parameters: (self, base=None)
docstring: Initialise an instance.
  
          :param base: The base directory to explore under.
docstring_summary: Initialise an instance.
docstring_tokens: Initialise an instance .
function: def __init__(self, base=None):
          """
          Initialise an instance.
  
          :param base: The base directory to explore under.
          """
          self.base = os.path.abspath(os.path.normpath(base or os.getcwd()))
          self.prefix = self.base + os.sep
          self.allfiles = None
          self.files = set()
function_tokens: def __init__ ( self , base = None ) : self . base = os . path . abspath ( os . path . normpath ( base or os . getcwd ( ) ) ) self . prefix = self . base + os . sep self . allfiles = None self . files = set ( )