def prev_content(self, start, amount=1):
        while start > 0 and self.code[start] in (' ', '\t', '\n'):
            start -= 1

        return self.code[(start or amount) - amount: start]
Returns the prev non-whitespace characters
dataset/ETHPy150Open timothycrosley/jiphy/jiphy/parser.py/Parser.prev_content