簡單的數學運算子

Created: November-22, 2018

數值型別及其元類

numbers 模組包含數值型別的抽象元類：

子類	numbers.Number	numbers.Integral	numbers.Rational	numbers.Real	numbers.Complex
布林	✓	✓	✓	✓	✓
INT	✓	✓	✓	✓	✓
fractions.Fraction	✓	-	✓	✓	✓
浮動	✓	-	-	✓	✓
複雜	✓	-	-	-	✓
decimal.Decimal	✓	-	-	-	-