Version solver used by the dartpip command to resolve python modules.
The algorithm used by dartpip_solver is overly naive and does not take into account any
constraints. It simply iterates over all dependencies and their dependencies recursively and
collects all modules. For each module, it then downloads the latest version from PyPI, regardless
of whether it is compatible with the other modules or not.
We plan to improve the algorithm in the future to take into account constraints and to find the best possible combination of modules.
This, however, is no easy task, since this problem is known to be NP-hard.
The Pub Package Manager's version solver has a very promising approach to this problem, which we plan to implement in the future. See this blog post for more information.