Just to mention that one of the authors of parso actually closed the related issue[1] pointing to the commit mentioned by Nicholas, 19de3eb.
In the same comment, a new issue about replacing pickle[2] was created to avoid the problem altogether, and the author suggest it will not happen soon. This probably means that we want to go with the approach suggested by Piotr to disable cache if we want to avoid the removal. 1: https://github.com/davidhalter/parso/issues/75 2: https://github.com/davidhalter/parso/issues/79 Best, -Marco
