Library dependencies, such as managed by Conda or Pip (from PyPI). Any change in the expected interface from a dependency to your depickled objects will create

Library dependencies, such as managed by Conda or Pip (from PyPI). Any change in the expected interface from a dependency to your depickled objects will create an error. I author package "FooBar". FooBar creates objects of type "Baz" which will later be serialized by you, the FooBar user. Within the FooBar package: "def show(baz)" taking a Baz and displaying it. When I decide at one point to add an extra attribute to my "Baz" objects, I cannot (or should be extra careful) to use that attribute within that method if I expect the "Baz" objects to be pickled. This situation can be unpredictable and cause hard to track errors.