Decimal.compare_total

Compare two operands using their abstract representation.

Similar to the compare() method, but the result gives a total
ordering on Decimal instances.  Two Decimal instances with the same
numeric value but different representations compare unequal in this
ordering:

    >>> Decimal('12.0').compare_total(Decimal('12'))
    Decimal('-1')

Quiet and signaling NaNs are also included in the total ordering.
The result of this function is Decimal('0') if both operands have
the same representation, Decimal('-1') if the first operand is lower
in the total order than the second, and Decimal('1') if the first
operand is higher in the total order than the second operand.  See
the specification for details of the total order.

This operation is unaffected by context and is quiet: no flags are
changed and no rounding is performed.  As an exception, the C
version may raise InvalidOperation if the second operand cannot be
converted exactly.