Script to find blockers to Python 3 adoption across all of PyPI

cu3test.py

from collections import Counter
import logging
from pprint import pprint
import sys

import caniusepython3
from caniusepython3.dependencies import blocking_dependencies

logger = logging.getLogger(__name__)

def logging_excepthook(t, v, tb):
    """
    Ensure that uncaught exceptions are logged.
    """
    logger.error('uncaught exception: %s', v, exc_info=(t, v, tb))

sys.excepthook = logging_excepthook

logging.basicConfig(level=logging.DEBUG, filename='cu3test.log', filemode='w',
                    format='%(levelname)-8s %(name)-20s %(message)s')

all_py_projects = sorted(caniusepython3.pypi.all_projects())
print('got all projects (%d)' % len(all_py_projects))
py3_projects = caniusepython3.pypi.all_py3_projects()
print('got all Py3 projects (%d)' % len(py3_projects))

# Zap the locator cache if memory is low
# from distlib.locators import default_locator
# default_locator._cache = None

all_blockers = blocking_dependencies(all_py_projects, py3_projects)
print('got all blockers')
blocker_list = []
for blockers_subset in all_blockers:
    print(blockers_subset)
    for blocker in blockers_subset:
        print(blocker)
        blocker_list.append(blocker)
blockers_counter = Counter(blocker_list)
pprint(blockers_counter.most_common())