## Python, conversion, prefix_conversions.py

``````"""
Convert International System of Units (SI) and Binary prefixes
"""
from __future__ import annotations

from enum import Enum

class SI_Unit(Enum):
yotta = 24
zetta = 21
exa = 18
peta = 15
tera = 12
giga = 9
mega = 6
kilo = 3
hecto = 2
deca = 1
deci = -1
centi = -2
milli = -3
micro = -6
nano = -9
pico = -12
femto = -15
atto = -18
zepto = -21
yocto = -24

class Binary_Unit(Enum):
yotta = 8
zetta = 7
exa = 6
peta = 5
tera = 4
giga = 3
mega = 2
kilo = 1

def convert_si_prefix(
known_amount: float,
known_prefix: str | SI_Unit,
unknown_prefix: str | SI_Unit,
) -> float:
"""
Wikipedia reference: https://en.wikipedia.org/wiki/Binary_prefix
Wikipedia reference: https://en.wikipedia.org/wiki/International_System_of_Units
>>> convert_si_prefix(1, SI_Unit.giga, SI_Unit.mega)
1000
>>> convert_si_prefix(1, SI_Unit.mega, SI_Unit.giga)
0.001
>>> convert_si_prefix(1, SI_Unit.kilo, SI_Unit.kilo)
1
>>> convert_si_prefix(1, 'giga', 'mega')
1000
>>> convert_si_prefix(1, 'gIGa', 'mEGa')
1000
"""
if isinstance(known_prefix, str):
known_prefix = SI_Unit[known_prefix.lower()]
if isinstance(unknown_prefix, str):
unknown_prefix = SI_Unit[unknown_prefix.lower()]
unknown_amount: float = known_amount * (
10 ** (known_prefix.value - unknown_prefix.value)
)
return unknown_amount

def convert_binary_prefix(
known_amount: float,
known_prefix: str | Binary_Unit,
unknown_prefix: str | Binary_Unit,
) -> float:
"""
Wikipedia reference: https://en.wikipedia.org/wiki/Metric_prefix
>>> convert_binary_prefix(1, Binary_Unit.giga, Binary_Unit.mega)
1024
>>> convert_binary_prefix(1, Binary_Unit.mega, Binary_Unit.giga)
0.0009765625
>>> convert_binary_prefix(1, Binary_Unit.kilo, Binary_Unit.kilo)
1
>>> convert_binary_prefix(1, 'giga', 'mega')
1024
>>> convert_binary_prefix(1, 'gIGa', 'mEGa')
1024
"""
if isinstance(known_prefix, str):
known_prefix = Binary_Unit[known_prefix.lower()]
if isinstance(unknown_prefix, str):
unknown_prefix = Binary_Unit[unknown_prefix.lower()]
unknown_amount: float = known_amount * (
2 ** ((known_prefix.value - unknown_prefix.value) * 10)
)
return unknown_amount

if __name__ == "__main__":
import doctest

doctest.testmod()
``````