def _get_config(self, unit, filename):
"""Get a ConfigParser object for parsing a unit's config file."""
file_contents = unit.file_contents(filename)
# NOTE(beisner): by default, ConfigParser does not handle options
# with no value, such as the flags used in the mysql my.cnf file.
# https://bugs.python.org/issue7005
config = configparser.ConfigParser(allow_no_value=True)
config.readfp(io.StringIO(file_contents))
return config
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