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* Pyupgrade to Python 3.9
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104 lines
2.4 KiB
Python
104 lines
2.4 KiB
Python
"""
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Convert International System of Units (SI) and Binary prefixes
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"""
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from __future__ import annotations
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from enum import Enum
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class SI_Unit(Enum):
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yotta = 24
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zetta = 21
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exa = 18
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peta = 15
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tera = 12
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giga = 9
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mega = 6
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kilo = 3
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hecto = 2
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deca = 1
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deci = -1
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centi = -2
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milli = -3
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micro = -6
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nano = -9
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pico = -12
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femto = -15
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atto = -18
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zepto = -21
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yocto = -24
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class Binary_Unit(Enum):
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yotta = 8
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zetta = 7
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exa = 6
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peta = 5
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tera = 4
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giga = 3
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mega = 2
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kilo = 1
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def convert_si_prefix(
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known_amount: float,
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known_prefix: str | SI_Unit,
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unknown_prefix: str | SI_Unit,
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) -> float:
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"""
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Wikipedia reference: https://en.wikipedia.org/wiki/Binary_prefix
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Wikipedia reference: https://en.wikipedia.org/wiki/International_System_of_Units
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>>> convert_si_prefix(1, SI_Unit.giga, SI_Unit.mega)
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1000
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>>> convert_si_prefix(1, SI_Unit.mega, SI_Unit.giga)
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0.001
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>>> convert_si_prefix(1, SI_Unit.kilo, SI_Unit.kilo)
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1
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>>> convert_si_prefix(1, 'giga', 'mega')
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1000
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>>> convert_si_prefix(1, 'gIGa', 'mEGa')
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1000
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"""
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if isinstance(known_prefix, str):
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known_prefix = SI_Unit[known_prefix.lower()]
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if isinstance(unknown_prefix, str):
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unknown_prefix = SI_Unit[unknown_prefix.lower()]
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unknown_amount: float = known_amount * (
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10 ** (known_prefix.value - unknown_prefix.value)
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)
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return unknown_amount
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def convert_binary_prefix(
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known_amount: float,
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known_prefix: str | Binary_Unit,
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unknown_prefix: str | Binary_Unit,
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) -> float:
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"""
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Wikipedia reference: https://en.wikipedia.org/wiki/Metric_prefix
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>>> convert_binary_prefix(1, Binary_Unit.giga, Binary_Unit.mega)
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1024
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>>> convert_binary_prefix(1, Binary_Unit.mega, Binary_Unit.giga)
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0.0009765625
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>>> convert_binary_prefix(1, Binary_Unit.kilo, Binary_Unit.kilo)
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1
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>>> convert_binary_prefix(1, 'giga', 'mega')
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1024
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>>> convert_binary_prefix(1, 'gIGa', 'mEGa')
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1024
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"""
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if isinstance(known_prefix, str):
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known_prefix = Binary_Unit[known_prefix.lower()]
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if isinstance(unknown_prefix, str):
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unknown_prefix = Binary_Unit[unknown_prefix.lower()]
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unknown_amount: float = known_amount * (
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2 ** ((known_prefix.value - unknown_prefix.value) * 10)
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)
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return unknown_amount
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if __name__ == "__main__":
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import doctest
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doctest.testmod()
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