Added volume conversions (#5607)

* Added volume conversions

This is a file which has relevant function which helps in conversion between volume units.
Available Units:- Cubic metre,Litre,KiloLitre,Gallon,Cubic yard,Cubic foot,cup

The file is also written in a way that , adding a new unit can easily be done by modifying tuple available in the source code

* Formatted file

The file was formatted to follow the syntax formatting rules of the repo

* Formatted file further

conversions/volume_conversions.py

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+"""
+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()