def peek(self, j=(<NUM_LIT:0>, <NUM_LIT:1>)):
try:<EOL><INDENT>if isinstance(j, int):<EOL><INDENT>return self[self.__i+j]<EOL><DEDENT>return self[self.__i + j[<NUM_LIT:0>]:self.__i + j[<NUM_LIT:1>]]<EOL><DEDENT>except IndexError:<EOL><INDENT>return None<EOL><DEDENT>
Peek at the next value(s), without advancing the Buffer.
Return None if index is out of range.