Created
January 3, 2009 11:48
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example of parsing indented text using an indents stack
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| # example of parsing indented text using an indents stack | |
| def parse(lines): | |
| output = [] | |
| indents = [] | |
| def set_indent(i, begin, end): | |
| indents.append((i, end)) | |
| output.append(begin) | |
| def need_indent(indent): | |
| while indent < indents[-1][0]: | |
| output.append(indents.pop()[1]) | |
| return indent > indents[-1][0] | |
| set_indent(0, "<body>", "</body>") | |
| for line in lines.splitlines(): | |
| if line.strip(): | |
| indent = len(line) - len(line.lstrip()); line = line[indent:] | |
| if need_indent(indent): | |
| if line.startswith("* "): | |
| set_indent(indent, "<ul>", "</ul>") | |
| else: | |
| set_indent(indent, "<div class='indent'>", "</div>") | |
| if line.startswith("* "): | |
| set_indent(indent + 2, "<li>", "</li>") | |
| line = line[2:] | |
| output.append(line) | |
| while indents: | |
| output.append(indents.pop()[1]) | |
| return "\n".join(output) | |
| print parse(""" | |
| Line. | |
| Indented Line. | |
| * List1 | |
| * Sublist 1 | |
| * Sublist 2 | |
| * List2 | |
| Line in List | |
| Indented Line. | |
| """) |
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