Create README.md

Author: c-sant

README.md

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+# Roman Numerals with Python
+
+> An implementation of Roman numerals in Python, made with the purpose of studying object-oriented programming as well as exploring dunder methods in Python.
+
+## :scroll: The Roman Integer
+
+There's a class called Roman which can receive either an integer or a string representing a Roman numeral (e.g. XVII).
+When printed, a Roman numeral is always going to be displayed in a Roman fashion. Other than that, it is a regular integer:
+it can perform sum, subtraction, multiplication and division with other Roman objects and integers.
+
+Roman numerals are always integers. It can be used as an integer if the Roman object is converted with the int() function.
+Warning: there are no representations of the number 0 or of float numbers, so passing them as Roman numerals will raise
+exceptions or ignore decimal values.
+
+## 💻 Requirements
+
+The following setup was used to make the source code on this repository:
+
+* Windows 10
+* Python 3.8.10