We can easily assert the variable is defined, that is definitely, the needed enter binding was actually supplied by the contacting context: I was beating my head on this for quite a while just before finding what I feel is the answer. Python @properties are a subset of descriptors, and, https://propertyingurugram.in/m3m-to-develop-2-lakh-sq-ft-of-retail-space-in-gurgaon/