Update temperature_conversions.py (TheAlgorithms#2522)

* Update temperature_conversions.py

Added Reaumur scale unit conversions.

* Update temperature_conversions.py

* Update temperature_conversions.py

Author: SabariGanesh-K

conversions/temperature_conversions.py

@@ -303,6 +303,82 @@ def rankine_to_kelvin(rankine: float, ndigits: int = 2) -> float:
     return round((float(rankine) * 5 / 9), ndigits)
 
 
+def reaumur_to_kelvin(reaumur: float, ndigits: int = 2) -> float:
+    """
+    Convert a given value from reaumur to Kelvin and round it to 2 decimal places.
+    Reference:- http://www.csgnetwork.com/temp2conv.html
+
+    >>> reaumur_to_kelvin(0)
+    273.15
+    >>> reaumur_to_kelvin(20.0)
+    298.15
+    >>> reaumur_to_kelvin(40)
+    323.15
+    >>> reaumur_to_kelvin("reaumur")
+    Traceback (most recent call last):
+    ...
+    ValueError: could not convert string to float: 'reaumur'
+    """
+    return round((float(reaumur) * 1.25 + 273.15), ndigits)
+
+
+def reaumur_to_fahrenheit(reaumur: float, ndigits: int = 2) -> float:
+    """
+    Convert a given value from reaumur to fahrenheit and round it to 2 decimal places.
+    Reference:- http://www.csgnetwork.com/temp2conv.html
+
+    >>> reaumur_to_fahrenheit(0)
+    32.0
+    >>> reaumur_to_fahrenheit(20.0)
+    77.0
+    >>> reaumur_to_fahrenheit(40)
+    122.0
+    >>> reaumur_to_fahrenheit("reaumur")
+    Traceback (most recent call last):
+    ...
+    ValueError: could not convert string to float: 'reaumur'
+    """
+    return round((float(reaumur) * 2.25 + 32), ndigits)
+
+
+def reaumur_to_celsius(reaumur: float, ndigits: int = 2) -> float:
+    """
+    Convert a given value from reaumur to celsius and round it to 2 decimal places.
+    Reference:- http://www.csgnetwork.com/temp2conv.html
+
+    >>> reaumur_to_celsius(0)
+    0.0
+    >>> reaumur_to_celsius(20.0)
+    25.0
+    >>> reaumur_to_celsius(40)
+    50.0
+    >>> reaumur_to_celsius("reaumur")
+    Traceback (most recent call last):
+    ...
+    ValueError: could not convert string to float: 'reaumur'
+    """
+    return round((float(reaumur) * 1.25), ndigits)
+
+
+def reaumur_to_rankine(reaumur: float, ndigits: int = 2) -> float:
+    """
+    Convert a given value from reaumur to rankine and round it to 2 decimal places.
+    Reference:- http://www.csgnetwork.com/temp2conv.html
+
+    >>> reaumur_to_rankine(0)
+    491.67
+    >>> reaumur_to_rankine(20.0)
+    536.67
+    >>> reaumur_to_rankine(40)
+    581.67
+    >>> reaumur_to_rankine("reaumur")
+    Traceback (most recent call last):
+    ...
+    ValueError: could not convert string to float: 'reaumur'
+    """
+    return round((float(reaumur) * 2.25 + 32 + 459.67), ndigits)
+
+
 if __name__ == "__main__":
 
     import doctest