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@jwass
Last active August 29, 2015 14:20
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Logging imported Python modules

Quick idea to understand what modules get imported.

Example:

>>> import importlog

# Run a bunch of code
>>> import shapely.geometry
>>> p = shapely.geometry.Point(0.0, 0.0)
>>> b = p.buffer(1.0)

# See which modules were imported.
>>> importlog.modules
{'array',
 'ctypes',
 'difflib',
 'future_builtins',
 'numbers',
 'numpy',
 'shapely',
 'unittest'}
import sys
modules = set()
class ImportLog(object):
def find_module(self, fullname, path=None):
name = fullname.split('.')[0]
modules.add(name)
# Returning None just continues import normally
return None
log = ImportLog()
sys.meta_path = [log]
@jwass
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jwass commented Apr 30, 2015

What's unittest doing there?

@sgillies
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I wrote a lot of the tests before I got clued in to nose and py.test. It's a standard lib module.

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