Как в Python 2.7.13 изменить INI-файл с субсекциями?

[ "section 1" ]
# This comment goes with keyword 3
keyword 3 = value 3
'keyword 4' = value4, value 5, 'value 6'

    [[ sub-section ]]    # an inline comment
    # sub-section is inside "section 1"
    'keyword 5' = 'value 7'
    'keyword 6' = '''A multiline value,
that spans more than one line :-)
The line breaks are included in the value.'''

        [[[ sub-sub-section ]]]
        # sub-sub-section is *in* 'sub-section'
        # which is in 'section 1'
        'keyword 7' = 'value 8'

import re
s = """
[AC]
icon=battery-charging

[AC][DPMSControl]
idleTime=3600

[AC][HandleButtonEvents]
lidAction=64
powerButtonAction=8

[Battery]
icon=battery-060

[Battery][DPMSControl]
idleTime=300

[Battery][HandleButtonEvents]
lidAction=64
powerButtonAction=16

[LowBattery]
icon=battery-low

[LowBattery][BrightnessControl]
value=30

[LowBattery][HandleButtonEvents]
lidAction=64
powerButtonAction=16
"""


def parse(text):
    result = {}
    section_data = result
    rx_section = re.compile(r'\[.*?\]')
    rx_keyvalue = re.compile(r'^(.*?)=(.*)$')

    for line in text.splitlines():
        match = rx_section.findall(line)
        if match:
            section_data = result
            for section in match:
                section_data = section_data.setdefault(section, {})

        match = rx_keyvalue.match(line)
        if match:
            section_data[match.group(0)] = match.group(1)

    return result


pprint.pprint(parse(s))