tests/sitecustomize.py

url: extract password database from password manager

So far password manager was keeping authentication information so opening
new connection and creating new password manager made all saved authentication
information lost.

This commit separates password manager and password database to make it
possible to reuse saved authentication information.

This commit violates code checker because it adds add_password method (name
with underscore) to passwordmgr object to provide method required by urllib2.

from __future__ import absolute_import
import os

if os.environ.get('COVERAGE_PROCESS_START'):
    try:
        import coverage
        import random

        # uuid is better, but not available in Python 2.4.
        covpath = os.path.join(os.environ['COVERAGE_DIR'],
                               'cov.%s' % random.randrange(0, 1000000000000))
        cov = coverage.coverage(data_file=covpath, auto_data=True)
        cov._warn_no_data = False
        cov._warn_unimported_source = False
        cov.start()
    except ImportError:
        pass