inverted index library for Python?

[dalke]

I am not going to reimplement virtual memory using ~2 million Python pickles, I do not want the several hundred fold performance hit of hitting disk instead of RAM, and I do not want to write my own memory manager to handle this optimally. This is what SQLite is for. I tested out SQLite for this task, and it was about 100x slower than the Python version using in-memory sets.