def file(self, filename):
        """
        Lex file.
        """
        with open(filename) as f:
            self.lexer.input(f.read())
        return self
def file(self, filename):
        """
        Lex file.
        """
        with open(filename) as f:
            self.lexer.input(f.read())
        return self
def file ( self , filename ) : with open ( filename ) as f : self . lexer . input ( f . read ( ) ) return self
Lex file.
Lex file .