To Complex, Real adds the operations that work on real numbers.
In short, those are: a conversion to float, trunc(), divmod, %, <, <=, >, and >=.
Real also provides defaults for the derived operations.
x.__init__(…) initializes x; see help(type(x)) for signature
Conjugate is a no-op for Reals.
Real numbers have no imaginary component.
Real numbers are their real component.