[sqs]

Yin Wang is awesome and his work on programming languages and type inference is super impressive. We've been using his PySonar (v1) to build a global index of Python code and it works far better than we or anyone would have expected, for a dynamic language.

Here are some examples of what PySonar can do:

* Python stdlib, sorted by most-used functions: https://sourcegraph.com/hg.python.org/cpython

* Finding everywhere a function is used: https://sourcegraph.com/hg.python.org/cpython/symbols/python...

* All usages of the Django URL render_to_response function: https://sourcegraph.com/github.com/django/django/symbols/pyt...

* All usages of the Flask @app.route decorator: https://sourcegraph.com/github.com/mitsuhiko/flask/symbols/p...

This is all done using PySonar v1-based static analysis on Python code. PySonar v2 is even better.