使用pyparsing(马克Tolonen,我正要点击“提交邮报”当你此帖一通),这是非常简单的 - 见嵌入代码如下意见:
data = """Group("GroupName") {
/* C-Style comment */
Group("AnotherGroupName") {
Entry("some","variables",0,3.141);
Entry("other","variables",1,2.718);
}
Entry("linebreaks",
"allowed",
3,
1.414
);
} """
from pyparsing import *
# define basic punctuation and data types
LBRACE,RBRACE,LPAREN,RPAREN,SEMI = map(Suppress,"{}();")
GROUP = Keyword("Group")
ENTRY = Keyword("Entry")
# use parse actions to do parse-time conversion of values
real = Regex(r"[+-]?\d+\.\d*").setParseAction(lambda t:float(t[0]))
integer = Regex(r"[+-]?\d+").setParseAction(lambda t:int(t[0]))
# parses a string enclosed in quotes, but strips off the quotes at parse time
string = QuotedString('"')
# define structure expressions
value = string | real | integer
entry = Group(ENTRY + LPAREN + Group(Optional(delimitedList(value)))) + RPAREN + SEMI
# since Groups can contain Groups, need to use a Forward to define recursive expression
group = Forward()
group << Group(GROUP + LPAREN + string("name") + RPAREN +
LBRACE + Group(ZeroOrMore(group | entry))("body") + RBRACE)
# ignore C style comments wherever they occur
group.ignore(cStyleComment)
# parse the sample text
result = group.parseString(data)
# print out the tokens as a nice indented list using pprint
from pprint import pprint
pprint(result.asList())
打印
[['Group',
'GroupName',
[['Group',
'AnotherGroupName',
[['Entry', ['some', 'variables', 0, 3.141]],
['Entry', ['other', 'variables', 1, 2.718]]]],
['Entry', ['linebreaks', 'allowed', 3, 1.4139999999999999]]]]]
(不幸的是,可能会有一些混乱,因为pyparsing定义了一个“组”类,赋予结构的解析令牌 - 注意条目中的值列表怎么弄分组,因为列表表达式是pyparsing集团内部封闭)
[本文](http://nedbatchelder.com/text/python-parsers.html)可能会引起您的兴趣。 –