parameters: (self, source, name=None, filename=None)
return_statement: return reduce(lambda s, e: e.preprocess(s, name, filename),
                        self.iter_extensions(), text_type(source))
docstring: Preprocesses the source with all extensions.  This is automatically
          called for all parsing and compiling methods but *not* for :meth:`lex`
          because there you usually only want the actual source tokenized.
docstring_summary: Preprocesses the source with all extensions.  This is automatically
          called for all parsing and compiling methods but *not* for :meth:`lex`
          because there you usually only want the actual source tokenized.
docstring_tokens: Preprocesses the source with all extensions . This is automatically called for all parsing and compiling methods but * not * for : meth : lex because there you usually only want the actual source tokenized .
function: def preprocess(self, source, name=None, filename=None):
          """Preprocesses the source with all extensions.  This is automatically
          called for all parsing and compiling methods but *not* for :meth:`lex`
          because there you usually only want the actual source tokenized.
          """
          return reduce(lambda s, e: e.preprocess(s, name, filename),
                        self.iter_extensions(), text_type(source))
function_tokens: def preprocess ( self , source , name = None , filename = None ) : return reduce ( lambda s , e : e . preprocess ( s , name , filename ) , self . iter_extensions ( ) , text_type ( source ) )