用pyparsing解析递归模板

Question

I'm currently trying to parse recursive templates with pyparsing. A template can look like this:

{{Attribute
| name=attr1
| description=First attribute.}}

The template has a name (Attribute) and defines some variables (name = attr1, description = First attribute.). However, there are also templates which can contain zero or more templates:

{{Enum
| name=MyEnum
| description=Just a test enum.
| example=Not given...
| attributes={{Attribute
| name=attr1
| description=First attribute.}}
{{Attribute
| name=attr2
| description=Second attribute.}}}}

To parse these templates I came up with the following:

template = Forward()
lb = '{{'
rb = '}}'
template_name = Word(alphas)
variable = Word(alphas)
value = CharsNotIn('|{}=') | Group(ZeroOrMore(template))
member = Group(Suppress('|') + variable + Suppress('=') + value)
members = Group(OneOrMore(member))
template << Suppress(lb) + Group(template_name + members) + Suppress(rb)

This works quite well, but it does not allow me to use "|{}=" within a value which is problematic if I want to use them. Eg:

{{Enum
| name=MyEnum
| description=Just a test enum.
| example=<python>x = 1</python>
| attributes=}}

So, how can I change my code so that it allows these characters, too? Unforunately, I have no idea how I can archieve this.

I hope someone can give me some tips!

Answer 1

我找到了想要的东西： https : //github.com/earwig/mwparserfromhell