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+# Teoria: python Special Methods, Magic Methods ou Dunder Methods
+# Dunder = Double Underscore = __dunder__
+# Antigo e útil: https://rszalski.github.io/magicmethods/
+# https://docs.python.org/3/reference/datamodel.html#specialnames
+# __lt__(self,other) - self < other
+# __le__(self,other) - self <= other
+# __gt__(self,other) - self > other
+# __ge__(self,other) - self >= other
+# __eq__(self,other) - self == other
+# __ne__(self,other) - self != other
+# __add__(self,other) - self + other
+# __sub__(self,other) - self - other
+# __mul__(self,other) - self * other
+# __truediv__(self,other) - self / other
+# __neg__(self) - -self
+# __str__(self) - str
+# __repr__(self) - str