[python 2.7.5] 实现配置文件的读写

 import ConfigParser

 config = ConfigParser.RawConfigParser()

 # When adding sections or items, add them in the reverse order of
 # how you want them to be displayed in the actual file.
 # In addition, please note that using RawConfigParser's and the raw
 # mode of ConfigParser's respective set functions, you can assign
 # non-string values to keys internally, but will receive an error
 # when attempting to write to a file or when you get it in non-raw
 # mode. SafeConfigParser does not allow such assignments to take place.
 config.add_section('Section1')
 config.set('Section1', 'an_int', '')
 config.set('Section1', 'a_bool', 'true')
 config.set('Section1', 'a_float', '3.1415')
 config.set('Section1', 'baz', 'fun')
 config.set('Section1', 'bar', 'Python')
 config.set('Section1', 'foo', '%(bar)s is %(baz)s!')

 # Writing our configuration file to 'example.cfg'
 with open('example.cfg', 'wb') as configfile:
     config.write(configfile)

 config.read('example.cfg')

 # getfloat() raises an exception if the value is not a float
 # getint() and getboolean() also do this for their respective types
 a_float = config.getfloat('Section1', 'a_float')
 an_int = config.getint('Section1', 'an_int')
 print a_float + an_int

 # Notice that the next output does not interpolate '%(bar)s' or '%(baz)s'.
 # This is because we are using a RawConfigParser().
 if config.getboolean('Section1', 'a_bool'):
     print config.get('Section1', 'foo')

 config = ConfigParser.ConfigParser()
 config.read('example.cfg')

 # Set the third, optional argument of get to 1 if you wish to use raw mode.
 print config.get('Section1', 'foo', 0) # -> "Python is fun!"
 print config.get('Section1', 'foo', 1) # -> "%(bar)s is %(baz)s!"

 # The optional fourth argument is a dict with members that will take
 # precedence in interpolation.
 print config.get('Section1', 'foo', 0, {'bar': 'Documentation',
                                         'baz': 'evil'})