parameters: (self, key)
docstring: Accepts a key as input. The corresponding value must be a string or
          the objects (``True`` or 1) or (``False`` or 0). We allow 0 and 1 to
          retain compatibility with Python 2.2.
          
          If the string is one of  ``True``, ``On``, ``Yes``, or ``1`` it returns 
          ``True``.
          
          If the string is one of  ``False``, ``Off``, ``No``, or ``0`` it returns 
          ``False``.
          
          ``as_bool`` is not case sensitive.
          
          Any other input will raise a ``ValueError``.
          
          >>> a = ConfigObj()
          >>> a['a'] = 'fish'
          >>> a.as_bool('a')
          Traceback (most recent call last):
          ValueError: Value "fish" is neither True nor False
          >>> a['b'] = 'True'
          >>> a.as_bool('b')
          1
          >>> a['b'] = 'off'
          >>> a.as_bool('b')
          0
docstring_summary: Accepts a key as input. The corresponding value must be a string or
          the objects (``True`` or 1) or (``False`` or 0). We allow 0 and 1 to
          retain compatibility with Python 2.2.
          
          If the string is one of  ``True``, ``On``, ``Yes``, or ``1`` it returns 
          ``True``.
          
          If the string is one of  ``False``, ``Off``, ``No``, or ``0`` it returns 
          ``False``.
          
          ``as_bool`` is not case sensitive.
          
          Any other input will raise a ``ValueError``.
          
          >>> a = ConfigObj()
          >>> a['a'] = 'fish'
          >>> a.as_bool('a')
          Traceback (most recent call last):
          ValueError: Value "fish" is neither True nor False
          >>> a['b'] = 'True'
          >>> a.as_bool('b')
          1
          >>> a['b'] = 'off'
          >>> a.as_bool('b')
          0
docstring_tokens: Accepts a key as input . The corresponding value must be a string or the objects ( True or 1 ) or ( False or 0 ) . We allow 0 and 1 to retain compatibility with Python 2 . 2 . If the string is one of True On Yes or 1 it returns True . If the string is one of False Off No or 0 it returns False . as_bool is not case sensitive . Any other input will raise a ValueError . >>> a = ConfigObj () >>> a [ a ] = fish >>> a . as_bool ( a ) Traceback ( most recent call last ) : ValueError : Value fish is neither True nor False >>> a [ b ] = True >>> a . as_bool ( b ) 1 >>> a [ b ] = off >>> a . as_bool ( b ) 0
function: def as_bool(self, key):
          """
          Accepts a key as input. The corresponding value must be a string or
          the objects (``True`` or 1) or (``False`` or 0). We allow 0 and 1 to
          retain compatibility with Python 2.2.
          
          If the string is one of  ``True``, ``On``, ``Yes``, or ``1`` it returns 
          ``True``.
          
          If the string is one of  ``False``, ``Off``, ``No``, or ``0`` it returns 
          ``False``.
          
          ``as_bool`` is not case sensitive.
          
          Any other input will raise a ``ValueError``.
          
          >>> a = ConfigObj()
          >>> a['a'] = 'fish'
          >>> a.as_bool('a')
          Traceback (most recent call last):
          ValueError: Value "fish" is neither True nor False
          >>> a['b'] = 'True'
          >>> a.as_bool('b')
          1
          >>> a['b'] = 'off'
          >>> a.as_bool('b')
          0
          """
          val = self[key]
          if val == True:
              return True
          elif val == False:
              return False
          else:
              try:
                  if not isinstance(val, basestring):
                      # TODO: Why do we raise a KeyError here?
                      raise KeyError()
                  else:
                      return self.main._bools[val.lower()]
              except KeyError:
                  raise ValueError('Value "%s" is neither True nor False' % val)
function_tokens: def as_bool ( self , key ) : val = self [ key ] if val == True : return True elif val == False : return False else : try : if not isinstance ( val , basestring ) : # TODO: Why do we raise a KeyError here? raise KeyError ( ) else : return self . main . _bools [ val . lower ( ) ] except KeyError : raise ValueError ( 'Value "%s" is neither True nor False' % val )