## Python, conversion, volume_conversions.py

``````"""
Conversion of volume units.
Available Units:- Cubic metre,Litre,KiloLitre,Gallon,Cubic yard,Cubic foot,cup
USAGE :
-> Import this file into their respective project.
-> Use the function length_conversion() for conversion of volume units.
-> Parameters :
-> value : The number of from units you want to convert
-> from_type : From which type you want to convert
-> to_type : To which type you want to convert
REFERENCES :
-> Wikipedia reference: https://en.wikipedia.org/wiki/Cubic_metre
-> Wikipedia reference: https://en.wikipedia.org/wiki/Litre
-> Wikipedia reference: https://en.wiktionary.org/wiki/kilolitre
-> Wikipedia reference: https://en.wikipedia.org/wiki/Gallon
-> Wikipedia reference: https://en.wikipedia.org/wiki/Cubic_yard
-> Wikipedia reference: https://en.wikipedia.org/wiki/Cubic_foot
-> Wikipedia reference: https://en.wikipedia.org/wiki/Cup_(unit)
"""

from collections import namedtuple

from_to = namedtuple("from_to", "from_ to")

METRIC_CONVERSION = {
"cubicmeter": from_to(1, 1),
"litre": from_to(0.001, 1000),
"kilolitre": from_to(1, 1),
"gallon": from_to(0.00454, 264.172),
"cubicyard": from_to(0.76455, 1.30795),
"cubicfoot": from_to(0.028, 35.3147),
"cup": from_to(0.000236588, 4226.75),
}

def volume_conversion(value: float, from_type: str, to_type: str) -> float:
"""
Conversion between volume units.
>>> volume_conversion(4, "cubicmeter", "litre")
4000
>>> volume_conversion(1, "litre", "gallon")
0.264172
>>> volume_conversion(1, "kilolitre", "cubicmeter")
1
>>> volume_conversion(3, "gallon", "cubicyard")
0.017814279
>>> volume_conversion(2, "cubicyard", "litre")
1529.1
>>> volume_conversion(4, "cubicfoot", "cup")
473.396
>>> volume_conversion(1, "cup", "kilolitre")
0.000236588
>>> volume_conversion(4, "wrongUnit", "litre")
Traceback (most recent call last):
File "/usr/lib/python3.8/doctest.py", line 1336, in __run
exec(compile(example.source, filename, "single",
File "<doctest __main__.volume_conversion[7]>", line 1, in <module>
volume_conversion(4, "wrongUnit", "litre")
File "<string>", line 62, in volume_conversion
ValueError: Invalid 'from_type' value: 'wrongUnit'  Supported values are:
cubicmeter, litre, kilolitre, gallon, cubicyard, cubicfoot, cup
"""
if from_type not in METRIC_CONVERSION:
raise ValueError(
f"Invalid 'from_type' value: {from_type!r}  Supported values are:\n"
+ ", ".join(METRIC_CONVERSION)
)
if to_type not in METRIC_CONVERSION:
raise ValueError(
f"Invalid 'to_type' value: {to_type!r}.  Supported values are:\n"
+ ", ".join(METRIC_CONVERSION)
)
return value * METRIC_CONVERSION[from_type].from_ * METRIC_CONVERSION[to_type].to

if __name__ == "__main__":
import doctest

doctest.testmod()
``````