# 3.1. Numeric Int¶

• Represents integer

• Could be both signed and unsigned

• There is no maximal or minimal int value

• Default int size is 64 bit

• Python automatically extends int when need bigger number

## 3.1.1. Syntax¶

• Signed and Unsigned

• Use _ for thousand separator

>>> data = 1
>>> data = +1
>>> data = -1


You can use _ for easier read especially with big numbers:

>>> million = 1000000
>>> million = 1_000_000
>>>
>>> print(million)
1000000


## 3.1.2. Type Conversion¶

• Builtin function int() converts argument to int

• It is not rounding

• Works with strings, if all characters could be converted to int

• Supports only: +, - and _ (underscore)

Builtin function int() converts argument to int:

>>> int(1)
1
>>>
>>> int(+1)
1
>>>
>>> int(-1)
-1

>>> int(1.337)
1
>>>
>>> int(+1.1337)
1
>>>
>>> int(-1.337)
-1

>>> int('1')
1
>>>
>>> int('+1')
1
>>>
>>> int('-1')
-1

>>> int('1_000_000')
1000000
>>>
>>> int('-1_000_000')
-1000000


## 3.1.3. Type Conversion Errors¶

• Works with strings, if all characters could be converted to int

• It is not validator or parser to extract all numbers from str

Builtin function int() fails when in argument there are parameters other than a digit, + or - sign and _

>>> int('3.1337')
Traceback (most recent call last):
ValueError: invalid literal for int() with base 10: '3.1337'

>>> int('+3.1337')
Traceback (most recent call last):
ValueError: invalid literal for int() with base 10: '+3.1337'

>>> int('-3.1337')
Traceback (most recent call last):
ValueError: invalid literal for int() with base 10: '-3.1337'

>>> int('3,1337')
Traceback (most recent call last):
ValueError: invalid literal for int() with base 10: '3,1337'

>>> int('+3,1337')
Traceback (most recent call last):
ValueError: invalid literal for int() with base 10: '+3,1337'

>>> int('-3,1337')
Traceback (most recent call last):
ValueError: invalid literal for int() with base 10: '-3,1337'


## 3.1.4. Rounding¶

• Builtin function int() does not round numbers - only converts to int

• Use round() for numbers rounding

Builtin function int() does not round numbers:

>>> int(1.111)
1
>>>
>>> int(1.999)
1


Builtin function round() does that:

>>> round(1.111)
1
>>>
>>> round(1.999)
2


## 3.1.5. Use Case - 0x01¶

>>> SECOND = 1
>>> MINUTE = 60 * SECOND
>>> HOUR = 60 * MINUTE
>>> DAY = 24 * HOUR
>>>
>>>
>>> duration = 123456 * SECOND
>>>
>>> duration // DAY
1
>>> duration // HOUR
34
>>> duration // MINUTE
2057
>>> duration // SECOND
123456


## 3.1.6. Use Case - 0x02¶

>>> m = 1
>>> km = 1000 * m
>>> mi = 1652 * m
>>>
>>>
>>> distance = 123*mi
>>>
>>> distance // m
203196
>>> distance // km
203


## 3.1.7. Use Case - 0x03¶

>>> PLN = 1
>>> EUR = 4.71 * PLN  # 2023-03-19 17:00 GMT+1
>>> USD = 4.41 * PLN  # 2023-03-19 17:00 GMT+1
>>>
>>>
>>> price = 100*PLN
>>>
>>> round(price // EUR)
21
>>> round(price // USD)
22


## 3.1.8. Assignments¶

"""
* Assignment: Type Int Time
* Type: class assignment
* Complexity: easy
* Lines of code: 5 lines
* Time: 3 min

English:
1. Define variables for:
a. second: 1 second
b: minute: 60 seconds
c. hour: 60 minutes
d. day: 24 hours
e. week: 7 days
2. All variables must be in seconds
3. Run doctests - all must succeed

Polish:
1. Zdefiniuj zmienne dla:
a. second: 1 sekunda
b: minute: 60 sekund
c. hour: 60 minut
d. day: 24 godzin
e. week: 7 dni
2. Wszystkie zmienne muszą być wyrażone w sekundach
3. Uruchom doctesty - wszystkie muszą się powieść

Tests:
>>> import sys; sys.tracebacklimit = 0

>>> assert second is not Ellipsis, \
'Assign your result to variable second'
>>> assert minute is not Ellipsis, \
'Assign your result to variable minute'
>>> assert hour is not Ellipsis, \
'Assign your result to variable hour'
>>> assert day is not Ellipsis, \
'Assign your result to variable day'
>>> assert week is not Ellipsis, \
'Assign your result to variable week'
>>> assert type(second) is int, \
'Variable second has invalid type, should be int'
>>> assert type(minute) is int, \
'Variable minute has invalid type, should be int'
>>> assert type(hour) is int, \
'Variable hour has invalid type, should be int'
>>> assert type(day) is int, \
'Variable day has invalid type, should be int'
>>> assert type(week) is int, \
'Variable week has invalid type, should be int'

>>> assert second == 1, \
'Variable second has invalid value. Check your calculation.'
>>> assert minute == 60, \
'Variable minute has invalid value. Check your calculation.'
>>> assert hour == 3600, \
'Variable hour has invalid value. Check your calculation.'
>>> assert day == 86400, \
'Variable day has invalid value. Check your calculation.'
>>> assert week == 604800, \
'Variable week has invalid value. Check your calculation.'
"""

# second: 1 second
# type: int
second = ...

# minute: 60 seconds
# type: int
minute = ...

# hour: 60 minutes
# type: int
hour = ...

# day: 24 hours
# type: int
day = ...

# week: 7 days
# type: int
week = ...


"""
* Assignment: Type Int Time
* Type: class assignment
* Complexity: easy
* Lines of code: 4 lines
* Time: 3 min

English:
1. Define variables for:
a. workbreak: 10 minutes
b. workday: 8 hours
c. workweek: 5 days
d. workmonth: 4 weeks
2. All variables must be in seconds
3. Run doctests - all must succeed

Polish:
1. Zdefiniuj zmienne dla:
a. workbreak: 10 minut
b. workday: 8 godzin
c. workweek: 5 dni
d. workmonth: 4 tygodnie
2. Wszystkie zmienne muszą być wyrażone w sekundach
3. Uruchom doctesty - wszystkie muszą się powieść

Tests:
>>> import sys; sys.tracebacklimit = 0

>>> assert workbreak is not Ellipsis, \
'Assign your result to variable workbreak'
>>> assert workday is not Ellipsis, \
'Assign your result to variable workday'
>>> assert workweek is not Ellipsis, \
'Assign your result to variable workweek'
>>> assert workmonth is not Ellipsis, \
'Assign your result to variable workmonth'

>>> assert type(workbreak) is int, \
'Variable workbreak has invalid type, should be int'
>>> assert type(workday) is int, \
'Variable workday has invalid type, should be int'
>>> assert type(workweek) is int, \
'Variable workweek has invalid type, should be int'
>>> assert type(workmonth) is int, \
'Variable workmonth has invalid type, should be int'

>>> assert workbreak == 600, \
'Variable workbreak has invalid value. Check your calculation.'
>>> assert workday == 28_800, \
'Variable workday has invalid value. Check your calculation.'
>>> assert workweek == 432_000, \
'Variable workweek has invalid value. Check your calculation.'
>>> assert workmonth == 2_419_200, \
'Variable workmonth has invalid value. Check your calculation.'
"""

SECOND = 1
MINUTE = 60 * SECOND
HOUR = 60 * MINUTE
DAY = 24 * HOUR
WEEK = 7 * DAY

# workbreak: 10 minutes
# type: int
workbreak = ...

# workday: 8 hours
# type: int
workday = ...

# workweek: 5 days
# type: int
workweek = ...

# workmonth: 4 weeks
# type: int
workmonth = ...


"""
* Assignment: Type Int Time
* Type: class assignment
* Complexity: easy
* Lines of code: 5 lines
* Time: 3 min

English:
1. Define variables for:
a. result_a: 69 seconds
b. result_b: 13 minutes 37 seconds
c. result_c: 2 hours 56 minutes
d. result_d: 1 day 2 hours 8 minutes
e. result_e: 3 weeks 1 day 3 hours 3 minutes 7 seconds
2. All variables must be in seconds
3. Run doctests - all must succeed

Polish:
1. Zdefiniuj zmienne dla:
a. result_a: 69 sekunda
b. result_b: 13 minut 37 sekund
c. result_c: 2 godziny 56 minut
d. result_d: 1 dzień 2 godziny 8 minut
e. result_e: 3 tygodnie 1 dzień 3 godziny 3 minuty 7 sekund
2. Wszystkie zmienne muszą być wyrażone w sekundach
3. Uruchom doctesty - wszystkie muszą się powieść

Tests:
>>> import sys; sys.tracebacklimit = 0

>>> assert result_a is not Ellipsis, \
'Assign your result to variable result_a'
>>> assert result_b is not Ellipsis, \
'Assign your result to variable result_b'
>>> assert result_c is not Ellipsis, \
'Assign your result to variable result_c'
>>> assert result_d is not Ellipsis, \
'Assign your result to variable result_d'
>>> assert result_e is not Ellipsis, \
'Assign your result to variable result_e'
>>> assert type(result_a) is int, \
'Variable result_a has invalid type, should be int'
>>> assert type(result_b) is int, \
'Variable result_b has invalid type, should be int'
>>> assert type(result_c) is int, \
'Variable result_c has invalid type, should be int'
>>> assert type(result_d) is int, \
'Variable result_d has invalid type, should be int'
>>> assert type(result_e) is int, \
'Variable result_e has invalid type, should be int'

>>> assert result_a == 69, \
'Variable result_a has invalid value. Check your calculation.'
>>> assert result_b == 817, \
'Variable result_b has invalid value. Check your calculation.'
>>> assert result_c == 10560, \
'Variable result_c has invalid value. Check your calculation.'
>>> assert result_d == 94080, \
'Variable result_d has invalid value. Check your calculation.'
>>> assert result_e == 1911787, \
'Variable result_e has invalid value. Check your calculation.'
"""

SECOND = 1
MINUTE = 60 * SECOND
HOUR = 60 * MINUTE
DAY = 24 * HOUR
WEEK = 7 * DAY

# 69 seconds
# type: int
result_a = ...

# 13 minutes 37 seconds
# type: int
result_b = ...

# 2 hours 56 minutes
# type: int
result_c = ...

# 1 day 2 hours 8 minutes
# type: int
result_d = ...

# 3 weeks 1 day 3 hours 3 minutes 7 seconds
# type: int
result_e = ...


"""
* Assignment: Type Int Time
* Type: class assignment
* Complexity: easy
* Lines of code: 6 lines
* Time: 3 min

English:
1. Calculate how many seconds is one day (24 hours)
2. Calculate how many minutes is one week (7 days)
3. Calculate how many hours is in one month (31 days)
4. Calculate how many seconds is work day (8 hours)
5. Calculate how many minutes is work week (5 work days)
6. Calculate how many hours is work month (22 work days)
7. In Calculations use floordiv (//)
8. Run doctests - all must succeed

Polish:
1. Oblicz ile sekund to jedna doba (24 godziny)
2. Oblicz ile minut to jeden tydzień (7 dni)
3. Oblicz ile godzin to jeden miesiąc (31 dni)
4. Oblicz ile sekund to dzień pracy (8 godzin)
5. Oblicz ile minut to tydzień pracy (5 dni pracy)
6. Oblicz ile godzin to miesiąc pracy (22 dni pracy)
7. W obliczeniach użyj floordiv (//)
8. Uruchom doctesty - wszystkie muszą się powieść

Hint:
* Use // to get floor division as int

Tests:
>>> import sys; sys.tracebacklimit = 0

>>> assert day is not Ellipsis, \
'Assign your result to variable day'
>>> assert week is not Ellipsis, \
'Assign your result to variable week'
>>> assert month is not Ellipsis, \
'Assign your result to variable month'
>>> assert workday is not Ellipsis, \
'Assign your result to variable workday'
>>> assert workweek is not Ellipsis, \
'Assign your result to variable workweek'
>>> assert workmonth is not Ellipsis, \
'Assign your result to variable workmonth'
>>> assert type(day) is int, \
'Variable day has invalid type, should be int'
>>> assert type(week) is int, \
'Variable week has invalid type, should be int'
>>> assert type(month) is int, \
'Variable month has invalid type, should be int'
>>> assert type(workday) is int, \
'Variable workday has invalid type, should be int'
>>> assert type(workweek) is int, \
'Variable workweek has invalid type, should be int'
>>> assert type(workmonth) is int, \
'Variable workmonth has invalid type, should be int'

>>> assert day == 86400, \
'Variable day has invalid value. Check your calculation.'
>>> assert week == 10080, \
'Variable week has invalid value. Check your calculation.'
>>> assert month == 744, \
'Variable month has invalid value. Check your calculation.'
>>> assert workday == 28800, \
'Variable workday has invalid value. Check your calculation.'
>>> assert workweek == 2400, \
'Variable workweek has invalid value. Check your calculation.'
>>> assert workmonth == 176, \
'Variable workmonth has invalid value. Check your calculation.'
"""

SECOND = 1
MINUTE = 60 * SECOND
HOUR = 60 * MINUTE
DAY = 24 * HOUR

# 1 day in seconds
# type: int
day = ...

# 7 days in minutes
# type: int
week = ...

# 31 days in hours
# type: int
month = ...

# 8 hours in seconds
# type: int
workday = ...

# 5 workdays in minutes
# type: int
workweek = ...

# 22 workdays in hours
# type: int
workmonth = ...


"""
* Type: class assignment
* Complexity: easy
* Lines of code: 3 lines
* Time: 3 min

English:
1. Define average temperatures at surface of Mars [1]:
a. highest: 20 °C
b. lowest: -153 °C
c. average: −63 °C
2. Run doctests - all must succeed

Polish:
1. Zdefiniuj średnie temperatury powierzchni Marsa [1]:
a. najwyższa: 20 °C
b. najniższa: -153 °C
c. średnia: −63 °C
2. Uruchom doctesty - wszystkie muszą się powieść

References:
[1] Centro de Astrobiología (CSIC-INTA).
Rover Environmental Monitoring Station, Mars Science Laboratory (NASA).
Year: 2019.
Retrieved: 2019-08-06.
URL: http://cab.inta-csic.es/rems/marsweather.html

Tests:
>>> import sys; sys.tracebacklimit = 0

>>> assert mars_highest is not Ellipsis, \
'Assign your result to variable mars_highest'
>>> assert mars_lowest is not Ellipsis, \
'Assign your result to variable mars_lowest'
>>> assert mars_lowest is not Ellipsis, \
'Assign your result to variable mars_lowest'
>>> assert type(mars_highest) is int, \
'Variable mars_highest has invalid type, should be int'
>>> assert type(mars_lowest) is int, \
'Variable mars_lowest has invalid type, should be int'
>>> assert type(mars_lowest) is int, \
'Variable mars_average has invalid type, should be int'

>>> assert mars_highest == 20, \
'Invalid value for mars_highest, should be 20. Check you calculation'
>>> assert mars_lowest == -153, \
'Invalid value for mars_lowest, should be -153. Check you calculation'
>>> assert mars_average == -63, \
'Invalid value for mars_average, should be -63. Check you calculation'

"""

Celsius = 1

# Martian highest temperature: 20 Celsius
# type: int
mars_highest = ...

# Martian lowest temperature: -153 Celsius
# type: int
mars_lowest = ...

# Martian average temperature: -63 Celsius
# type: int
mars_average = ...


"""
* Type: class assignment
* Complexity: easy
* Lines of code: 3 lines
* Time: 3 min

English:
1. One Kelvin is equal to 1 Celsius degree (1K = 1°C)
2. Zero Celsius degrees is equal to 273.15 Kelvins
3. For calculation use round number 273 (0°C = 273K)
4. How many Kelvins has average temperatures at surface [1]:
a. Mars highest: 20 °C
b. Mars lowest: -153 °C
c. Mars average: −63 °C
5. Run doctests - all must succeed

Polish:
1. Jeden Kelwin to jeden stopień Celsiusza (1K = 1°C)
2. Zero stopni Celsiusza to 273.15 Kelwiny
3. W zadaniu przyjmij równe 273°C (0°C = 273K)
4. Ile Kelwinów wynoszą średnie temperatury powierzchni [1]:
a. Mars najwyższa: 20 °C
b. Mars najniższa: -153 °C
c. Mars średnia: −63 °C
5. Uruchom doctesty - wszystkie muszą się powieść

Hint:
* Use only +273 and -273

References:
[1] Centro de Astrobiología (CSIC-INTA).
Rover Environmental Monitoring Station, Mars Science Laboratory (NASA).
Year: 2019.
Retrieved: 2019-08-06.
URL: http://cab.inta-csic.es/rems/marsweather.html

Tests:
>>> import sys; sys.tracebacklimit = 0

>>> assert mars_highest is not Ellipsis, \
'Assign your result to variable mars_highest'
>>> assert mars_lowest is not Ellipsis, \
'Assign your result to variable mars_lowest'
>>> assert mars_lowest is not Ellipsis, \
'Assign your result to variable mars_lowest'
>>> assert type(mars_highest) is int, \
'Variable mars_highest has invalid type, should be int'
>>> assert type(mars_lowest) is int, \
'Variable mars_lowest has invalid type, should be int'
>>> assert type(mars_lowest) is int, \
'Variable mars_average has invalid type, should be int'

>>> assert mars_highest == 293, \
'Invalid value for mars_highest, should be 293. Check you calculation'
>>> assert mars_lowest == 120, \
'Invalid value for mars_lowest, should be 120. Check you calculation'
>>> assert mars_average == 210, \
'Invalid value for mars_average, should be 210. Check you calculation'

"""

Celsius = 1
Kelvin = 273

MARS_HIGHEST = 20*Celsius
MARS_LOWEST = -153*Celsius
MARS_AVERAGE = -63*Celsius

# Martian highest temperature: 20 Celsius in Kelvin
# type: int
mars_highest = ...

# Martian lowest temperature: -153 Celsius in Kelvin
# type: int
mars_lowest = ...

# Martian average temperature: -63 Celsius in Kelvin
# type: int
mars_average = ...


"""
* Assignment: Type Int Sub
* Type: class assignment
* Complexity: easy
* Lines of code: 2 lines
* Time: 2 min

English:
1. Define average temperatures at surface of Moon [1]:
a. day: 453 K
b. night: 93 K
2. Run doctests - all must succeed

Polish:
1. Zdefiniuj średnie temperatury powierzchni Księżyca [1]:
a. dzień: 453 K
b. noc: 93 K
2. Uruchom doctesty - wszystkie muszą się powieść

References:
[1] Centro de Astrobiología (CSIC-INTA).
Rover Environmental Monitoring Station, Mars Science Laboratory (NASA).
Year: 2019.
Retrieved: 2019-08-06.
URL: http://cab.inta-csic.es/rems/marsweather.html

Tests:
>>> import sys; sys.tracebacklimit = 0

>>> assert lunar_day is not Ellipsis, \
'Assign your result to variable lunar_day'
>>> assert lunar_night is not Ellipsis, \
'Assign your result to variable lunar_night'
>>> assert type(lunar_day) is int, \
'Variable lunar_day has invalid type, should be int'
>>> assert type(lunar_night) is int, \
'Variable lunar_night has invalid type, should be int'

>>> assert lunar_day == 453, \
'Invalid value for lunar_day, should be 453. Check you calculation'
>>> assert lunar_night == 93, \
'Invalid value for lunar_night, should be 93. Check you calculation'
"""

Kelvin = 1

# Lunar day: 453 Kelvins
# type: int
lunar_day = ...

# Lunar night: 93 Kelvins
# type: int
lunar_night = ...


"""
* Assignment: Type Int Sub
* Type: class assignment
* Complexity: easy
* Lines of code: 2 lines
* Time: 2 min

English:
1. One Kelvin is equal to 1 Celsius degree (1K = 1°C)
2. Zero Kelvin (absolute) is equal to -273.15 Celsius degrees
3. For calculation use round number -273 (0K = -273°C)
4. How many Celsius degrees has average temperatures at surface [1]:
a. Lunar day: 453 K
b. Lunar night: 93 K
5. Run doctests - all must succeed

Polish:
1. Jeden Kelwin to jeden stopień Celsiusza (1K = 1°C)
2. Zero Kelwina (bezwzględne) to -273.15 stopni Celsiusza
3. W zadaniu przyjmij równe -273°C (0K = -273°C)
4. Ile stopni Celsiusza wynoszą średnie temperatury powierzchni [1]:
a. Księżyca w dzień: 453 K
b. Księżyca w nocy: 93 K
5. Uruchom doctesty - wszystkie muszą się powieść

Hint:
* Use only +273 and -273

References:
[1] Centro de Astrobiología (CSIC-INTA).
Rover Environmental Monitoring Station, Mars Science Laboratory (NASA).
Year: 2019.
Retrieved: 2019-08-06.
URL: http://cab.inta-csic.es/rems/marsweather.html

Tests:
>>> import sys; sys.tracebacklimit = 0

>>> assert lunar_day is not Ellipsis, \
'Assign your result to variable lunar_day'
>>> assert lunar_night is not Ellipsis, \
'Assign your result to variable lunar_night'
>>> assert type(lunar_day) is int, \
'Variable lunar_day has invalid type, should be int'
>>> assert type(lunar_night) is int, \
'Variable lunar_night has invalid type, should be int'

>>> assert lunar_day == 180, \
'Invalid value for lunar_day, should be 180. Check you calculation'
>>> assert lunar_night == -180, \
'Invalid value for lunar_night, should be -180. Check you calculation'
"""

Celsius = 273
Kelvin = 1

LUNAR_DAY = 453*Kelvin
LUNAR_NIGHT = 93*Kelvin

# Lunar day: 453 Kelvin in Celsius
# type: int
lunar_day = ...

# Lunar night: 93 Kelvin in Celsius
# type: int
lunar_night = ...


"""
* Assignment: Type Int Mul
* Type: class assignment
* Complexity: easy
* Lines of code: 3 lines
* Time: 3 min

English:
1. Define altitude in kilometers:
a. Armstrong Limit: 19 km
b. Stratosphere: 20 km
c. USAF Space Line: 80 km
d. IAF Space Line: 100 km
2. Run doctests - all must succeed

Polish:
1. Zdefiniuj wysokości w kilometrach:
a. Linia Armstronga: 19 km
b. Stratosfera: 20 km
c. Granica kosmosu wg. USAF: 80 km
d. Granica kosmosu wg. IAF 100 km
2. Uruchom doctesty - wszystkie muszą się powieść

References:
* USAF - United States Air Force
* IAF - International Astronautical Federation
* Kármán line (100 km) - boundary between Earth's atmosphere and space
* Armstrong limit (19 km) - altitude above which atmospheric pressure is
sufficiently low that water boils at the temperature of the human body

Tests:
>>> import sys; sys.tracebacklimit = 0

>>> assert armstrong_limit is not Ellipsis, \
'Assign your result to variable armstrong_limit'
>>> assert stratosphere is not Ellipsis, \
'Assign your result to variable stratosphere'
>>> assert usaf_space is not Ellipsis, \
'Assign your result to variable usaf_space'
>>> assert iaf_space is not Ellipsis, \
'Assign your result to variable iaf_space'
>>> assert type(armstrong_limit) is int, \
'Variable armstrong_limit has invalid type, should be int'
>>> assert type(stratosphere) is int, \
'Variable stratosphere has invalid type, should be int'
>>> assert type(usaf_space) is int, \
'Variable usaf_space has invalid type, should be int'
>>> assert type(iaf_space) is int, \
'Variable iaf_space has invalid type, should be int'

>>> assert armstrong_limit == 19_000, \
'Invalid value for armstrong_limit. Check you calculation'
>>> assert stratosphere == 20_000, \
'Invalid value for stratosphere. Check you calculation'
>>> assert usaf_space == 80_000, \
'Invalid value for usaf_space. Check you calculation'
>>> assert iaf_space == 100_000, \
'Invalid value for iaf_space. Check you calculation'
"""

m = 1
km = 1000 * m

# Armstrong limit: 19 kilometers
# type: int
armstrong_limit = ...

# Stratosphere: 20 kilometers
# type: int
stratosphere = ...

# USAF space line: 80 kilometers
# type: int
usaf_space = ...

# IAF space line: 100 kilometers
# type: int
iaf_space = ...


"""
* Assignment: Type Int Mul
* Type: class assignment
* Complexity: easy
* Lines of code: 4 lines
* Time: 3 min

English:
1. Calculate altitude in meters:
a. Armstrong Limit: 19 km
b. Stratosphere: 20 km
c. USAF Space Line: 80 km
d. IAF Space Line: 100 km
2. Run doctests - all must succeed

Polish:
1. Oblicz wysokości w metrach:
a. Linia Armstronga: 19 km
b. Stratosfera: 20 km
c. Granica kosmosu wg. USAF: 80 km
d. Granica kosmosu wg. IAF 100 km
2. Uruchom doctesty - wszystkie muszą się powieść

References:
* USAF - United States Air Force
* IAF - International Astronautical Federation
* Kármán line (100 km) - boundary between Earth's atmosphere and space
* Armstrong limit (19 km) - altitude above which atmospheric pressure is
sufficiently low that water boils at the temperature of the human body

Hints:
* 1 km = 1000 m
* Use // to get floor division as int

Tests:
>>> import sys; sys.tracebacklimit = 0

>>> assert armstrong_limit is not Ellipsis, \
'Assign your result to variable armstrong_limit'
>>> assert stratosphere is not Ellipsis, \
'Assign your result to variable stratosphere'
>>> assert usaf_space is not Ellipsis, \
'Assign your result to variable usaf_space'
>>> assert iaf_space is not Ellipsis, \
'Assign your result to variable iaf_space'
>>> assert type(armstrong_limit) is int, \
'Variable armstrong_limit has invalid type, should be int'
>>> assert type(stratosphere) is int, \
'Variable stratosphere has invalid type, should be int'
>>> assert type(usaf_space) is int, \
'Variable usaf_space has invalid type, should be int'
>>> assert type(iaf_space) is int, \
'Variable iaf_space has invalid type, should be int'

>>> assert armstrong_limit == 19_000, \
'Invalid value for armstrong_limit. Check you calculation'
>>> assert stratosphere == 20_000, \
'Invalid value for stratosphere. Check you calculation'
>>> assert usaf_space == 80_000, \
'Invalid value for usaf_space. Check you calculation'
>>> assert iaf_space == 100_000, \
'Invalid value for iaf_space. Check you calculation'
"""

m = 1
km = 1000 * m

ARMSTRONG_LIMIT = 19*km
STRATOSPHERE = 20*km
USAF_SPACE = 80*km
IAF_SPACE = 100*km

# Armstrong line: 19 kilometers in meters
# type: int
armstrong_limit = ...

# Stratosphere: 20 kilometers in meters
# type: int
stratosphere = ...

# USAF space line: 80 kilometers in meters
# type: int
usaf_space = ...

# IAF space line: 100 kilometers in meters
# type: int
iaf_space = ...


"""
* Assignment: Type Int Truediv
* Type: class assignment
* Complexity: easy
* Lines of code: 3 lines
* Time: 3 min

English:
1. Define variable in meters:
a. Kármán Line Earth: 100_000 m
b. Kármán Line Mars: 80_000 m
c. Kármán Line Venus: 250_000 m
2. Run doctests - all must succeed

Polish:
1. Zdefiniuj zmienne w metrach:
a. Linia Kármána Ziemia: 100_000 m
b. Linia Kármána Mars: 80_000 m
c. Linia Kármána Wenus: 250_000 m
2. Uruchom doctesty - wszystkie muszą się powieść

References:
* Kármán line (100 km) - boundary between planets's atmosphere and space

Hints:
* 1 km = 1000 m

Tests:
>>> import sys; sys.tracebacklimit = 0

>>> assert karman_line_earth is not Ellipsis, \
'Assign your result to variable karman_line_earth'
>>> assert karman_line_mars is not Ellipsis, \
'Assign your result to variable karman_line_mars'
>>> assert karman_line_venus is not Ellipsis, \
'Assign your result to variable karman_line_venus'
>>> assert type(karman_line_earth) is int, \
'Variable karman_line_earth has invalid type, should be int'
>>> assert type(karman_line_mars) is int, \
'Variable karman_line_mars has invalid type, should be int'
>>> assert type(karman_line_venus) is int, \
'Variable karman_line_venus has invalid type, should be int'

>>> assert karman_line_earth == 100_000, \
'Invalid value for karman_line_earth. Check you calculation'
>>> assert karman_line_mars == 80_000, \
'Invalid value for karman_line_mars. Check you calculation'
>>> assert karman_line_venus == 250_000, \
'Invalid value for usaf_space. Check you calculation'
"""

m = 1
km = 1000 * m

# Kármán Line Earth: 100_000 meters
# type: int
karman_line_earth = ...

# Kármán Line Mars: 80_000 meters
# type: int
karman_line_mars = ...

# Kármán Line Venus: 250_000 meters
# type: int
karman_line_venus = ...


"""
* Assignment: Type Int Truediv
* Type: class assignment
* Complexity: easy
* Lines of code: 3 lines
* Time: 3 min

English:
1. Calculate altitude in kilometers:
a. Kármán Line Earth: 100_000 m
b. Kármán Line Mars: 80_000 m
c. Kármán Line Venus: 250_000 m
2. In Calculations use floordiv (//)
3. Run doctests - all must succeed

Polish:
1. Oblicz wysokości w kilometrach:
a. Linia Kármána Ziemia: 100_000 m
b. Linia Kármána Mars: 80_000 m
c. Linia Kármána Wenus: 250_000 m
2. W obliczeniach użyj floordiv (//)
3. Uruchom doctesty - wszystkie muszą się powieść

References:
* Kármán line (100 km) - boundary between planets's atmosphere and space

Hints:
* 1 km = 1000 m
* Use // to get floor division as int

Tests:
>>> import sys; sys.tracebacklimit = 0

>>> assert karman_line_earth is not Ellipsis, \
'Assign your result to variable karman_line_earth'
>>> assert karman_line_mars is not Ellipsis, \
'Assign your result to variable karman_line_mars'
>>> assert karman_line_venus is not Ellipsis, \
'Assign your result to variable karman_line_venus'
>>> assert type(karman_line_earth) is int, \
'Variable karman_line_earth has invalid type, should be int'
>>> assert type(karman_line_mars) is int, \
'Variable karman_line_mars has invalid type, should be int'
>>> assert type(karman_line_venus) is int, \
'Variable karman_line_venus has invalid type, should be int'

>>> assert karman_line_earth == 100, \
'Invalid value for karman_line_earth. Check you calculation'
>>> assert karman_line_mars == 80, \
'Invalid value for karman_line_mars. Check you calculation'
>>> assert karman_line_venus == 250, \
'Invalid value for usaf_space. Check you calculation'
"""

m = 1
km = 1000 * m

KARMAN_LINE_EARTH = 100_000*m
KARMAN_LINE_MARS = 80_000*m
KARMAN_LINE_VENUS = 250_000*m

# Kármán Line Earth: 100_000 meters in km
# type: int
karman_line_earth = ...

# Kármán Line Mars: 80_000 meters in km
# type: int
karman_line_mars = ...

# Kármán Line Venus: 250_000 meters in km
# type: int
karman_line_venus = ...



## 3.1.9. Homework¶

"""
* Assignment: Type Int Bits
* Type: homework
* Complexity: medium
* Lines of code: 3 lines
* Time: 3 min

English:
1. File size is 1337 megabits [Mb]
2. Calculate size in bits [b]
3. Calculate size in kilobits [kb]
4. In Calculations use floordiv (//)
5. Run doctests - all must succeed

Polish:
1. Wielkość pliku to 1337 megabits [Mb]
2. Oblicz wielkość w bitach [b]
3. Oblicz wielkość w kilobitach [kb]
4. W obliczeniach użyj floordiv (//)
5. Uruchom doctesty - wszystkie muszą się powieść

Hints:
* 1 kb = 1024 b
* 1 Mb = 1024 Kb
* Use // to get floor division as int

Tests:
>>> import sys; sys.tracebacklimit = 0

>>> assert size_bits is not Ellipsis, \
'Assign your result to variable size_bits'
>>> assert size_kilobits is not Ellipsis, \
'Assign your result to variable size_kilobits'
>>> assert size_megabits is not Ellipsis, \
'Assign your result to variable size_megabits'
>>> assert type(size_bits) is int, \
'Variable size_bits has invalid type, should be int'
>>> assert type(size_kilobits) is int, \
'Variable size_kilobits has invalid type, should be int'
>>> assert type(size_megabits) is int, \
'Variable size_megabits has invalid type, should be int'

>>> assert size_bits == 1_401_946_112, \
'Invalid value for size_bits. Check you calculation'
>>> assert size_kilobits == 1_369_088, \
'Invalid value for size_kilobits. Check you calculation'
>>> assert size_megabits == 1337, \
'Invalid value for size_megabits. Check you calculation'
"""

b = 1
kb = 1024 * b
Mb = 1024 * kb

SIZE = 1337 * Mb

# SIZE in bits
# type: int
size_bits = ...

# SIZE in kilobits
# type: int
size_kilobits = ...

# SIZE in megabits
# type: int
size_megabits = ...


"""
* Assignment: Type Int Bytes
* Type: homework
* Complexity: easy
* Lines of code: 2 lines
* Time: 3 min

English:
1. File size is 100 megabytes
2. Calculate size in kilobytes
2. Calculate size in megabits
3. Run doctests - all must succeed

Polish:
1. Wielkość pliku to 100 megabajtów
2. Oblicz wielkość w kilobajtach
2. Oblicz wielkość w megabitach
3. Uruchom doctesty - wszystkie muszą się powieść

Hints:
* 1 Kb = 1024 b
* 1 Mb = 1024 Kb
* 1 B = 8 b
* 1 KB = 1024 B
* 1 MB = 1024 KB
* Use // to get floor division as int

Tests:
>>> import sys; sys.tracebacklimit = 0

>>> assert size_kilobytes is not Ellipsis, \
'Assign your result to variable size_kilobytes'
>>> assert size_megabits is not Ellipsis, \
'Assign your result to variable size_megabits'
>>> assert type(size_kilobytes) is int, \
'Variable size_kilobytes has invalid type, should be int'
>>> assert type(size_megabits) is int, \
'Variable size_megabits has invalid type, should be int'

>>> assert size_kilobytes == 102_400, \
'Invalid value for size_kilobytes. Check you calculation'
>>> assert size_megabits == 800, \
'Invalid value for size_megabits. Check you calculation'
"""

b = 1
kb = 1024 * b
Mb = 1024 * kb

B = 8 * b
kB = 1024 * B
MB = 1024 * kB

SIZE = 100 * MB

# SIZE in kilobytes
# type: int
size_kilobytes = ...

# SIZE in megabits
# type: int
size_megabits = ...


"""
* Assignment: Type Int Bandwidth
* Type: homework
* Complexity: easy
* Lines of code: 3 lines
* Time: 3 min

English:
1. Having internet connection with speed 100 Mb/s
3. To calculate time divide file size by speed
4. Note, that all values must be int (type cast if needed)
5. In Calculations use floordiv (//)
6. Run doctests - all must succeed

Polish:
1. Mając łącze internetowe 100 Mb/s
2. Ile zajmie ściągnięcie pliku 100 MB?
3. Aby wyliczyć czas podziel wielkość pliku przez prękość
4. Zwróć uwagę, że wszystkie wartości mają być int
(rzutuj typ jeżeli potrzeba)
5. W obliczeniach użyj floordiv (//)
6. Uruchom doctesty - wszystkie muszą się powieść

Hints:
* 1 Kb = 1024 b
* 1 Mb = 1024 Kb
* 1 B = 8 b
* 1 KB = 1024 B
* 1 MB = 1024 KB
* Use // to get floor division as int

Tests:
>>> import sys; sys.tracebacklimit = 0

>>> assert bandwidth is not Ellipsis, \
'Assign your result to variable bandwidth'
>>> assert size is not Ellipsis, \
'Assign your result to variable size'
>>> assert duration is not Ellipsis, \
'Assign your result to variable duration'

>>> assert type(bandwidth) is int, \
'Variable bandwidth has invalid type, should be int'
>>> assert type(size) is int, \
'Variable size has invalid type, should be int'
>>> assert type(duration) is int, \
'Variable duration has invalid type, should be int'

>>> assert bandwidth == 104_857_600, \
'Invalid value for bandwidth. Check you calculation'
>>> assert size == 838_860_800, \
'Invalid value for size. Check you calculation'
>>> assert duration == 8, \
'Invalid value for duration. Check you calculation'
"""

SECOND = 1

b = 1
kb = 1024 * b
Mb = 1024 * kb

B = 8 * b
kB = 1024 * B
MB = 1024 * kB

# 100 megabits per second
# type: int
bandwidth = ...

# 100 megabytes
# type: int
size = ...

# Duration is size by bandwidth in seconds
# type: int
duration = ...