number_class(context=None)
Return a string describing the class of the operand. The returned value is one of the following ten strings.
"-Infinity", indicating that the operand is negative infinity.
"-Normal", indicating that the operand is a negative normal number.
"-Subnormal", indicating that the operand is negative and subnormal.
"-Zero", indicating that the operand is a negative zero.
"+Zero", indicating that the operand is a positive zero.
"+Subnormal", indicating that the operan