class Cls(properties.Owner): value = properties.Property(required=True, default="default")
class Cls(properties.Owner): value = properties.Property(default="default")
class Cls(properties.Owner): value = properties.Property(required=True) def __init__(self, value=None): self.value = value
class Cls(properties.Owner): value = properties.Property(required=True)
class Cls(properties.Owner): value = properties.Property(doc="description")
class Cls(properties.Owner): value = properties.Property()