Python 无法使用pyparsing正确分析此文件
我正在尝试使用惊人的python库Python 无法使用pyparsing正确分析此文件,python,parsing,pyparsing,Python,Parsing,Pyparsing,我正在尝试使用惊人的python库pyparsing解析一个文件,但我遇到了很多问题 我试图解析的文件类似于: sectionOne: list: - XXitem - XXanotherItem key1: value1 product: milk release: now subSection: skey : sval slist: - XXitem mods: - XXone - XXtwo version: last s
pyparsing
解析一个文件,但我遇到了很多问题
我试图解析的文件类似于:
sectionOne:
list:
- XXitem
- XXanotherItem
key1: value1
product: milk
release: now
subSection:
skey : sval
slist:
- XXitem
mods:
- XXone
- XXtwo
version: last
sectionTwo:
base: base-0.1
config: config-7.0-7
正如您所看到的,是一个缩进的配置文件,这或多或少就是我试图定义语法的方式
- 该文件可以有一个或多个节
- 每个节由节名称和节内容组成
- 每个部分都有缩进的内容
- 每个节内容可以有一对或多对键/值或一个子节
- 每个值可以只是一个单词或一个项目列表
- 项目列表是由一个或多个项目组成的组
- 每个项目都是连字符+以“XX”开头的名称
import pprint
import pyparsing
NEWLINE = pyparsing.LineEnd().suppress()
VALID_CHARACTERS = pyparsing.srange("[a-zA-Z0-9_\-\.]")
COLON = pyparsing.Suppress(pyparsing.Literal(":"))
HYPHEN = pyparsing.Suppress(pyparsing.Literal("-"))
XX = pyparsing.Literal("XX")
list_item = HYPHEN + pyparsing.Combine(XX + pyparsing.Word(VALID_CHARACTERS))
list_of_items = pyparsing.Group(pyparsing.OneOrMore(list_item))
key = pyparsing.Word(VALID_CHARACTERS) + COLON
pair_value = pyparsing.Word(VALID_CHARACTERS) + NEWLINE
value = (pair_value | list_of_items)
pair = pyparsing.Group(key + value)
indentStack = [1]
section = pyparsing.Forward()
section_name = pyparsing.Word(VALID_CHARACTERS) + COLON
section_value = pyparsing.OneOrMore(pair | section)
section_content = pyparsing.indentedBlock(section_value, indentStack, True)
section << pyparsing.Group(section_name + section_content)
parser = pyparsing.OneOrMore(section)
def main():
try:
with open('simple.info', 'r') as content_file:
content = content_file.read()
print "content:\n", content
print "\n"
result = parser.parseString(content)
print "result1:\n", result
print "len", len(result)
pprint.pprint(result.asList())
except pyparsing.ParseException, err:
print err.line
print " " * (err.column - 1) + "^"
print err
except pyparsing.ParseFatalException, err:
print err.line
print " " * (err.column - 1) + "^"
print err
if __name__ == '__main__':
main()
正如你所看到的,我有两个主要问题:
1.-每个节内容在列表中嵌套两次
2.-当密钥“版本”属于“sectionOne”时,将在“subSection”内对其进行解析
我的真正目标是能够获得python嵌套字典的结构,其中包含键和值,以便轻松提取每个字段的信息,但是pyparsing.Dict
对我来说是一个模糊的东西
谁能帮帮我吗
提前谢谢
(很抱歉写了这么长的文章)你真的非常接近了-恭喜,缩进解析器不是用pyparsing编写的最容易的 查看注释的更改。标有“A”的是修改,以解决您的两个问题。标记为“B”的添加Dict构造,以便您可以使用配置中的名称作为嵌套结构访问解析的数据 最大的罪魁祸首是
indentedBlock
为您做了一些额外的分组,这妨碍了Dict的名称-值关联。使用解组
将其剥离,让Dict可以查看底层对
祝你好运
import pprint
import pyparsing
NEWLINE = pyparsing.LineEnd().suppress()
VALID_CHARACTERS = pyparsing.srange("[a-zA-Z0-9_\-\.]")
COLON = pyparsing.Suppress(pyparsing.Literal(":"))
HYPHEN = pyparsing.Suppress(pyparsing.Literal("-"))
XX = pyparsing.Literal("XX")
list_item = HYPHEN + pyparsing.Combine(XX + pyparsing.Word(VALID_CHARACTERS))
list_of_items = pyparsing.Group(pyparsing.OneOrMore(list_item))
key = pyparsing.Word(VALID_CHARACTERS) + COLON
pair_value = pyparsing.Word(VALID_CHARACTERS) + NEWLINE
value = (pair_value | list_of_items)
#~ A: pair = pyparsing.Group(key + value)
pair = (key + value)
indentStack = [1]
section = pyparsing.Forward()
section_name = pyparsing.Word(VALID_CHARACTERS) + COLON
#~ A: section_value = pyparsing.OneOrMore(pair | section)
section_value = (pair | section)
#~ B: section_content = pyparsing.indentedBlock(section_value, indentStack, True)
section_content = pyparsing.Dict(pyparsing.ungroup(pyparsing.indentedBlock(section_value, indentStack, True)))
#~ A: section << Group(section_name + section_content)
section << (section_name + section_content)
#~ B: parser = pyparsing.OneOrMore(section)
parser = pyparsing.Dict(pyparsing.OneOrMore(pyparsing.Group(section)))
要显示Dict层次结构,请执行以下操作:
[['sectionOne', ['list', ['XXitem', 'XXanotherItem']], ... etc. ...
- sectionOne: [['list', ['XXitem', 'XXanotherItem']], ... etc. ...
- key1: value1
- list: ['XXitem', 'XXanotherItem']
- mods: ['XXone', 'XXtwo']
- product: milk
- release: now
- subSection: [['skey', 'sval'], ['slist', ['XXitem']]]
- skey: sval
- slist: ['XXitem']
- version: last
- sectionTwo: [['base', 'base-0.1'], ['config', 'config-7.0-7']]
- base: base-0.1
- config: config-7.0-7
允许您编写如下语句:
print (result.sectionTwo.base)
您的配置格式看起来像YAML。你不能用“手工”来代替解析吗?谢谢你的评论@NikitaNemkin。是的,我可以使用PyYAM,事实上这就是我们现在正在使用的,但是我必须解析的文件来自一个涉众,他们倾向于引入一些小的修改,所以我们想开发一些内部解析器,以便能够相应地修改它,感谢您的快速响应。它现在工作得很好。你的图书馆很有趣,只是有点缺少文档。再次感谢,做得很好!
[['sectionOne', ['list', ['XXitem', 'XXanotherItem']], ... etc. ...
- sectionOne: [['list', ['XXitem', 'XXanotherItem']], ... etc. ...
- key1: value1
- list: ['XXitem', 'XXanotherItem']
- mods: ['XXone', 'XXtwo']
- product: milk
- release: now
- subSection: [['skey', 'sval'], ['slist', ['XXitem']]]
- skey: sval
- slist: ['XXitem']
- version: last
- sectionTwo: [['base', 'base-0.1'], ['config', 'config-7.0-7']]
- base: base-0.1
- config: config-7.0-7
print (result.sectionTwo.base)