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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def dir_class(cls):
 """Return a list of names available on `cls`. Eliminates names that bind to an `ObjectMethod` without a corresponding class method; see `ObjectMethod`. """

    # Class attributes (including methods).
    for name, value in vars_class(cls).items():
        if isinstance(value, ObjectMethod):
            if value.has_classmethod:
                yield name
        elif isinstance(value, Disabled):
            pass  # Hide this; disabled.
        else:
            yield name
    # Metaclass attributes.
    for name, value in vars_class(type(cls)).items():
        if name == "mro":
            pass  # Hide this; not interesting.
        elif isinstance(value, Disabled):
            pass  # Hide this; disabled.
        else:
            yield name