class SupportsFloat:
    def __float__(self):
        return 1.0

class SupportsComplex:
    def __complex__(self):
        return 1+2j

class SupportsIndex:
    def __index__(self):
        return 1

objects = {
    "SupportsFloat": SupportsFloat(),
    "SupportsComplex": SupportsComplex(),
    "SupportsIndex": SupportsIndex(),
    "float": 1.0,
    "complex": 1+2j,
    "int": 1,
}

#single_arg = []
#for name, obj in objects.items():
#    try:
#        complex(obj)
#    except Exception:
#        pass
#    else:
#        single_arg.append(name)
#print(single_arg)

double_arg = []
for name1, obj1 in objects.items():
    for name2, obj2 in objects.items():
        try:
            complex(obj1, obj2)
        except Exception:
            pass
        else:
            double_arg.append((name1, name2))

import pprint
pprint.pprint(double_arg)