snakefood | http : //hg.furius.ca/public/snakefood/

I want to determine the imports of each python module in a library for use in a custom configuration management framework. I've seen tools like snakefood, but I'd prefer to compute a dependency graph during normal program execution, instead of as a ~compilation step.

So far I've tried writing a custom Finder and Loader. Both approaches work as expected the first time a module is imported, but don't trigger on subsequent imports thanks to the sys.modules cache.

I can override __built__.__import__ for notifications every time a module is imported, but it seems like this approach is ill-advised since PEP 302.

Is there an import hook I can place in front of sys.modules cache lookups? Or another way to quickly compute dependencies on the fly?

I have decided to try snakefood to help with a refactoring to check the imports. It keeps dumping output on the screen and ">" does not send it to a file, it just creates an empty file.

I had to unfortunately create a virtualenv with Python 2.7 as it probably does not work properly in Python 3. Still, it can probably check a Python 2 project, even though it is written in Python 2. Am using a Mac, but it seems to use similar commands to Linux on the command line.

I did

I am trying to convert an older library that maps dependencies called snakefood over to Python 3. I have 2 parts I can't figure out what to substitute as I can't find documentation on what either function does - from compiler.ast import Discard, Const I can't seem to find an equivalent in Python 3 in the ast library. Here are the function calls from Python 2, see both here being used in isinstance() calls:

I have several apps I'm developing that are for end users that have no idea how to use Python. I have already discovered how to setup a package that allows them to run any script without Python knowledge but I don't know how to minimize the distribution size by only including subsets (I.e. the actual function calls in large libs like NumPy) of each imported library that are required. Is there a way to output the actual subcomponents of each imported library that are actually accessed during the function? All my internet searches end up with cyclical imports which is not what I need. There must be some Python dependency walker equivalent I have yet to discover. Much appreciated any libs that can outline this.

[UPDATE] I converted Snakefood 1.4 over to Python 3x (3.5 tested to build) with python setup.py install and saved it here: https://github.com/mrslezak/snakefood per the accepted answer.