> Majority of learning surface will come from framework and not the language
Once you get past the beginner level in Django, you're going to pick up a ton of Python knowledge (standard dunder methods, MRO, standard lib, data type's im/mutability, package ecosystem, etc.) and muscle memory along the way. Django (for the most part) is just plain old Python data structures, classes, and functions that a decent Django dev will apart, reuse, override, repurpose, and add on to as they do more interesting things. Python is boring (in a good way), however it has a lot of surface area (std lib is massive) and intricacies that a Django dev will pick up along the way to becoming an intermediate/advanced dev. It would take someone coming in fresh to Python quite a while to catch up. Naturally, if the same person knew several languages, the ramp up would be quite a bit quicker.
Once you get past the beginner level in Django, you're going to pick up a ton of Python knowledge (standard dunder methods, MRO, standard lib, data type's im/mutability, package ecosystem, etc.) and muscle memory along the way. Django (for the most part) is just plain old Python data structures, classes, and functions that a decent Django dev will apart, reuse, override, repurpose, and add on to as they do more interesting things. Python is boring (in a good way), however it has a lot of surface area (std lib is massive) and intricacies that a Django dev will pick up along the way to becoming an intermediate/advanced dev. It would take someone coming in fresh to Python quite a while to catch up. Naturally, if the same person knew several languages, the ramp up would be quite a bit quicker.