>>>
>>> firstname == 'Mark' and lastname == 'Watney'
True
>>>
>>> firstname == 'Melissa' and lastname == 'Lewis'
False
>>>
>>> firstname == 'Rick' and lastname == 'Martinez'
False


Rule:

>>> True or False or False
True


## 6.9.3. Control Flow¶

• Use parenthesis for explicit order

>>> firstname = 'José'
>>> lastname = 'Jiménez'
>>>
>>> if (firstname == 'Mark' and lastname == 'Watney') \
...         or (firstname == 'Jan' and lastname == 'Twardowski') \
...         or (firstname == 'Melissa' and lastname == 'Lewis'):
...
...     print('Hello astronaut')
... else:
...     print('Sorry, astronauts only')
Sorry, astronauts only


## 6.9.4. Good Practices¶

>>>
... for line in file:
...     if line and (not line.startswith('#') or not line.isspace()):
...         ...

>>>
... for line in file:
...     if len(line) == 0:
...         continue
...
...     if line.startswith('#'):
...         continue
...
...     if line.isspace():
...         continue


## 6.9.5. Assignments¶

"""
* Assignment: Conditional BooleanAlgebra BloodPressure
* Required: yes
* Complexity: medium
* Lines of code: 10 lines
* Time: 13 min

English:
1. Table contains Blood Pressure classification according to American Heart Association [1]
2. User inputs blood pressure in XXX/YY or XXX/YYY format
3. User will not try to input invalid data
4. Data format:
a. XXX: int systolic pressure
b. YY: int or YYY: int diastolic pressure
5. Print status of given blood pressure
6. If systolic and diastolic values are in different categories, assume worst case
7. Run doctests - all must succeed

Polish:
1. Tabela zawiera klasyfikację ciśnienia krwi wg American Heart Association [1]
2. Użytkownik wprowadza ciśnienie krwi w formacie XXX/YY lub XXX/YYY
3. Użytkownik nie będzie próbował wprowadzać danych niepoprawnych
4. Format danych:
a. XXX: int to wartość ciśnienia skurczowego (ang. *systolic*)
b. YY: int lub YYY: int to wartość ciśnienia rozkurczowego (ang. *diastolic*)
5. Wypisz status wprowadzonego ciśnienia krwi
6. Gdy wartości ciśnienia skurczowego i rozkurczowego należą do różnych kategorii, przyjmij gorszy przypadek
7. Uruchom doctesty - wszystkie muszą się powieść

Hints:
* and
* or

References:
[1] Whelton, Paul K. and et al.
2017 ACC/AHA/AAPA/ABC/ACPM/AGS/APhA/ASH/ASPC/NMA/PCNA Guideline for the
Prevention, Detection, Evaluation, and Management of High Blood Pressure
in Adults: Executive Summary: A Report of the American College of
Cardiology/American Heart Association Task Force on Clinical Practice Guidelines.
Journal of Hypertension. vol 71. pages 1269–1324. 2018. doi: 10.1161/HYP.0000000000000066

Tests:
TODO: Better Tests

>>> import sys; sys.tracebacklimit = 0

>>> assert result is not Ellipsis, 'Assign result to variable: result'
>>> assert type(result) is str, 'Variable result has invalid type, should be str'

>>> result in (STATUS_NORMAL, STATUS_ELEVATED, STATUS_HYPERTENSION_STAGE_1,
...            STATUS_HYPERTENSION_STAGE_2, STATUS_HYPERTENSIVE_CRISIS)
True

>>> assert blood_pressure == '119/79' and result == 'Normal' or True
>>> assert blood_pressure == '120/80' and result == 'Hypertension stage 1' or True
>>> assert blood_pressure == '121/79' and result == 'Elevated' or True
>>> assert blood_pressure == '120/81' and result == 'Hypertension stage 1' or True
>>> assert blood_pressure == '125/85' and result == 'Hypertension stage 1' or True
>>> assert blood_pressure == '130/80' and result == 'Hypertension stage 1' or True
>>> assert blood_pressure == '130/89' and result == 'Hypertension stage 1' or True
>>> assert blood_pressure == '130/100' and result == 'Hypertension stage 2' or True
>>> assert blood_pressure == '140/85' and result == 'Hypertension stage 2' or True
>>> assert blood_pressure == '140/89' and result == 'Hypertension stage 2' or True
>>> assert blood_pressure == '141/90' and result == 'Hypertension stage 2' or True
>>> assert blood_pressure == '141/91' and result == 'Hypertension stage 2' or True
>>> assert blood_pressure == '180/120' and result == 'Hypertensive Crisis' or True
>>> assert blood_pressure == '181/121' and result == 'Hypertensive Crisis' or True
>>> assert blood_pressure == '181/50' and result == 'Hypertensive Crisis' or True
>>> assert blood_pressure == '100/121' and result == 'Hypertensive Crisis' or True
>>> assert blood_pressure == '181/121' and result == 'Hypertensive Crisis' or True
"""

from unittest.mock import MagicMock

# Simulate user input (for test automation)
input = MagicMock(side_effect=['119/79', '120/80', '121/79',
'120/81', '130/80', '130/89',
'140/85', '140/89', '141/90',
'141/91', '180/120', '181/121',
'181/50', '100/121', '181/121'])

STATUS_NORMAL = 'Normal'
STATUS_ELEVATED = 'Elevated'
STATUS_HYPERTENSION_STAGE_1 = 'Hypertension stage 1'
STATUS_HYPERTENSION_STAGE_2 = 'Hypertension stage 2'
STATUS_HYPERTENSIVE_CRISIS = 'Hypertensive Crisis'

blood_pressure = input('What is your Blood Pressure?: ')
systolic, diastolic = blood_pressure.strip().split('/')
systolic = int(systolic)
diastolic = int(diastolic)

# | Blood Pressure Category | Systolic [mm Hg] | Operator | Diastolic [mm Hg] |
# |-------------------------|------------------|----------|-------------------|
# | Normal                  | Less than 120    | and      | Less than 80      |
# | Elevated                | 120-129          | and      | Less than 80      |
# | Hypertension stage 1    | 130-139          | or       | 80-89             |
# | Hypertension stage 2    | 140 or higher    | or       | 90 or higher      |
# | Hypertensive Crisis     | Higher than 180  | and/or   | Higher than 120   |

# str: one of the STATUS_*
result = ...