def adjust_whitespace(text):

    state = [False, False]
    (backslashed, triplequoted) = (0, 1)

    def in_multi_line(line):
        start_state = (state[backslashed] or state[triplequoted])

        if re.search(r"\\$", line):
            state[backslashed] = True
        else:
            state[backslashed] = False

        def match(reg, t):
            m = re.match(reg, t)
            if m:
                return m, t[len(m.group(0)):]
            else:
                return None, t

        while line:
            if state[triplequoted]:
                m, line = match(r"%s" % state[triplequoted], line)
                if m:
                    state[triplequoted] = False
                else:
                    m, line = match(r".*?(?=%s|$)" % state[triplequoted], line)
            else:
                m, line = match(r'#', line)
                if m:
                    return start_state

                m, line = match(r"\"\"\"|\'\'\'", line)
                if m:
                    state[triplequoted] = m.group(0)
                    continue

                m, line = match(r".*?(?=\"\"\"|\'\'\'|#|$)", line)

        return start_state

    def _indent_line(line, stripspace = ''):
        return re.sub(r"^%s" % stripspace, '', line)

    lines = []
    stripspace = None

    for line in re.split(r'\r?\n', text):
        if in_multi_line(line):
            lines.append(line)
        else:
            line = line.expandtabs()
            if stripspace is None and re.search(r"^[ \t]*[^# \t]", line):
                stripspace = re.match(r"^([ \t]*)", line).group(1)
            lines.append(_indent_line(line, stripspace))
    return "\n".join(lines)
Replaces literal string representation of null, '<Null>', with a true null value 
dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/mako/pygen.py/adjust_whitespace--crossover with--dataset/ETHPy150Open opencolorado/OpenColorado-Tools-and-Utilities/Scripts/ArcGIS/10.0/Python/PublishOpenDataset.py/replace_literal_nulls