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# vi: ts=4 expandtab
#
# Copyright (C) 2012 Yahoo! Inc.
#
# Author: Joshua Harlow <harlowja@yahoo-inc.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3, as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import io
from ConfigParser import (NoSectionError, NoOptionError, RawConfigParser)
# This config parser will not throw when sections don't exist
# and you are setting values on those sections which is useful
# when writing to new options that may not have corresponding
# sections. Also it can default other values when doing gets
# so that if those sections/options do not exist you will
# get a default instead of an error. Another useful case where
# you can avoid catching exceptions that you typically don't
# care about...
class DefaultingConfigParser(RawConfigParser):
DEF_INT = 0
DEF_FLOAT = 0.0
DEF_BOOLEAN = False
DEF_BASE = None
def get(self, section, option):
value = self.DEF_BASE
try:
value = RawConfigParser.get(self, section, option)
except NoSectionError:
pass
except NoOptionError:
pass
return value
def set(self, section, option, value):
if not self.has_section(section) and section.lower() != 'default':
self.add_section(section)
RawConfigParser.set(self, section, option, value)
def remove_option(self, section, option):
if self.has_option(section, option):
RawConfigParser.remove_option(self, section, option)
def getboolean(self, section, option):
if not self.has_option(section, option):
return self.DEF_BOOLEAN
return RawConfigParser.getboolean(self, section, option)
def getfloat(self, section, option):
if not self.has_option(section, option):
return self.DEF_FLOAT
return RawConfigParser.getfloat(self, section, option)
def getint(self, section, option):
if not self.has_option(section, option):
return self.DEF_INT
return RawConfigParser.getint(self, section, option)
def stringify(self, header=None):
contents = ''
with io.BytesIO() as outputstream:
self.write(outputstream)
outputstream.flush()
contents = outputstream.getvalue()
if header:
contents = "\n".join([header, contents])
return contents
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